User Guide

NMM-3 Company Confidential
7 - System Module & UI CCS Technical Documentation
Page 7-18 Copyright  2003 Nokia Corporation Issue 1 (11/2003)
Company Confidential
IR Module
As there are no level shifters in UEME, a 1.8V logic interface 1M IR. compliant module
from Citizen: CIM-93M5 is used. It is a shielded package to reduced EMC susceptibility
to GSM/WCDMA emissions.
The IR link supports speeds from 9600 bit/s to 1.152 MBit/s up to distance of 1m. Trans-
mission over the IR is half–duplex.
The length of the transmitted IR pulse depends on the speed of the transmission.
At speeds of 115.2 kbit/s or less (SIR), pulse lengths are kept close to the minimum of
1.41us specified by IrDA in order to keep current consumption to a minimum. If trans-
mission speed is set to 1.152Mbit/s (MIR) the pulse length is approximately150ns. Signal
rates of 0.576Mbits/s and greater than 1.152 MBit/s are not supported by NMM-3.
IR Module Pin Description:
24 COL2 Keypad Column
25 ROW4 Keypad Row
26 ROW3 Keypad Row
27 GND 11 GND Ground
28 GND 12 GND Ground
29 ROW2 Keypad Row
30 ROW1 Keypad Row
31 ROW0 Keypad Row
32 COL3 Keypad Column
33 DIFRDX 17 RDX Memory read enable (active low)
34 DIFWRX 18 WRX Memory write enable (active low)
35 LCDRSTX 20 RESX Reset (active low)
36 GND 19 GND Ground
PIN Name Function Active
1 LEDA LED Anode -
2 LEDC LED Cathode: No connection -
3 TXD Transmitter Data Input High
4 RXD Received Data Output Low
5 SD Shut Down High
6 Vcc Supply Voltage (VFLASH1) -
7 Vlogic Digital Supply Defining I/O Voltage (VIO) -
8 GND Ground -
Shield EMI Shield (Ground)
UI Connector LCD Connector Function
PIN Name PIN Name