New Single Board Computer M1

[superpowter77]

ODROID-M1

The ODROID-M1 is a single board computer with a wide range of useful peripherals developed for use in a variety of embedded applications.
To achieve this goal, we have developed various hardware accessories and device driver software over the past 10 months.
In addition, RK3568B2, the core brain of ODROID-M1, is considered suitable for embedded system use as the SoC manufacturer (Rockchip) guarantees supply for the next 15 years.
Therefore, we expect we can supply the ODROID-M1 boards to our important B2B customers until the year 2036 or beyond.
Note that RK3568B2 is a slightly modified version of the RK3568 to overcome the IC supply chain problem these days.
The previous RK3568 metal-can type packaging lead time is much longer than the more common plastic package of the RK3568B2.

Let's take a look at the main features and peripherals of ODROID-M1.

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Screenshot from 2022-03-30 10-14-45.png (76.89 KiB) Viewed 8428 times

Specifications

PROCESSOR
Rockchip RK3568B2 Processor
L1 instruction cache: 32 KB, 4-way set associative (128 sets), 64 byte lines, shared by 1 processor
L1 data cache: 32 KB, 4-way set associative (128 sets), 64 byte lines, shared by 1 processor
L3 data cache: 512KB , 16-way set associative (512 sets), 64 byte lines, shared by 4 processors
Quad-Core Cortex-A55 (1.992GHz) ARMv8-A architecture with Neon and Crypto extensions
Mali-G52 MP2 GPU (650Mhz)
NPU
0.8Tops@INT8, integrated high-performance AI accelerator RKNN NPU
Supports one-click switching of Caffe/TensorFlow/TFLite/ONNX/PyTorch/Keras/Darknet
MEMORY
8 or 4GiB LPDDR4 with 32-bit bus width
Data rate: 3120 MT/s, up to 1,560MHz
STORAGE
1 x eMMC slot
1 x Micro SD slot (DS/HS mode up to UHS-I SDR104)
1 x NVME M.2 SSD (PCIe 3.0 x 2)
1 x SATA3.0
NETWORKING
1 x GbE LAN ports (RJ45, supports 10/100/1000 Mbps)
– Realtek RTL8211F (Ethernet transceiver)
– LED indicators
* Green LED: Flashing by data traffic at 100Mbps connection
* Amber LED: Flashing by data traffic at 1000Mbps connection
DISPLAY
1 x HDMI 2.0 (up to 4K@60Hz with HDR, EDID)
1 x MIPI-DSI (works with 800 x 1280 LCD)
AUDIO
1 x 3.5mm phone jack
1 x mono speaker output
1 x HDMI sound
EXTERNAL I/O
2 x USB 2.0 host port
2 x USB 3.0 host port (or 1 x USB 3.0 host + 1 x USB 2.0 OTG port)
1 x Debug serial console (UART, 1.5Mbps N81)
1 x SATA Connector
1 x MIPI-CSI Camera Interface (15 pin)
1 x MIPI-DSI LCD Interface (31 pin)
1 x 40pin GPIO header
OTHER FEATURES
IR receiver for remote controller
RTC and backup battery holder (to keep time and date for several months without main power input)
System LED Indicators:
– Red (POWER) – Solid light when DC power is connected
– Blue (ALIVE) – Flashing “heartbeat” while Kernel is running. Solid On when in the u-boot stage.
POWER
1 x DC jack : outer (negative) diameter 5.5mm, inner (positive) diameter 2.1mm
DC input : 7.5V ~ 15.5V
– DC 12V/2A power adapter is recommended
– IDLE : ≃ 1.25W
– CPU Stress : ≃ 4.44W (Performance governor)
– Power Off : ≃ 0W
FORM FACTOR
Board Dimensions: 90mm x 122mm x 16mm
Heatsink Dimensions: 100mm x 123mm x 19mm
Weight: 253 g including heatsink


<1> The CPU has four ARM Cortex-A55 processors with low power consumption and high efficiency operation at 2Ghz. The CPU and GPU performance is quite similar to our ODROID-C4.
A larger 8GB of LPDDR4 DRAM Memory is available while there is also a 4GB model for reduced cost.


