Fibocom SU806 Series User Manual

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FIBOCOM SU806 Series Hardware Guide Page 35 of 91
3.4 UART
SU806 series module defines three UART ports，all are 1.8V voltage domain ,the function of UART2 has
not achieve at present. Its pin definition is shown in the following table:
Table 3-8 UART interface pin definition
Pin Name
Pin Number
I/O
Description
Note
UART0_TX
34
DO
UART0 data transmission
-
UART0_RX
35
DI
UART0 data reception
-
UART0_CTS
36
DI
UART0 clear to send
-
UART0_RTS
37
DO
UART0 request to send
-
UART1_TX
94
DO
UART1 data transmission
Debug_UART serial port by
default
UART1_RX
93
DI
UART1 data reception
UART2_TX
226
DO
UART2 data transmission
Reserved
UART2_RX
225
DI
UART2 data reception
Reserved
Note:
Please do not pull down UART1_TX before module power on, otherwise module will not be
powered on normally.
All series ports are 1.8V voltage domain, if the peripheral is other voltage domain, please add
level shift.
Level shift reference design is show in the following figure:

Fibocom SU806 Series Specifications

General

Brand	Fibocom
Model	SU806 Series
Category	Computer Hardware
Language	English