Data Sheet

INTERFACES
UART
GM02S DATASHEET (PRELIMINARY) PROPRIETARY 9
SEQUANS Communications
2.4 UART
GM02S, when used as a slim modem, has three UARTs available. While the
function of the UARTs can be configured, the default function for each UART
is as follows:
• UART0: data and control from external MCU via AT commands
• UART1: debug and upgrade
•UART2: modem console
In addition, a fourth UART (UART3) may be used when running applications
on GM02S.
Table 2-5: UART Signals
Pad #
Pad
Name
Primary
Function
Alternate
Function
1
Power Group
Direction
Pad type
2
State
@reset
36 GPIO12/TXD0 TXD0 GPIO12 PVDD_1V8 In/Out BIDIR HighZ,
2mA
In for primary function, UART0
34 GPIO13/RXD0 RXD0 GPIO13 PVDD_1V8 In/Out BIDIR Out-1,
2mA
Out for primary function, UART0
35 GPIO14/CTS0 CTS0 GPIO14 PVDD_1V8 In/Out BIDIR Out-1,
2mA
Out for primary function, UART0
33 RTS0 RTS0 N/A PMU_5V In IN HighZ
Wake signal enabled by default.
32 TXD1 TXD1 N/A PVDD_1V8 In BIDIR HighZ,
2mA
UART1
30 RXD1 RXD1 N/A PVDD_1V8 Out BIDIR Out-1,
2mA
UART1