Nokia 5140 Manuales De Servicio

NPL-4/5

System Module and User Interface

Nokia Customer Care

Page 40

 Copyright © 2004 Nokia Corporation. All rights reserved.

Issue 1 05/04

age. It is only allowed to change the SIM supply voltage when the SIM IF is powered 
down.

The whole SIM interface locates in two chips UPP and UEMEK.

The SIM interface in the UEMEK contains power up/down, port gating, card detect, data 
receiving, ATRcounter, registers and level shifting buffers logic. The SIM interface is the 
electrical interface between the Subscriber Identity Module Card (SIM Card) and mobile 
phone (via UEMEK device).

The data communication between the card and the phone is asynchronous half duplex. 
The clock supplied to the card is in GSM system 1.083 MHz or 3.25 MHz. 

NPL-4/5 has functional cover interface for changeable functional B-cover. The functional 
cover interface consists of FCI ASIP chip and five contact pads on UI PWB. HW does not 
support the I2C in BB4.0 engine whereupon interface uses SW emulated I2C protocol. 
The FCI ASIP chip includes switch for power supply control and EMC filters for data lines.

SIMCARDet, BSI 
comparator 
Threshold

Vkey

1.94

2.1

2.26

V

SIMCARDet, BSI 
comparator 
Hysteresis (1)

Vsimhyst

50

75

100

mV

y

p

 

C5 C6 C7 

C1  C2  C3 

 

 

type contact 

C8 

C4