User's Manual

H350 LGA Serials Module Hardware User Manual Page of
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UART2 support MUX as SPI interface.
UART1 and UART2 signal description:
UART1
Pin# Pin Name I/O Description
12 UART1_RI O UART1 Ring Indicator
56 UART1_DSR I UART1 DTE Ready
55 UART1_DTR O UART1 DCE Ready
57 UART1_DCD O UART1 Carrier Detect
10 UART1_CTS I UART1 Clear to send
11 UART1_RTS O UART1 Request to send
8 UART1_TXD O UART1 Transmitted Data
9 UART1_RXD I UART1 Received Data
UART2
Pin# Pin Name I/O Description
50 UART2_RXD I UART2 Transmitted Data
51 UART2_TXD O UART2 Received Data
5.5.2 UART Design
The following table show the signal direction when H350 wireless communication module (DCE) UART1
connects to PC (DTE):
Application MCU(DTE) Signal Direction H350 Module (DCE)
RXD UART1_TXD
TXD UART1_RXD
RTS UART1_CTS
CTS UART1_RTS
DSR UART1_DTR
DTR UART1_DSR