5.11.6 SIM Card Interface
Pin |
| Name |
| Direction |
| Function | ||
|
|
|
|
|
|
|
|
|
14 |
|
|
| SIMVCC |
| Output |
| 1.8V or 3.0V SIM card supply |
15 |
|
|
| SIMRST |
| Output |
| SIM card reset signal |
16 |
|
|
| SIMCLK |
| Output |
| SIM card clock signal |
17 |
|
|
| SIMDAT |
| In/Out |
| SIM card data |
18 |
|
|
| SIMDET |
| Input |
| SIM presence detection |
This interface allows the user to communicate with the smart (SIM) card in the user application. The GS64 offers alternative arrangements for accessing the SIM depending on which variant of the GS64 is used. Both variants provide this interface through the system connector, referred to as the external or remote SIM interface to distinguish it from the integrated SIM interface.
The maximum distance between the SIM card holder and the wireless modem is 70cm. SIM holders placed further than this distance may not meet the SIM interface performance specification.
This SIM interface allows the use of 3 V and 1.8 V SIM cards. The module does not support 5V SIM cards. The wireless modem automatically detects the SIM type, switching the signal voltages accordingly. SIM voltage levels, as shown in the following table, are dependent on the type of SIM card detected by the wireless modem.
Signal
SIMVCC
SIMDAT
Parameter
SIM supply voltage
Short circuit current
Quiescent Supply Current
Output Capacitance
Output Capacitor ESR
High level input voltage (VIH)
Low level input voltage (VIL)
High level output voltage (VOH)
Low level output voltage (VOL)
Mode |
| Min |
| Typ |
| Max |
| Unit |
|
|
|
|
|
|
|
|
|
1.8V |
| 1.71 |
| 1.8 |
| 1.89 |
| V |
3.0V |
| 2.75 |
| 2.9 |
| 3.05 |
| V |
|
| 10 |
|
|
| 50 |
| mA |
3.0V |
|
|
| 20 |
|
|
| ∝A |
|
| 0.3 |
|
|
| 2 |
| ∝F |
| 0.01 |
|
| 1.0 |
| Ω | ||
1.8V |
|
|
|
|
| 0.7xSIMVCC |
| V |
3.0V |
|
|
|
|
| 0.7xSIMVCC |
| V |
1.8V |
| 0.2xSIMVCC |
|
|
|
|
| V |
3.0V | 0.4 |
|
|
|
|
| V | |
1.8V |
| 0.8xSIMVCC |
|
|
|
|
| V |
3.0V |
| 0.8xSIMVCC |
|
|
|
|
| V |
1.8V |
|
|
|
|
| 0.4 |
| V |
3.0V |
|
|
|
| 0.4 |
| V | |
LZT 123 1836 | 59 |