M4-R1 Introduction

Chapter 1 Product Overview

1.1 Scope of application

ShimetaPi M4-R1 V1.0 belongs to the ShimetaPi series motherboards. The RK3568B2 chip used is a low-power, high-performance processor. It is widely used in video terminal products, industrial automation terminals, and computing terminal products, such as: smart self-service terminals, O2O smart devices, industrial control hosts, robotic equipment, etc.

1.2 Appearance and interface diagram

front:

BOARD_2

back:

BOARD_3

Front view:

BOARD_4

Photo Statement

The above photos were taken from a batch of boards produced by our company. Due to the continuous maintenance of the products, the boards actually shipped may not be consistent with the photos.

Chapter 2 Basic Function List

Function	Describe
Board size	110*73mm
CPU	Rockchip RK3568B2； quad-core 64-bit Cortex-A55； main frequency up to 2.0GHz
GPU	ARM G52 2EE； supports OpenGL ES 1.1/2.0/3.2, OpenCL 2.0, Vulkan 1.1; embedded high-performance 2D acceleration hardware
NPU	Support 1Tops computing power
operating system	Linux and open source Hongmeng system
Memory/Storage	Standard 4GB / Standard 32GB
HDMI output	1-way, standard Type-A female connector, supports up to 4Kx2K@60Hz resolution
MIPI output	1 channel, can directly drive MIPI interface LCD screens with various resolutions, and has supported 720*1280 resolution
MIPI Input	1 channel, can support 800W pixels
edp output	1 channel, can directly drive eDP interface LCD screens with various resolutions, and has supported 1920*1080 resolution
Headphone output	Support one-way three/four-band headphone insertion
USB interface	1-way USB3.0 OTG, 1-way USB3.0 HOST, 2-way USB2.0 HOST
Serial Port	1 TTL, 1 Debug
I2C Interface	3 channels, can be connected to TP or peripherals with I2C interface
Raspberry Pi Interface	1-way, 2*20PIN pin socket, spacing 2.0MM
Network support	Supports 2-way 10/100/1000M adaptive Ethernet; built-in Wi-Fi, supports Bluetooth 4.2
storage	Support U disk, TF card expansion storage
RTC Real Time Clock	Support low power consumption
System Upgrade	Support local USB upgrade
key	1 POWER ON button; 1 Uboot burning button
LED	2-way, user programmable indicator lights

Chapter 3 PCB Size and Interface Layout

3.1 PCB Dimensions

BOARD_5

PCB ： 8-layer board, thickness 1.6mm

PCBA： L _ W = 110mm_ 73mm

Screw hole specifications: ∮3.0mm x 4

Warning

Heat dissipation design
The actual size of the product shall prevail

3.2 Interface parameter description

Picture annotation instructions: The circle on the socket interface picture BOARD_6 indicates the first pin, and the red socket BOARD_7 indicates the first pin

3.2.1 Power input (6pin/1.0mm)

(1) Functional description:

The board is powered by a 5V DC power supply, and is only allowed to be powered by the Type-C USB port and the 6pin1.0mm power socket.
When no external devices are connected and the load is empty, the 5V DC power supply must support a minimum current of 1000mA.

(2) Electrical definition:

Serial number	definition	property	Describe
1	5V	enter	5V Input
2	5V	enter	5V Input
3	5V	enter	5V Input
4	GND	Ground	Ground
5	GND	Ground	Ground
6	GND	Ground	Ground

3.2.2 MIC interface (2pin/1.25mm)

(1) Functional description:

The motherboard has a MIC interface for connecting an external microphone.

(2) Electrical definition:

Serial number	definition	property	Describe
1	MIC+	enter	MIC+
1	MIC-	enter	MIC-

Warning

Pay attention to the connection of the positive and negative poles of the MIC, and do not connect them in reverse;
When there is no external load connected, the 5V DC power supply must support a minimum current of 1000mA.

