14
2.2.2.2.
JCOM1
Description
Pin Pin
Description
N/C
1
2
RS-232_RX
RS-232_TX
3
4
N/C
GND
5
6
N/C
N/C
7
8
N/C
N/C
9
10
N/C
2.2.2.3.
JDC in
Description
Pin
GND
1
5V
2
2.2.2.4.
JEMBUX
Description
Pin Pin
Description
3.3V
2
1
5V
3.3V
4
3
5V
GPIO0
6
5
GND
GPIO1
8
7
MCU_SS
GPIO2
10
9
MCU_CLK
GPIO3
12
11
MCU_MOSI
GPIO4
14
13
MCU_MISO
GPIO5
16
15
GND
GPIO6
18
17
I2C CLK
N/C
20
19
I2C DAT
Remark:
Match connector: DF13-20DS-1.25C
GPIO pin control by MCU (level 3.3V)
MCU_SS: SPI Slave Select (active low, output from master)
MCU_CLK: SPI Serial Clock (output from master)
MCU_MOSI: SPI Master Output, Slave Input (output from master)
MCU_MISO: Master Input, Slave Output (output from slave)
