Quectel RG255C-GL Hardware Design page 17

14 USIM_RST
15 GND
16 RESERVED
17 RI
18 GND
19 RESERVED
20 W_DISABLE#
21 GND
22 PERST#
23 CTS
24 RESERVED
25 RTS
26 GND
27 GND
28 NC
29 GND
30 I2C_SCL
31 DTR
32 I2C_SDA
33 RESERVED
34 GND
35 GND
RG255C-GL_Mini_PCIe_Hardware_Design
DO (U)SIM card reset
Ground
Reserved
DO Ring indication
Ground
Reserved
DI Airplane mode control
Ground
DI Fundamental reset
Clear to send signal to
DI
the module
Reserved
Request to send signal
DO
from the module
Ground
Ground
Not connected
Ground
I2C serial clock
DO
(for external codec)
DI Sleep mode control
I2C serial data
DIO
(for external codec)
Reserved
Ground
Ground
5G Module Series
USIM_VDD
3.3 V
Pulled up by
3.3 V default.
Active low.
Pulled up by
3.3 V default.
Active low.
3.3 V
3.3 V
Requires
1.8 V external pull-up
to 1.8 V.
3.3 V
Requires
1.8 V external pull-up
to 1.8 V.
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