<2> Petitboot pre-installed into the on-board 16MiB of SPI-Flash Memory helps manage various OS and kernel versions easily and supports booting from microSD, eMMC, NVMe, SATA, and USB storage devices. In addition, since on-line OS installation using a network is possible, the cumbersome procedure of downloading and flashing an OS image is dramatically reduced like the ODROID-N2 series.


<3> A standard size 22mmx80mm M.2 NVMe storage device can be directly installed on the ODROID-M1 board. The M.2 connector has PCIe 3.0 2-lane configuration which can deliver a blazing fast 1600MB/sec of sequential access performance. Note that M.2 SATA storage devices can not be used. The M.2 slot supports only a PCIe interface (M-Key).

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<4> A single native (non-USB) SATA 3.0 port is provided for use with a 2.5inch HDD or SSD NAND Memory storage device. This SATA interface delivers near 500MB/s of sequential access. The SATA mount kit contains a SATA Data cable, a SATA Power cable, and a mount plate with some support screws. However, since the SATA power port doesn’t have a 12Volt power rail, a separated external 12Volt SATA power supply is required to use a 3.5inch HDD.

M1sataMountCableKitB (1).jpg (79.38 KiB) Viewed 10336 times

<5> The four-lane MIPI-DSI port can be directly connected to a LCD panel.
The ODROID-Vu8M kit with a 8inch 800x1280 wide viewing angle LCD and capacitive multi-touch screen is an available option.
If you assemble the ODROID-M1 single board computer on the rear side of the Vu8M kit, you can easily implement a Human-Machine-Interface (HMI) device.

ODROIDvu8mD (1).jpg (192.5 KiB) Viewed 10336 times

<6> The two-lane MIPI-CSI port can be directly connected to a camera sensor module.
Our MIPI camera kit has an OV5647 sensor chip which can capture up to 5 Mpixel images and 720p/30fps video streaming. You can get reasonably good imaging whether it is in the daytime or at night thanks to the automatically switchable IR-Cut filter and two IR Lights. Realtime image inputs from the MIPI-CSI port can be widely used for Machine-Learning applications.

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<7> Since Machine Learning has been a trend in this industry, there is a neural network processing unit (NPU) which can deliver up to 0.8 TOPS on the M1 single board computer.
We could run various TensorFlow Lite and ONNX models on Ubuntu Linux OS. Here is an example of object detection.

Input image and Output image ( The input image source : https://commons.wikimedia.org/wiki/File ... 6-28_1.jpg )

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When we measured performance of AI software, the yolov5s.onnx model with a traditional CPU+FPU+NEON combination took ~1800msec while the NPU acceleration only took ~60msec.
Another example is the mobilenet_v1_1.0_224.tflite model that showed ~286msec vs ~7msec. According to the test results, we can say the internal NPU hardware acceleration presents 30~40 times faster AI computing power in some use cases.
We will provide instructions for NPU development via our WiKi pages soon.


<8> Metal case kit
A sleek and cool blue Metal case is an available option to protect your ODROID-M1 board.
The metal cover is made with aluminum extrusion that has an abrasive blasted surface texture and anodized blue finish. It can be securely docked to the ODRID-M1 heatsink frame via sliding slot. The front and rear side covers were made with gold plated PCBs.

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<9> Power consumption and heat characteristics
Without any external peripherals connected, the M1 power consumption is about 4.5Watt with a very heavy computing load. It could be as low as 1.3Watt in the idle state.

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We also captured the power consumption transient during the booting process with our SmartPower3 equipment. Full Ubuntu Gnome desktop booting might take about 30~35 seconds (including a few seconds of Petitboot delay) when an eMMC module is the boot media.
After completing the booting process, the average idle mode power is around 1.3Watt.
In the shutdown mode, the power consumption is around 0.05Watt which could be considered negligible.

