HP module EVK hardware user guide – XM112, XB112
,
LH112
Page 22 of 41
© 2018 by Acconeer – All rights reserved
2022-08-25
3.1.6.6 2x5 pin header (J6)
The 2x5 pin header (1.27mm pitch) contains miscellaneous 1.8V signals from the XM112. The pinout
is found in Table 7.
Table 7. The pinout of J6.
Pin Number
Signal
Pin Number
Signal
1
1.8V
2
I2C_SCL
3
MCU_INT
4
I2C_SDA
5
MCU_GPIO
6
UART4_TXRX
2
7
UART2_RXTX
2
8
UART4_RXTX
2
9
UART2_TXRX
2
10
GND
3.1.7 Buttons
There are two buttons on the XB112. J7 controls the signal “ERASE” from XM112 and J8 controls
“NRST” from the XM112. In Table 8 the state of the buttons and the corresponding signal states are
listed.
Table 8. The states of the buttons J7 and J8.
Button
Open (default)
Closed
J7
ERASE=0
ERASE=1
J8
NRST=1
NRST=0
