Specifications

Chapter 3 – Electrical Characteristics
Wireless ModemModule GSM/GPRS Developer’s Guide 31
Table 3-24: SIM Interface Electrical Characteristics
Parameter Conditions Min Typ Max Unit
SIMDATA V
IH
I
IH
= +/- 20µA
0.7xSIMVCC V
SIMDATA V
IL
I
IL
= 1 mA 0.3xSIMVCC V
SIMRST,
SIMDATA
SIMCLK V
OH
Source current
= 20µA
SIMVCC – 0.1V V
SIMRST,
SIMDATA
SIMCLK V
OL
Sink current
= -200µA
0.1
SIMVCC Output
Voltage
I
SIMVCC
<= 6mA 2.70 2.80 2.85 V
SIMCLK Rise/Fall
Time
Loaded with
30pF
50 ns
SIMRST,
SIMDATA
Rise/Fall Time
Loaded with
30pF
1
µs
SIMCLK
Frequency
Loaded with
30pF
3.25 MHz
Table 3-25: SIM Socket Pin Description
Signal Pin Number Description
Vcc 1 SIMVCC
RST 2 SIMRST
CLK 3 SIMCLK
CC4 4 R10 to Ground
GND 5 Ground
VPP 6 not connected
I/O 7 SIMDATA
CC8 8 SIMPRES1