Product Info

SC200L Hardware Design
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3.9. UART Interfaces
SC200L provides two UART interfaces:
 UART0: 4-wire UART interface, hardware flow control supported.
 UART1（DEBUG）: 2-wire UART interface; used for debugging by default.
The UART interface pin definition is as follows:
Table 10: Pin Definition of UART Interfaces
UART0 is a 4-wire UART interface with 1.85V power domain. A level translator should be used if
customers’ application is equipped with a 3.3V UART interface.
Figure 12: Reference Circuit with Level Translator Chip (for UART5)
The following figure is an example of a connection between SC200L and PC. A voltage level translator
and an RS-232 level translator chip are also recommended to be added between the module and PC. The
Pin Name Pin No I/O Description Comment
UART0_TXD 34 DO UART0 transmit data
1.8V power domain.
If unused, keep it open.
UART0_RXD 35 DI UART0 receive data
UART0_CTS 36 DI UART0 clear to send
UART0_RTS 37 DO UART0 request to send
DBG_RXD 93 DI
UART1 receive data.
Debug port by default.
DBG_TXD 94 DO
UART2 transmit data.
Debug port by default.