Quectel RG255C-GL Hardware Design page 18

36 USB_DM
37 GND
38 USB_DP
39 VCC_3V3
40 GND
41 VCC_3V3
42 LED_WWAN#
43 GND
44 USIM_DET
45 PCM_CLK*
46 RESERVED
47 PCM_DOUT*
48 NC
49 PCM_DIN*
50 GND
51 PCM_SYNC*
RG255C-GL_Mini_PCIe_Hardware_Design
USB 2.0 differential data
AIO
(-)
Ground
USB 2.0 differential data
AIO
(+)
Power supply for the
PI
module
Ground
Power supply for the
PI
module
LED signal for indicating
OC the network status of the
module
Ground
(U)SIM card hot-plug
DI
detect
DIO PCM clock
Reserved
DO PCM data output
Not connected
DI PCM data input
Ground
DIO PCM data frame sync
5G Module Series
Requires
differential
impedance of
90 Ω.
A Test point
must be
reserved.
Requires
differential
impedance of
90 Ω.
A Test point
must be
reserved.
Vmin = 3.0 V
Vnom = 3.3 V
Vmax = 3.6 V
Vmin = 3.0 V
Vnom = 3.3 V
Vmax = 3.6 V
Active low.
1.8 V
1.8 V
1.8 V
1.8 V
1.8 V
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