Integrator's Manual GR47/GR48

5. SYSTEM CONNECTOR INTERFACE

LZT 123 7589 R1A

5.10.1 SIM Detection - SIMPRESENCE

SIMPRESENCE is used to determine whether a SIM card has been inserted

into or removed from the SIM card holder. You should normally wire it to

the “card inserted switch” of the SIM card holder, but different

implementations are possible.

When left open, an internal pull-up resistor maintains the signal high and

means “SIM card missing” to the radio device. When pulled low the radio

device assumes a SIM card is inserted.

SIMPRESENCE is a Digital 2.75V CMOS input with the following

electrical characteristics.

1RWH To meet regulatory approvals SIMPRESENCE must be implemented.

5.11 Service/Programming

When the SERVICE input signal is active the radio device will:

• be reprogrammed if data is received through UART2 from a computer

running Sony Ericsson reprogramming software;

• or it will output logging data on UART2.

SIMDAT High Level Output

voltage (V )

3 V 2.7 3.0 V

5 V 4.7 5.0 V

SIMDAT Low Level Output

voltage (V )

3 V 0 0.2 V

5 V 0 0.2 V

SIMCLK

SIMRST

High Level Output

voltage (V )

3 V 2.4 3.0 V

5 V 4.4 5.0 V

SIMCLK

SIMRST

Low Level Output

voltage (V )

3 V 0 0.35 V

5 V 0 0.3 V

Signal Parameter Mode Min. Typ. Max. Unit

Parameter Min. Typ. Max. Units

Pull-up resistance (at 2.75 V) 100 kΩ

Low Level Input voltage (SIM inserted) 0.80 V

High Level Input voltage (SIM missing) > 1.93 2.75 V

Pin Signal Dir Description

58 SERVICE I Flash programming voltage