User Manual

GM47/48 Technical description

BA/SEM/MS 02:0004 Rev B

3.11.1 SIM Detection – SIM Presence

SIMDETECT is an input intended to be used to determine whether a

SIM card has been inserted or removed in the external SIM card

holder. It shall be normally wired to the "Card Inserted Switch" of the

external SIM card holder, but different implementation could be

handled.

On having High level it will mean, "SIM card missing". While pulled

down to Low the module shall understand it as "SIM card inserted".

SIMDETECT is Dig. 2.75 CMOS input and general characteristics are

applicable.

Parameter Min. Typ. Max. Units

Pull-up resistance (at 2.75 V) 100

kΩ

Low Level Input Voltage (SIM inserted) 0.8 V

High Level Input Voltage (SIM missing) 1.93 5 V

3.12 Service/Programming

Pin Signal Description

58 SERVICE Flash programming voltage

This input shall be used as a programming voltage for the Flash

Memories to initiate and speed up the programming process, or a

signal to indicate the module a logging process.

Mode

SERVICE Voltage (V)

Drive Capacity

Mode SERVICE Voltage (V) Drive Capacity

Min. Typ. Max.

Normal Operation 0.8 -

Service/enable programming 1.9 2.75 3.6 > 1 mA

Fast programming 11.4 12.6 > 60 mA

Absolute maximum voltage 13.5 -

The maximum accumulated time allowed with Programming voltage

applied shall be 80 h. over the lifetime of the module.