HP module EVK hardware user guide – XM112, XB112
,
LH112
Page 21 of 41
2022-08-25
© 2018 by Acconeer – All rights reserved
3.1.6.4 30 pin board-to-board connector (J4)
The 30-pin board-to-board connector is intended to connect the XM112 to the XB112. The pinout is
found in Table 5.
Table 5. The pinout of J4.
Pin Number
Signal
Pin Number
Signal
1
SPI_CLK
2
GND
3
GND
4
1V8
5
SPI_MOSI
6
1V8
7
GND
8
GND
9
SPI_MISO
10
MCU_GPIO
11
GND
12
UART4_TXRX
2
13
SPI_SS
14
UART4_RXTX
2
15
GND
16
ERASE
17
UART0_TXRX
2
18
NRST (SWD_NRST)
19
UART0_RXTX
2
20
SWDIO
21
GND
22
TRACESWO
23
UART2_TXRX
2
24
GND
25
UART2_RXTX
2
26
SWDCLK
27
I2C_SDA
28
GND
29
I2C_SCL
30
MCU_INT
3.1.6.5 2x5 JTAG/SWD pin header (J5)
The 2x5 JTAG/SWD pin header (1.27mm pitch) contains the signals needed for flashing the XM112
MCU via the SWD interface. The pinout matches that of the Cortex 10-pin JTAG/SWD Connector
and is found in Table 6.
Table 6. The pinout of J5.
Pin Number
Signal
Pin Number
Signal
1
1.8V
2
SWDIO
3
GND
4
SWDCLK
5
GND
6
TRACESWO
7
NC
8
NC
9
GND
10
NRST
2
The first two letters in the part of the signal name that is following the “_” character indicate the direction of
the UART on the external host. The last two letters of the signal name that is following the “_” character indicate
the direction of the UART on the XM112 MCU.