3.2.3 RTC interface (2pin/1.25mm)

(1) Functional description:

The motherboard has a 2-pin 1.25mm pitch Wafer socket interface, which is used to power the system clock when the power is off.

(2) Electrical definition:

Serial number	definition	property	describe
1	RTC	enter	3V input
2	GND	Ground	Ground

Warning

When using the RTC battery, pay attention to whether the positive and negative poles are correct. Reverse connection may cause a short circuit, which may result in a risk of fire and explosion.
If the RTC time is found to be inaccurate during use, please replace the RTC battery in time and choose the correct 3V, CR2036 button battery. If you need to use a battery with a wire, please contact FAE to provide the corresponding model specifications.

3.2.4 DEBUG serial port interface (4pin/1.0mm)

(1) Functional description:

Used for printing out system logs and UART Debug of RK3588.

(2) Electrical definition:

Serial number	definition	property	describe
1	GND	Ground	Ground
2	UART-RX	enter	RX2
3	UART-TX	Output	TX2
4	NC	---	Alley-oop

Warning

Pay attention to whether the TX and RX connections are correct.
The default serial port printing baud rate is 1500000bps.
If the level of the connected serial port is higher than 3.3V, an isolation circuit or level conversion circuit is required, otherwise the main control and equipment will be burned out.

3.2.5 FAN interface (4pin/1.0mm)

(1) Functional description:

The board has 1 fan interface, supports 5V fans, and supports PWM speed adjustment.

(2) Electrical definition:

Serial number	definition	property	describe
1	5V	power supply	5V power supply
2	PWM	Output	Fan speed adjustment control
3	GND	Ground	Ground
4	NC	---	Alley-oop

Warning

When installing the fan, pay attention to whether the pin definitions are consistent.

3.2.6 TP interface (10pin/0.5mm)

(1) Functional description:

The board supports TP screen connected to I2C interface, and the interface is in the form of 10pin 0.5mm pitch vertical FPC socket.

(2) Electrical definition:

Serial number	definition	property	describe
1	GND	Ground	Ground
2	GND	Ground	Ground
3	RST	Input/Output	Reset
4	INT	Input/Output	Interrupt
5	GND	Ground	Ground
6	SCL	Input/Output	I2C Clock
7	SDA	Input/Output	I2C Data
8	VCC	power supply	3.3V output
9	GND	Ground	Ground
10	GND	Ground	Ground

Warning

The board supports TP screens connected to the I2C interface. Please confirm whether the touch screen interface is I2C or USB before connecting.
The I2C, RST, and INT levels in the interface are 3.3V. If you connect a 1.8V touch screen, you need to do a good job of level conversion.
Before connecting, please pay attention to whether the electrical definition of the line sequence matches. The touch screen must be connected before powering on. It is not allowed to plug and unplug with power on.

3.2.7 MIPI interface (40pin/0.5mm)

(1) Functional description:

The board supports TP screen connected to I2C interface, and the interface is in the form of 10pin 0.5mm pitch vertical FPC socket.

(2) Electrical definition:

Serial number	definition	property	describe
1	VDD_1V8	power supply	1.8V input
2	VDD_3V3	power supply	3.3V input
3	VDD_3V3	power supply
4	NC	NC	NC
5	Reset	Output	Screen reset signal, high level 3.3V
6	NC	NC	NC
7	GND	Ground	Ground
8	MIPI_D0N	Output	MIPI Port Lane 0 negative output
9	MIPI_D0P	Output	MIPI Port Lane 0 positive output
10	GND	Ground	Ground
11	MIPI_D1N	Output	MIPI Port Lane 1 negative output
12	MIPI_D1P	Output	MIPI Port Lane 1 positive output
13	GND	Ground	Ground
14	MIPI_CKN	Output	MIPI Port clock negative output
15	MIPI_CKP	Output	MIPI Port clock positive output
16	GND	Ground	Ground
17	MIPI_D2N	Output	MIPI Port Lane 2 negative output
18	MIPI_D2P	Output	MIPI Port Lane 2 positive output
19	GND	Ground	Ground
20	MIPI_D3N	Output	MIPI Port Lane 3 negative output
21	MIPI_D3P	Output	MIPI Port Lane 3 positive output
22	GND	Ground	Ground
23	NC	NC	NC
24	NC	NC	NC
25	GND	Ground	Ground
26	NC	NC	NC
27	NC	NC	NC
28	NC	NC	NC
29	NC	NC	NC
30	GND	Ground	Ground
31	LED-	power supply	LCD Backlight Power Supply -
32	LED-	power supply
33	NC	NC	NC
34	NC	NC	NC
35	NC	NC	NC
36	NC	NC	NC
37	NC	NC	NC
38	NC	NC	NC
39	LED+	power supply	LCD Backlight Power Supply +
40	LED+	power supply

