MeiG_SLM156_Hardware Design Manual
MeiG Smart Technology Co., Ltd
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3.11.1 UART Pin Description
Table 10 UART1 pin description
Pin name
Pin number
I/O
Description
Note
UART_RX
41
DI
Module receives data
1.8V power domain
UART_TX
40
DO
Module sends data
1.8V power domain
UART_CTS
43
DO
Module clears
sending
If unused, keep it
open
UART_RTS
42
DI
DTE asks to send
data
If unused, keep it
open
Table 11 Pin description of debugging interface
Pin name
Pin number
I/O
Description
Note
DBG_RX
37
DI
Module
receives data
1.8V power
domain
DBG_TX
36
DO
Module sends
data
1.8V power
domain
Table 12 Logical level of interface
Parameter
Min
Max
Unit
VIL
-0.3
0.6
V
VIH
1.2
2.0
V
VOL
0
0.45
V
VOH
1.35
1.8
V
