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Introducing the R21, an advanced industrial general-purpose solution designed to enhance the capabilities of the Raspberry Pi Zero. By seamlessly integrating the Pi Zero and its 40-pin GPIO header onto the carrier board, the R21 provides a robust foundation for expanded functionality.
Unlocking new possibilities, the R21 features a PCIe-based M.2 Key M slot, offering reliable and high-speed solid-state storage to elevate the performance of the Pi Zero. Powering the R21 is a breeze, thanks to compatibility with a 6-15V DC power supply equipped with a barrel jack connector, or the optional Power over Ethernet (PoE) PD.
The R21 redirects the Pi Zero's USB ports, which should not be used independently. These ports are directly linked to the board, serving different functions. Additionally, specific pins from the 40-pin header are allocated for proprietary functions. This rerouting is achieved through solder connection to the Pi Zero test points.
| Description | R20.1 | R21 | Note |
|---|---|---|---|
| Version | Changes |
|---|---|
| Version | Changes |
|---|---|
| Version | Changes |
|---|---|
| SKU | Product |
|---|---|
| SKU | Product |
|---|---|
1.0
Initial release
38620-1
Engineering prototype
38626-1
Engineering prototype
70902
R20.1 full fledged system PI Zero Industrial platform
70905
R20 Embedded PI Zero Industrial platform
70903
R21 PI Zero Industrial platform
70906
R21 Embedded PI Zero Industrial platform
Size
125mm x 62.5mm
125mm x 62.5mm
Compatible Modules
Raspberry Pi Zero v1.3
Raspberry Pi Zero v1.3
Power Input
12V nominal (6-15V), 5.5/2.5mm barrel jack
12V nominal (6-15V), 5.5/2.5mm barrel jack
Power Protection
overvolt protection, reverse voltage protection
overvolt protection, reverse voltage protection
USB
USB 2.0:
1x USB-C
1x RJ45
1x LTE
1x USB to PCIe
USB 2.0:
1x USB-C
1x USB-A
1x LTE
1x USB to PCIe
Micro SD Card
1x on Raspberry PI
1x on Raspberry PI
HDMI
1x mini HDMI on Raspberry PI
1x mini HDMI on Raspberry PI
Ethernet / PoE
yes:
Gigabit RJ45 / 10 watt
yes:
Gigabit RJ45 / 10 watt
PoE Class 3
M.2 Key M (NVMe)
2242, 1x NVME (PCIe x2)
2242, 1x NVME (PCIe x2)
M.2 Key B
3042, for LTE/5G (with dual Nano SIM)
3042, for LTE/5G (with dual Nano SIM)
GPIO
40 pin
40 pin
Service Port
yes: RJ45 connector
no
To be added
Detailed pinout description of all possible connectors a given board offers, please check the overview page what your specific carrier board is populated with.
| Pin | Description | Note |
|---|---|---|
Recommended Power Supply:
Standard ETH out
PoE-PD Class 3 (Powered Device)
Only USB-2 and 5V Power out connected
please do not use already used pins for your application
This M.2 Connector exposes 2 Sim card slots for the LTE module (Second SIM card slot only supported, if the LTE module supports dual sim)
Standard pinout (only USB 2.0)
| Pin | Description | Socket pin | Note |
|---|---|---|---|
| Pin | Description | Note |
|---|---|---|
| Pin | Description | Note |
|---|---|---|
1
3.3V
VDC Power
2
5V
VDC Power
3
SDA1_I2C
Carrierboard EEPROM
4
5V
VDC Power
5
SCL1_I2C
Carrierboard EEPROM
6
GND
7
GPIO4
8
UART_TXD
9
GND
10
UART_RXD
11
GPIO17
LTE M.2 enable signal
12
GPIO18
13
GPIO27
14
GND
15
GPIO22
16
GPIO23
17
3.3V
VDC Power
18
GPIO24
USB enable signal
19
MOSI_SPI0
20
GND
21
MISO_SPI0
22
GPIO25
23
SCLK_SPI0
24
CE0_SPI0
25
GND
26
CE1_SPI0
27
SDA0_I2C
28
SCL0_I2C
29
GPIO5
30
GND
31
GPIO6
32
GPIO12
33
GPIO13
RGB LED - Green
34
GND
35
GPIO19
RGB LED - Red
36
GPIO16
USB-HUB enable signal
37
GPIO26
RGB LED - Blue
38
GPIO20
39
GND
40
GPIO21
USB to PCIe enable signal
1
12V_PWR
6-15V
2
GND
Ground
1
Vin
5V
2
D-
USB 2.0
3
D+
USB 2.0
4
GND
Ground
1
D+
USB 2.0
2
D-
USB 2.0
3
TX_Jetson
UART0 Jetson (PI usb -> USB to UART -> Jetson)
4
RX_Jetson
UART1 Jetson (PI UART -> Jetson)
5
TX_Jetson
UART1 Jetson (PI UART -> Jetson)
6
RX_Jetson
UART0 Jetson (PI usb -> USB to UART -> Jetson)
7
12V_PWR
12V
8
GND
Ground
