User guide

M80 EVB User Guide
M80_EVB_User_Guide_V1.2 - 28 -
Figure 27: Auxiliary UART port and Debug Port
Table 11: Pins of Auxiliary UART
Note: The above pins are RS232 voltage level.
Table 12: Pins of debug UART
Note: The above pins are RS232 voltage level.
The TTL level of UART signal can be test through the test points below. Customer can use these
test points to verify the design between customer device and the module.
Pin
Signal
I/O
Description
Note
1_2
TXD_AUX
O
Transmit data
1_3
RXD_AUX
I
Receive data
1_5
GND
Ground
Pin
Signal
I/O
Description
Note
2_2
DBG_TXD
O
Transmit data
2_3
DBG_RXD
I
Receive data
2_5
GND
Ground
1_2
1_3
1_5
2_2
2_3
2_5
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