CLM920_AC3 Module Hardware Usage Guide
Shanghai Yuge Information Technology co., LTD
- 12 -
60
VBAT_BB
PI
Module baseband power input
7
VDD_EXT
PO
1.8V voltage output
Can
provide
pull-up for external
GPIO (maximum
50MA),
please
keep left floating
8~10,19,22,
36,46,48,50
~54,56,72
GND
Ground
85~112
GND
Heat sink pad
Module switch machine and reset
Pin
Definition
IO
Functional description
Remarks
21
PWRKEY
DI
Switching machine pin
Default low active
20
RESET_N
DI
Module reset pin, internally
pulled up to VDD_EXT
Low level reset
module
USB interface
Pin
Definition
IO
Functional description
Remarks
71
USB_VBUS
PI
USB insertion detection
69
USB_D+
IO
USB bus differential positive
signal
90
Ω
differential
impedance
70
USB_D-
IO
USB bus differential negative
signal
90
Ω
differential
impedance
Main serial port
Pin
Definition
IO
Functional description
Remarks
62
RI
DO Ringing prompt
Wake up the host,
please keep it
floating when not in
use
63
DCD
DO Carrier detection
1.8V, please hang
when not in use
64
CTS
DO Clear send
1.8V, please hang
when not in use