Sim-Card And Display - Siemens A35 Repair Documentation

8.3 SIM-Card- and Display Connector
Notes
The SIM-CARD is supplied at pin2 with CCVCC. To get CCVCC (2,9V) the
ASIC D200 pin12 is used to switch 2,9V pin 14 to pin 13with the EGOLD+
(SIM L18)
signal CCVZQ. If no SIM-CARD is connected the EGOLD+ tries 3 times to connect
the SIM-CARD. After this time the EGOLD+ stops trying.
That means, if the EGOLD+ is losing the connection while normal operation of the
mobile phone, the mobile must be switched off and on again.
The communication between the EGOLD+ and the SIM-CARD is done via the CCIO
pin5 by using CCCLK pin6 as a clock signal.
The diode V351 is used to protect CCCLK and CCIO versus switching peaks.
from/to EGOLD+
The display is provided with 2,65V from the ASIC D200. The communication with the
EGOLD+ is realised via the serial signals SCL and SI
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A35-A36-A40 Company Confidential 09/01