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Thanks to the huge heatsink frame, the thermal characteristics look quite good with very heavy CPU computing load. The CPU core temperature was near 50°C with a heavy computing load at a relatively high 35°C ambient temperature. This is very far from the thermal throttling trigger point, and the ODROID-M1 can run in various embedded system without noisy active cooling.

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<10> Analog audio output sound quality
There is a 3.5mm stereo headphone jack on the M1 board.
It presents an on-board high quality 384Khz/32bit stereo audio output.
Dynamic range and SNR is near 100dB and "Total-Harmonic-Distortion + Noise" is lower than 0.01%.
You can enjoy Hi-Fi sound quality without an expensive external audio DAC.
We have measured the sound quality with Audio-Precision equipment as usual.

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ODROID-M1_THDN-Ratio.jpg (39.21 KiB) Viewed 10336 times

<11> Software support
Ubuntu 20.04 LTS & 22.04 LTS
Kernel 4.19.219
Wayland based GNOME desktop
Mali GPU EGL driver on Wayland
MIPI DSI and CSI drivers
NPU drivers and Neural Network APIs
GPIO drivers and WiringPi library
Mainline kernel will be available several months later with Panfrost driver hopefully

Android 11 Red Velvet Cake
Kernel 4.19.193
Dual head display feature : HDMI and MIPI-DSI at the same time.
Please look into the demo video.



Since many ‘M’ characters are found in this document …
8GB LPDDR4 DRAM Memory
M.2 NVMe Flash Memory
SATA SSD Flash Memory
SPI-Flash Memory
MIPI-DSI port
MIPI-CSI port
Machine Learning Neural Network Processor
Metal case kit

Naturally, we’ve decided on the product name ODROID-M1 which should not be confused with Apple’s M1 silicon.



Availability and prices
Orders for the M1 boards and new peripheral devices are available now with shipping several days later.
ODROID-M1 4GB RAM : $70
https://www.hardkernel.com/shop/odroid- ... gbyte-ram/
ODROID-M1 8GB RAM : $90
https://www.hardkernel.com/shop/odroid- ... gbyte-ram/
ODROID-Vu8M MIPI-DSI Kit : $79
https://www.hardkernel.com/shop/odroid-vu8m/
M1 MIPI-CSI Camera Kit : $20
https://www.hardkernel.com/shop/m1-mipi-csi-camera-kit/
M1 SATA mount and cable Kit : $9
https://www.hardkernel.com/shop/m1-sata ... cable-kit/
M1 Metal case Kit : $9
https://www.hardkernel.com/shop/m1-metal-case-kit/
WiFi & Bluetooth Combo Module 5BK: $8.90
https://www.hardkernel.com/shop/wifi-module-5bk/




Debug Party
Newly introduced single board computers might have many bugs here and there.
We are going to ship developer packages in a couple of days to our community members for the Debug party.
The developer’s package contains the following items.
ODROID-M1 with 8GB DRAM engineering sample
16GB eMMC
ODROID-Vu8M Display Kit
M1 MIPI-CSI Camera Kit
M1 SATA mount and cable Kit
M1 Metal case kit
12V/2A PSU
WiFi Module 5BK
USB-UART kit



Additional comments
Compared to other SBC manufacturers, our RK3568-based M1 board release is a little late.
However, we believe that developing a product offering that is more complete and convenient to use is much more important than the time to market.
Our SBC products that will be released in the future will need more time to launch, but we need to keep investing enough time and resources to make more useful and practical devices.

Another comment. Do you need a much more expensive ODROID board than M1?
Many people have been continuously asking for some high end models.
We have a couple of our own proto-type boards for internal development and evaluation.
We will be launching those models once we are ready to sell in Q4 or early next year if we will not cancel the projects.
If we meet any development, procurement, certification, or other unexpected issues, the schedule will inevitably be delayed a few more months at least.
Therefore, please be patient until our release announcement appears because we don’t want to misinform.

[odroid]

Reserved #1

Update: We've just opened M1 WiKi pages publicly.