Warning

The default current setting is 40mA.

3.2.8 MIPI Camera Interface (22pin/0.5mm)

(1) Functional description:

The board supports 1-way mipi camera input, and the interface is a 22-pin 0.5mm pitch vertical FPC socket.

(2) Electrical definition:

Serial number	definition	property	describe
1	GND	Ground	Ground
2	D0N	Input/Output	mipi data channel 0 negative
3	D0P	Input/Output	mipi data channel 0 positive
4	GND	Ground	Ground
5	D1N	Input/Output	mipi data channel 1 negative
6	D1P	Input/Output	mipi data channel 1 positive
7	GND	Ground	Ground
8	CLKN	Input/Output	mipi clock channel negative
9	CLKP	Input/Output	mipi clock channel positive
10	GND	Ground	Ground
11	D2N	Input/Output	mipi data channel 2 negative
12	D2P	Input/Output	mipi data channel 2 positive
13	GND	Ground	Ground
14	D3N	Input/Output	mipi data channel 3 negative
15	D3P	Input/Output	mipi data channel 3 positive
16	GND	Ground	Ground
17	PWREN	Output	Power-on control
18	GPIO	Output	Reserved IO, undefined
19	GND	Ground	Ground
20	SCL	Output	SCL signal
21	SDA	Input/Output	SDA signal
22	VDD	power supply	3.3V output

Warning

The maximum supported resolution is: 940W.
The signal level of I2C and RST in the interface is 1.8V. If you connect a module with a 3.3V level, you need to do a good job of level conversion.
Before connecting, please pay attention to whether the electrical definition of the line sequence matches. You need to connect the module first and then power it on. It is not allowed to plug and unplug it while it is powered on.

3.2.9 EDP interface (30pin/0.5mm, back)

(1) Functional description:

Supports the interface for accessing the EDP screen, the interface is in the form of a 30pin 0.5mm pitch FPC socket.

(2) Electrical definition:

Serial number	definition	property	describe
1	NC	--	Alley-oop
2	GND	Ground	Ground
3	D1-	Output	Display Port Lane 1 negative output
4	D1+	Output	Display Port Lane 1 positive output interrupted
5	GND	Ground	Ground
6	D0+	Output	Display Port Lane 0 negative output
7	D0-	Output	Display Port Lane 0 positive output
8	GND	Ground	Ground
9	AUX+	Output	Display Port AUX+ chanenl positive singal
10	AUX-	Output	Display Port AUX- chanenl negative singal
11	GND	Ground	Ground
12	PVCC	power supply	eDP LCD screen power output 3.3V
13	PVCC	power supply	eDP LCD screen power output 3.3V
14	NC	-	Alley-oop
15	GND	Ground	Ground
16	GND	Ground	Ground
17	eDP_HPD	enter	Screen hot-swap detection signal, screen output
18	GND	Ground	Ground
19	GND	Ground	Ground
20	GND	Ground	Ground
21	GND	Ground	Ground
22	BL-EN	Output	Backlight enable control
23	BL-PWM	Output	Backlight brightness pwm control
24	NC	--	Alley-oop
25	NC	--	Alley-oop
26	VLED	power supply	5V output
27	VLED	power supply	5V output
28	VLED	power supply	5V output
29	VLED	power supply	5V output
30	NC	--	Alley-oop

3.2.10 IO interface (40pin/2.54mm)

(1) Functional description:

IO is used to provide control signal input/output to peripherals. The voltage level is 3.3V. IO can be connected to Raspberry Pi peripherals.

