M20 EVB User Guide
3.8.2 J2 test points
Figure 14: J2 test points
Table 11: Pins of J2
Pin Signal I/O Description
1 DTR0 I
For measurement of the battery
temperature
2 RXD0 I Receive data of Serial Port 0
3 Reserve
4 TXD0 O Transmit data of Serial Port 0
5 RI0 O Ring indicator of Serial Port 0
6 CTS0 O Clear to send of Serial Port 0
7 GND Digital ground
8 RTS0 I Request to send of Serial Port 0
9 GND Digital ground
10 DCD0 O Data carrier detection of Serial Port 0
M20_EVB_UGD_V1.01 - 20 -
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