ODROID-M1 : https://wiki.odroid.com/odroid-m1/odroid-m1
Vu8M : https://wiki.odroid.com/accessory/displ ... eries/vu8m
M1 MIPI Camera kit : https://wiki.odroid.com/accessory/camera/ov5647
M1 SATA mount and cable kit : https://wiki.odroid.com/accessory/cables/sata_holder

[odroid]

Reserved #2

Update: ODROID-M1 sub-forum has been created.
Feel free to write any relevant questions and comments on that.
viewforum.php?f=210

[rooted]

It's shocking you were able to pull off releasing a new board right now with the chip shortage, I'm really excited about this. We finally have an Odroid with NPU and MIPI @crashoverride !!!

I forgot to add the industrial style case is very fitting and looks nice.

[L67GS]

This is incredible, you guys really made something amazing here, and the price is more than fair. Now I want to build another robot.
Obviously I'm ordering one immediately, is the lens kit necessary or a luxury item? This will be my first MIPI project.

[PigLover]

Does the case fit with a SATA drive installed (it doesn’t appear to). If not, do you have plans for a case that will include SATA?

[zupet]

when it be available from hardkernel's korean page ?

[moon.linux]

Congratulations on getting this new Rcokchip SBC, can you add me to debug party.

[rooted]

Another comment. Do you need a much more expensive ODROID board than M1?
Many people have been continuously asking for some high end models.
We have a couple of our own proto-type boards for internal development and evaluation.
We will be launching those models once we are ready to sell in Q4 or early next year if we will not cancel the projects.
If we meet any development, procurement, certification, or other unexpected issues, the schedule will inevitably be delayed a few more months at least.
Therefore, please be patient until our release announcement appears because we don’t want to misinform.

It you are referring to rk3588 oh my yes, this will be a desktop replacement for a lot of people. I've been tracking various sites and forums and this SoC has a ton of interest and hype from developers and end users. I know software support will be lacking for at least 12 months but it's good to stay ahead of the curve.

[mad_ady]

Well, it looks like somebody has been reading the wish list page and has been taking notes!
Apart from the high-end cpu that is requested most of the time, everything else seems to be spot-on!
I really like the following:
* NPU - this will open up some new use cases in photo management (building a photo library with photos that have faces, finding photos with a specific face, finding blurry/dark photos), or home automation - doing something when a specific person/item is seen
* Rockchip - I still love my N1!
* Petitboot - having flexibility is great!
* Form factor/case/accessories

I'm sure all other factors will make this a great board!

Congratulations Hardkernel on a wonderful design!

[moon.linux]

Off the topic of new SBC, the general trend is let build SBC with the carrier board,
so that hobby PCB developers could build work around boards with custom features. just like RPI4 CM4 and Radxa CM3.
So this will be the best feature for the next SBC development in the future.

[brad]

2x pcie gen3 lanes, a sata port, high quality audio output, 8Gb RAM... I'm sold

[L67GS]

This is incredible, you guys really made something amazing here, and the price is more than fair. Now I want to build another robot.
Obviously I'm ordering one immediately, is the lens kit necessary or a luxury item? This will be my first MIPI project.

You don't need the separated lens kit.
The stock lens must be enough for your Candice robot project probably.

[odroid]

Does the case fit with a SATA drive installed (it doesn’t appear to). If not, do you have plans for a case that will include SATA?

Right. The Metal case kit is not compatible with a SATA drive.
We have no plan to make other cases at this moment. Sorry about that.

[odroid]

when it be available from hardkernel's korean page ?

Korean pages have been activated.

[istanbulls]

I woke up in the morning with a very nice surprise.
First of all, congratulations, I hope it will be the beginning of a long-running and popular series like N2.
When I look roughly, a new multifunctional Odroid is waiting for us where we can try many new things.

We look forward to the stronger ODROID together with the whole world.
cross finger

[crashoverride]

We finally have an Odroid with NPU and MIPI

I also noticed a "RESET#" signal line on connector "T"! I am very excited about this board.

