Quectel SC262R Series User Manual

Smart Module Series
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3.10. UART Interfaces
SC200R series module provides three UART interfaces and supports up to 4 Mbps:
⚫ UART5: 4-wire UART interface, and hardware flow control is supported
⚫ UART2 (debug UART): 2-wire UART interface, used for debugging by default
⚫ UART1: 2-wire UART interface
Table 14: Pin Definition of UART Interfaces
UART5 is a 4-wire UART interface with 1.8 V power domain. You should use a level translator if your
application is equipped with a 3.3 V UART interface. The following figure shows the reference design.
VCCA VCCB
OE
A1
A2
A3
A4
GND
B1
B2
B3
B4
LDO5_1V8
UART5_RTS
UART5_RXD
UART5_CTS
UART5_TXD
RTS_3.3V
RXD_3.3V
CTS_3.3V
TXD_3.3V
VDD_3.3V
C1
100 pF
C2
U1
100 pF
Figure 13: Reference Circuit with Level Translator Chip (for UART5)
Pin Name
Pin No.
I/O
Description
Comment
UART5_TXD
34
DO
UART5 transmit
1.8 V power domain.
If not used, keep these pins
open.
UART5_RXD
35
DI
UART5 receive
UART5_CTS
36
DI
UART5 clear to send
UART5_RTS
37
DO
UART5 request to send
DBG_RXD
93
DI
UART2 receive
(debug UART by default)
DBG_TXD
94
DO
UART2 transmit
(debug UART by default)
UART1_RXD
153
DI
UART1 receive
UART1_TXD
154
DO
UART1 transmit

Quectel SC262R Series Specifications

General

Brand	Quectel
Model	SC262R Series
Category	Control Unit
Language	English