Technical data

4.12.1 SIM Detection (SIMDET)
SIMDET is used to determine whether a SIM card has been inserted into or removed
from the SIM card holder. The integrator should normally wire it to the ‘card inserted
switch’ of the SIM card holder, but different implementations are possible.
An internal pull-up resistor keeps the SIMDET-signal at a high level (1.8V) when left
open. This means ‘SIM card missing’ to the Wireless CPU®. When pulled low the
radio device assumes a SIM card is inserted. SIMDET is a Digital IO signal input with
characteristics defined in section
4.3.
It is possible to use the external SIM even if SIMDET is not set low. If a
SIM is inserted in the SIM-holder external to the Wireless CPU®, the
application can send AT*ESSE=1 and the Wireless CPU® will switch to
the external SIM regardless of the status of SIMDET.
NOTE
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable
GR64 Integrators’ Manual
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