[crashoverride]

One additional thing worth mentioning is that (based on the block diagram) the 2 x USB3 ports are independent. They do not share bandwidth. Each is a root controller without an integrated hub.

[L67GS]

Ordered the 8gig, it was the one I wanted but I noticed the 4gig versions are already sold out! It was probably vendors grabbing up stock.

You don't need the separated lens kit.
The stock lens must be enough for your Candice robot project probably.

She's too simple and small for such a thing, but I have considered making her a body with a really mean little SBC that was well suited to robotics if one came along ......

Out of curiosity could you post here how many hours passed from the time you announced the release till the 4gig model sold out?

EDIT: Already updated the "owned devices" in my profile, WOOT!

[odroid]

Might be a few hours. We prepared much more quantity of 8G model since many users requested more RAM space.
But, most of our B2B customers (relatively larger scale) might think 4GB is enough for their embedded system application because they are more cost-sensitive.
Anyway, the next batch of the 4GB model will be available 3~4 weeks later.

[mad_ady]

I have a design question to ask! Why wasn't the sata power connector hooked up to a 12V line? Is it the same case with N1 that the voltage regulator outputs less than 12V and if you were to wire it directly to 12V input you would force the user to only use a 12V PSU? I take it that in this case a "fix" of wiring a short cable between PSU+ and the "12V" pin on the sata power connector would be ok on condition of only using 12V PSU (the same case as with N1)? Perhaps a different design choice would have been to wire it to PSU IN, but run it through a jumper, so the user acknowledges that he might fry his disk if using a larger input voltage...

Also - having a dedicated mono speaker socket seems very strange. What's the use case for it? Is it common in industrial settings?

[crashoverride]

Also - having a dedicated mono speaker socket seems very strange. What's the use case for it? Is it common in industrial settings?

It appears to be the same case as with the ODROID-GO Advance/Super. The audio is part of Rockchip's power management IC (PMIC) as shown in the block diagram. It makes sense to expose the capability on the board.

[edit]
I should probably add that MIPI-DSI does not include sound. Its very useful to have a speaker connector if using only a LCD panel.

[mad_ady]

So, it's a different audio IC for HDMI audio?

[crashoverride]

So, it's a different audio IC for HDMI audio?

The PMIC (RK809) includes a DAC and audio amplifier. The sound is from the internal I2S port connected to it.

[edit]
I can not say for certain until I get a M1, but typically the HDMI port has its own audio path since its encoded as part of the protocol.

[mctom]

Low power consumption will make it an excellent laptop / UMPC base. Just replace the overkill heatsink with aliminum shell...

[odroid]

I have a design question to ask! Why wasn't the sata power connector hooked up to a 12V line? Is it the same case with N1 that the voltage regulator outputs less than 12V and if you were to wire it directly to 12V input you would force the user to only use a 12V PSU? I take it that in this case a "fix" of wiring a short cable between PSU+ and the "12V" pin on the sata power connector would be ok on condition of only using 12V PSU (the same case as with N1)? Perhaps a different design choice would have been to wire it to PSU IN, but run it through a jumper, so the user acknowledges that he might fry his disk if using a larger input voltage...

Since many embedded systems require a wide input voltage like 9V~15V, we should add a large (>20Watt) footprint and expensive adaptive step-up/step-down converter circuitry to the motherboard for generating a stable 12Volt source for 3.5" HDD.
Instead of that non-economical way, we thought an external SATA PSU (only several bucks) something like the following picture is a better solution.

sata_psu.png (206.31 KiB) Viewed 9250 times

We still believe (relatively) very few people are interested in using a mechanical disk these days and it is almost impossible to satisfy all the different use cases.

[mctom]

So, it's a different audio IC for HDMI audio?

The PMIC (RK809) includes a DAC and audio amplifier. The sound is from the internal I2S port connected to it.

[edit]
I can not say for certain until I get a M1, but typically the HDMI port has its own audio path since its encoded as part of the protocol.

HDMI output is often (always?) recognized as a separate sound adapter, and indeed sound is encoded within the video data (during blanking period). There are no dedicated wires for HDMI audio, hence no dedicated chips.