(2) Electrical definition:

Serial number	definition	property	describe
1	3V3	power supply	3.3V output
2	5V	power supply	5V output
3	SDA	Input/Output	I2C3_SDA signal
4	5V	power supply	5V output
5	SCL	Input/Output	I2C3_SCL signal
6	GND	Ground	Ground
7	GPIO	Input/Output	GPIO4_D2
8	TX	Output	TTL-TX3
9	GND	Ground	Ground
10	RX	enter	TTL-RX3
11	GPIO	Input/Output	GPIO1_B0
12	GPIO	Input/Output	IO_PWM0_M0
13	GPIO	Input/Output	GPIO1_B1
14	GND	Ground	Ground
15	GPIO	Input/Output	GPIO0_A1
16	GPIO	Input/Output	GPIO1_B2
17	3V3	Output	3.3V output
18	GPIO	Input/Output	GPIO2_D7
19	MOSI	enter	SPI_MOSI signal
20	GND	Ground	Ground
21	MISO	Output	SPI_MISO signal
22	GPIO	Input/Output	GPIO3_B1
23	SCLK	Output	SPI_CLK signal
24	CE0	Output	SPI_CS0 signal
25	GND	Ground	Ground
26	CE1	Output	SPI_CS1 signal
27	GPIO	Input/Output	I2C5_SDA
28	GPIO	Input/Output	I2C5_SCL
29	GPIO	Input/Output	GPIO0_C5
30	GND	Ground	Ground
31	GPIO	Input/Output	IO1_5
32	PWM0	Output	PWM signal
33	PWM1	Output	PWM signal
34	GND	Ground	Ground
35	GPIO	Input/Output	IO1_1
36	GPIO	Input/Output	GPIO3_C5
37	GPIO	Input/Output	IO1_2
38	GPIO	Input/Output	IO1_3
39	GND	Ground	Ground
40	GPIO	Input/Output	IO1_4

Warning

The IO level of the peripheral device cannot be higher than 3.3V. If the IO level of the docking device is higher than 3.3V, an isolation circuit or a level conversion circuit is required, otherwise the main control and the device will be burned out;
When using the IO port, pay attention to whether the IO port is input or output;
Pay attention to the serial power supply of the peripheral device through this IO port (when the power is off, use a multimeter to measure this IO, it should be 0V).

3.2.11 POE interface (2pin/2.0mmX2 pin)

(1) Functional description:

This interface can be connected to an external POE board.

(2) Electrical definition:

Serial number	definition	property	describe
1	GND1（3-6）	enter	Common tap of RJ45_pair3-6
2	48V1（1-2）	enter	Common tap of RJ45_pair1-2
3	GND2（7-8）	enter	Common tap of RJ45_pair7-8
4	48V2（4-5）	enter	Common tap of RJ45_pair4-5

Warning

There are standard POE and non-standard POE in the POE power supply market (the difference is that the standard POE power supply uses 1-2-3-6 four-cores to transmit data and current at the same time; non-standard POE uses 1-2-3-6 to transmit data and 4-5-7-8 to transmit current). If you choose a non-standard POE module, it cannot be adapted to the switch power supply equipment of the standard POE; if you choose a standard POE module, you can adapt to the power supply input of the non-standard POE;
It is recommended that the external POE module should support the IEEE802.3af/at standard. You can ask FAE for the corresponding model specifications;
The board supports a maximum power input of 30W. If the board has many external high-power peripherals, it is recommended to draw power from the DC socket.

