User Guide

CCS Technical Documentation System Module and User Interface
Company confidential RH-23
Issue 1 02/2004 Nokia Corporation. Page 31
Table 26: DC Characteristics for ROW and COL lines
Table 27: DC Characteristics for VLED+ lines
SIM Interface
SIM card reader is located on upper block part of phone and is connected to UEM via
hinge flex. The UEM contains the SIM interface logic level shifting. The SIM interface can
be programmed to support 3V and 1.8V SIM
The SIM power up/down sequence is generated in the UEM. This means that the UEM
generates the RST signal to the SIM. In addition, the SIMCardDet signal is connected to
UEM. Detection for SIM card removal is done with switch integrated to SIM card reader.
Switch is connected to UEM SIMCardDet pin. UEM will automatically power down the
SIM card interface within 5ms if card is removed. This is done to avoid the defected SIM
cards. A comparator inside UEM does the monitoring of the SimCardDet signal. The SIM
interface is powered up when the SIMCardDet signal indicate ”Card in”.
Table 28: SIM interface signals
17 VLED4+ Supply Voltage for Keyboard LED
18 GND Ground
19 GND Ground
20 GND Ground
Symbol Parameter Min Max Unit
Voh Low level output voltage 0 0.3*VIO V
Vol High level output voltage 0.7*VIO VIO V
Symbol Parameter Typ Max Unit
VLED1+ to
VLED4+
Forward voltage Vf over LED when LED ON 3.6 4 V
Forward voltage Vf over LED when LED OFF 0 V
Pin Name Type Purpose
1 VSIM PWR Supply voltage
2 SIMRST O SIM reset
3 SIMCLK O SIM clock
5 GND PWR Ground
6 NC Not connected
7 SIMDATA I/O SIM Data
8 S2 I SIMCARDDET