I believe a built in speaker amp is an excellent idea for all sorts of kiosks, vending machines and multimedia displays. Usually a mono speaker with low power is enough for this purpose.

This board is an excellent choice for multimedia projects, including interactive museums, which are getting very popular here. I already tipped off my pal who makes this kind of stuff..
However, for all these scenarios, would it make sense to offer.. less RAM?
I mean, 1GB would be more than enough for most of that, especially in cost sensitive applications.

[gkkpch]

Can we use SPDIF (currently disabled)?
GPIO1.A4 has not been exposed, but could we use another pin by changing the dts with adding an extra dt overlay?

[cdu13a]

Congrats on the rather nice looking new board.

As for being a little late, I think the M1 might be right on time for many people.

[AreaScout]

Yes ! RockChip SoC And the first with an NPU -> can't wait

MuaKissGIF.gif (307.7 KiB) Viewed 9094 times

Regards,
Daniel

[Ameridroid]

For our customers, we have the M1 available for pre-order and will be shipping them and related accessories as soon as they arrive at our California warehouse: https://ameridroid.com/products/odroid-m1

[m_ueberall]

Let me be the first to ask: But what about overclocking (https://wiki.odroid.com/odroid-m1/hardware/overclocking doesn't exist yet)? Can we get the four cores to run at, say, 2.2GHz?
Also, the above post mentions "Quad-Core Cortex-A55 (1.992GHz) ARMv8-A architecture […]" — It's ARMv8.2-A, right? This might be of importance for those who like to install, e.g., Couchbase (IIRC, this requires said ARMv8.2 support, but I forgot where I read it first).

[crashoverride]

It's ARMv8.2-A, right?

The Cortex-A55 is an ARMv8.2-A part:
https://en.wikipedia.org/wiki/ARM_Cortex-A55

The ARM Cortex-A55 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings' Cambridge design centre. The Cortex-A55 is a 2-wide decode in-order superscalar pipeline.

[PigLover]

Does the case fit with a SATA drive installed (it doesn’t appear to). If not, do you have plans for a case that will include SATA?

Right. The Metal case kit is not compatible with a SATA drive.
We have no plan to make other cases at this moment. Sorry about that.

No worries and thanks very much for what looks to be a very nice & useful board. A case that will accommodate the HD shouldn't be too hard to design/print. It just won't be as nice looking as your sleek metal case!

[domih]

8GB memory + NVMe PCIe Gen 3 x2 + SATA III + eMMC with ARM < $100 = respect.

I ordered mine on Ameridroid with eMMC 64GB, Camera, SATA mount, USD UART kit for less than $200 (wo tax and shipping)

A real whiff of fresh air compared to all these boards with no accessories > $200.

Congratulations to the HK engineering team.

[mctom]

It's ARMv8.2-A, right?

The Cortex-A55 is an ARMv8.2-A part:
https://en.wikipedia.org/wiki/ARM_Cortex-A55

The ARM Cortex-A55 is a central processing unit implementing the ARMv8.2-A 64-bit instruction set designed by ARM Holdings' Cambridge design centre. The Cortex-A55 is a 2-wide decode in-order superscalar pipeline.

Some more errors I've spotted on the Shop page:
- "A standard size 42mm M.2 NVMe" <- I think it's 80mm
- "Total-Harmonic-Distortion is lower than 0.006%" <- actually you've measured THD+N, Total Harmonic Distortion + Noise, which is actually even better.
- GPIO missing in specifications

[odroid]

Some more errors I've spotted on the Shop page:
- "A standard size 42mm M.2 NVMe" <- I think it's 80mm
- "Total-Harmonic-Distortion is lower than 0.006%" <- actually you've measured THD+N, Total Harmonic Distortion + Noise, which is actually even better.
- GPIO missing in specifications

Thanks. We've updated.
Also changed the input voltage range from "12V~15.5V" to "7.5V~15.5V".