3.3 Other standard interfaces and functions

interface	standard	Parameter Description
Storage Interface	TF card	Adopts SD3.0 interface specification, supports up to Class10,minimum write/read speed is 10MB/s, and the maximum capacity can support 128GB
Storage Interface	USB TYPE-A	USB 2.0, supports up to 480Mbps/s transfer rate (60MB/s) USB 3.0, supports up to 5.0Gbps/s transfer rate (500MB/s)
Ethernet interface	RJ45 connector	Support 10/100/1000M wired network
HDMI interface	HDMI TYPE-A	HDMI 1.4, 2.0; supports multiple resolutions, 1920x1080, 1280x720, 720x576, 720x480, etc.
Headphone jack	3.5mm	Support left and right dual channels, support MIC recording

Chapter 4 Electrical Performance

project		Minimum	typical	maximum
Power parameters	Voltage	--	5V	--
	Ripple	--	--	50mV
	Current	3A
Power supply current (HDMI output, no other peripherals connected)	Working current		500mA	1200mA
	Standby current		300mA	450mA
Total output	Current	--	--	3A
environment	Relative humidity	--	--	80%
	Operating temperature	0℃	--	60℃
	Storage temperature	-40℃		80℃

Chapter 5 Minimum Test Items for the Whole Machine

Description:

Minimum test items for overall stability and reliability
Serial number	Test items	Test Detailed Description
1	Basic functional performance test	Test the main functional performance of the whole machine, test WiFI, Bluetooth, Ethernet, USB, serial port, video playback and other functions
2	Software upgrade function test	Verify the upgrade function of the whole product, and test whether the product line flash, USB flash drive upgrade, and network remote upgrade functions are normal.
3	High temperature aging test	Test the high temperature resistance of the whole machine. After playing the aging work video in a 60℃ environment for 3 days, it can run normally without freezing, abnormal picture, black screen and other electrical problems.
4	Low temperature power failure test	Test the low temperature resistance of the whole machine. After playing the aging work video in a 0℃ environment for 3 days, it can run normally without freezing, abnormal picture, black screen and other electrical problems.
5	Short-time timing switch at room temperature	Test the product's ability to withstand power on and off, program it to shut down in 3 minutes and start up in 7 minutes, and run normally after 7 days of operation without electrical failures such as freezing, abnormal images, black screen, etc. The probability of abnormal records does not exceed 4/10000.
6	Electrostatic Discharge (ESD) Test	The simulation test evaluates the product's ability to defend against electrostatic discharge. According to the IEC 61000-4-2 test standard, the product is subjected to ±4KV contact and ±8KV air discharge. The product must meet the A or B level judgment to be accepted. C and D levels are considered unqualified.
7	Sweep frequency vibration test	Test the product's vibration resistance to see if it has passed the simulated transportation test and the board solder and parts' bearing capacity to avoid potential problems. Use a vibration tester to test the product. After the test, if the test product has no looseness or fall-off in structure and can operate normally, and has no electrical defects such as freezing, abnormal picture, black screen, and structural appearance damage, it is judged as OK.
8	Free drop test	The simulated transport and handling product's ability to withstand a drop is used to determine the bearing capacity of the machine mechanism to avoid potential problems and improve the design and process. After the test is completed, the test product can operate normally without freezing, abnormal images, black screens, and other electrical defects and structural appearance damage. It is judged to be OK
9	Short-time power-off shock at room temperature	This test is used to test the product's ability to withstand power on and off.
10	Normal temperature long time timer switch	Verify the stability of the MCU and the stability of the system. The timer power on/off tool is set to start at 9:30 am and shut down at 18:30. The log records the time interval between each startup and shutdown. If the error is less than 1 minute, it is considered qualified.
11	Voltage overvoltage and undervoltage test	According to the power supply specifications of the Android board, the voltage tolerance of the board is tested through voltage changes. The whole machine is tested for 2 hours at -20% +30% of the rated power supply. During and after the test, if the test product can operate normally without freezing, abnormal images, black screen and other electrical problems, it is judged as OK.

Chapter 6 Configurable Parameters Table (Differences)

BOARD_19

Chapter 7 Precautions for use (must read)

BOARD_20

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