User's Manual

GSM/GPRS Module Series
M35 User Manual
M35_User_Manual Confidential / Released 22 / 85
SIM1_
DATA
29
I/O
SIM1 data
VOLmax=
0.15×SIM1_VDD
VOHmin=
0.85×SIM1_VDD
pad to SIM card
holder.
SIM1_
RST
28
O
SIM1 reset
VOLmax=
0.15×SIM1_VDD
VOHmin=
0.85×SIM1_VDD
SIM1_
PRESENCE
20
I
SIM1 card detection.
VILmin=0V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
VDD_EXT+0.2
SIM_
GND
31
SIM ground
SIM2_
VDD
18
O
Power supply for SIM2
card
The voltage can be
selected by software
automatically. Either
1.8V or 3V.
SIM2_
CLK
17
O
SIM2 clock
VOLmax=
0.15×SIM2_VDD
VOHmin=
0.85×SIM2_VDD
SIM2_
DATA
16
I/O
SIM2 data
VOLmax=
0.15×SIM2_VDD
VOHmin=
0.85×SIM2_VDD
SIM2_
RST
25
O
SIM2 reset
VOLmax=
0.15×SIM2_VDD
VOHmin=
0.85×SIM2_VDD
RF Interface
PIN NAME
PIN NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
RF_ANT
39
I/O
RF antenna pad
Impedance of 50Ω
PCM Interface
PIN NAME
PIN NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT