User Guide

RH-26
2 - System Module CCS Technical Documentation
Page 32 ©Nokia Corporation Issue 1 02/04
Figure 12: UPP/UEMK SIM interface connections
The internal clock frequency from CTSI block is 13 MHz in GSM. To achieve the minimum
starting SIMCardClk rate of 3.25 MHz and the duty cycle requirement between 40% and
60%, the slowest possible clock supplied to the SIM has to be in the GSM system clock
rate of 13/4 MHz.
System connector
The system connector in RH-26 is called Pop-Port
TM
System Connector. It consists of
charging plug socket and system connector. In RH-26, the system connector includes:
Function Note
Charging Pads for 2 -wire charging in cradles
Audio - 2 -wire fully differential mono audio output
- 2-wire differential microphone input
Power Supply for Accessories 2.78V 70 mA output to accessories (DCT4)
ACI (Accessory Control Interface) Accessory detection/removal & controlling
FBUS Standard FBUS
UEM
UPP
C5 C6 C7
C1
C2
C3
SIMDATA
Data
SIMClk
SIMCLK
SIMIO
SIMRST
VSIM
From Battery Type contact
SIMIO
SIMClk
Data
GND
GND
SIM
SIMIF
register
UEM
digital
logic
BSI
UIF Block
CBusDa
CBusEnX
CBusClk
C8
C4
UEMInt