[m_ueberall]

Let me be the first to ask: But what about overclocking (https://wiki.odroid.com/odroid-m1/hardware/overclocking doesn't exist yet)? Can we get the four cores to run at, say, 2.2GHz?

There is no proper/graceful way to overclock the RK3568 processor since Rockchip limits the maximum clock via their binary firmware blobs.

[phaseshifter]

what a beast i got to have one sozz for my lack of looking but how many cores ..??/ love the hdd led and the nvme and inbuilt petitboot what a unit,,got to have one of these..oh yeah!!!! the n-1 predo cessor ok its a quad core well thats fine..

[zupet]

https://support.wdc.com/images/kb/2579-771970-A03.pdf


dimension of 3.5" hdd is 101.6mm x 147.0mm x 26.1mm
it will fit in 3.5" hdd slot.

[odroid]

Can we use SPDIF (currently disabled)?
GPIO1.A4 has not been exposed, but could we use another pin by changing the dts with adding an extra dt overlay?

It is not possible since there is no exposed SPDIF output signal at all. Sorry about that.

[rooted]

Can we use SPDIF (currently disabled)?
GPIO1.A4 has not been exposed, but could we use another pin by changing the dts with adding an extra dt overlay?

It is not possible since there is no exposed SPDIF signal at all. Sorry about that.

Being the M1 has excellent audio coming out of the 3.5mm jack already it seems a 3.5 to SPDIF would be adequate?

[odroid]

Nope. Most of the audiophile mania might need a simple bit-perfect lossless digital audio stream instead of the complicated and noisy ADC-DAC -> SPDIF -> DAC data conversions.

[brad]

Nope. Most of the audiophile mania might need a simple bit-perfect lossless digital audio stream instead of the complicated and noisy ADC-DAC -> SPDIF -> DAC data conversions.

An I2S to SPDIF converter chip / board might be suitable here to hang of the GPIO's

[L67GS]

That didn't take long, 4 or 5 write-ups and blog posts already. And not a chance any of those people have put hands on one.
https://www.cnx-software.com/2022/03/29 ... 568b2-sbc/

[rooted]

That didn't take long, 4 or 5 write-ups and blog posts already. And not a chance any of those people have put hands on one.
https://www.cnx-software.com/2022/03/29 ... 568b2-sbc/

I always tip off Jean Luc (cnxsoft) about new Odroid products, but I think someone else told him about this or he seen it himself as someone falsely reported fishing and his DNS got temporarily shutdown yesterday and my emails to him bounced back and the site itself was down for a while.

[fvolk]

We still believe (relatively) very few people are interested in using a mechanical disk these days

Since Odroid boards have unfortunately a history of power up/down problems with 2.5" mechanical drives (viewtopic.php?f=205&t=38567&p=289572), did you test whether this board design works fine with SATA and USB mechanical disks?

Does this board support stably the most power demanding 2.5" disks with 5TB (internal and USB external)?

Thank you!

[rooted]

The power will be supplied externally not by the USB?

*edit*
I just realized you mean bus powered drives.

The start-up current of a Seagate 2.5" 5tb drive is 1.2A which is pretty high so I see the point of your question.

[gkkpch]

Nope. Most of the audiophile mania might need a simple bit-perfect lossless digital audio stream instead of the complicated and noisy ADC-DAC -> SPDIF -> DAC data conversions.

Correct, in this case the best alternative is a good usb audio dac.
When usb on M1 performs as well as with the N2+ (a direct hifi hit according to some audiophiles) then maybe HK scores another one.

[mctom]

Nope. Most of the audiophile mania might need a simple bit-perfect lossless digital audio stream instead of the complicated and noisy ADC-DAC -> SPDIF -> DAC data conversions.

Correct, in this case the best alternative is a good usb audio dac.
When usb on M1 performs as well as with the N2+ (a direct hifi hit according to some audiophiles) then maybe HK scores another one.

I think M1 might have the best USB implementation to date, as someone pointed out each USB port is an independent root.
Oh yes, the audio quality over that USB stream will be perfect