Quectel RG255C-GL - Page 18

5G Module Series
RG255C-GL_Mini_PCIe_Hardware_Design 17 / 57
36
USB_DM
AIO
USB 2.0 differential data
(-)
Requires
differential
impedance of
90 Ω.
A Test point
must be
reserved.
37
GND
Ground
38
USB_DP
AIO
USB 2.0 differential data
(+)
Requires
differential
impedance of
90 Ω.
A Test point
must be
reserved.
39
VCC_3V3
PI
Power supply for the
module
Vmin = 3.0 V
Vnom = 3.3 V
Vmax = 3.6 V
40
GND
Ground
41
VCC_3V3
PI
Power supply for the
module
Vmin = 3.0 V
Vnom = 3.3 V
Vmax = 3.6 V
42
LED_WWAN#
OC
LED signal for indicating
the network status of the
module
Active low.
43
GND
Ground
44
USIM_DET
DI
(U)SIM card hot-plug
detect
1.8 V
45
PCM_CLK*
DIO
PCM clock
1.8 V
46
RESERVED
Reserved
47
PCM_DOUT*
DO
PCM data output
1.8 V
48
NC
Not connected
49
PCM_DIN*
DI
PCM data input
1.8 V
50
GND
Ground
51
PCM_SYNC*
DIO
PCM data frame sync
1.8 V