CLM920_AC3 Module Hardware Usage Guide
Shanghai Yuge Information Technology co., LTD
- 13 -
65
RTS
DI
Request to send
1.8V, please hang
when not in use
67
TXD
DO Main serial port data
transmission
1.8V, please hang
when not in use
68
RXD
DI
Main serial data reception
1.8V, please hang
when not in use
Debug serial port
Pin
Definition
IO
Functional description
Remarks
11
DBG_RXD
DI
Debug
serial
port
data
reception
1.8V, please hang
when not in use
12
DBG_TXD
DO
Debug
serial
port
data
transmission
1.8V, please hang
when not in use
USIM interface
Pin
Definition
IO
Functional description
Remarks
13
SIM_PRESEN
CE
DI
USIM card hot plug detection
please hang when
not in use
14
USIM_VDD
PO
USIM card power supply
Automatically
recognize 1.8V or
3V USIM cards
15
USIM_DATA
IO
USIM card data signal line
16
USIM_CLK
DO USIM card clock signal line
17
USIM_RST
DO USIM card reset signal line
GPIO pin
Pin
Definition
IO
Functional description
Remarks
1
WAKEUP_IN
DI
External device wake-up
module
1.8V voltage
domain
2
AP_READY
DO Wake up external devices
Reserved
4
W_DISABLE#
DI
Flight mode control
Pin function is
under development
(floating when not
in use)
Module status indication interface