Nokia 8850 Manual Do Serviço
NSM–2
UI Module
PAMS Technical Documentation
Page 17
Issue 1 12/1999
Nokia Mobile Phones Ltd.
IR Module
An infrared transceiver module is designed to substitute an electrical
cable between the phone and a PC. The infrared transceiver module is a
stand alone component capable to perform infrared transmitting and re-
ceiving functions by transforming signals transmitted in infrared light from
and to electrical data pulses running in two wire asynchronous databus.
IR is located left bottom corner of the product.
cable between the phone and a PC. The infrared transceiver module is a
stand alone component capable to perform infrared transmitting and re-
ceiving functions by transforming signals transmitted in infrared light from
and to electrical data pulses running in two wire asynchronous databus.
IR is located left bottom corner of the product.
Signal
Parameter
Min
Typ
Max
Unit
Notes
IRONX
IR–module on/off
0.7 x VBB
VBB
V
Iout@2mA, IR is at off
state
state
0
0.3 x VBB
IR, is at on state
FBUS_RX
IR receive no pulse
0.7 x VBB
VBB
IR receive pulse
0
0.3 x VBB
FBUS_TX
IR transmit pulse
0.7 x VBB
VBB
Iout@2mA
IR transmit no pulse
0
0.3 x VBB
The module is activated with an IRONX signal by the MAD, which sup-
plies power to the module. The IR datalines are connected to the MAD
accessory interface AccIf via FBUS. The AccIf in MAD performs pulse en-
coding and shaping for transmitted data and detection and decoding for
received data pulses.
plies power to the module. The IR datalines are connected to the MAD
accessory interface AccIf via FBUS. The AccIf in MAD performs pulse en-
coding and shaping for transmitted data and detection and decoding for
received data pulses.
The data is transferred over the IR link using serial data at speeds 9.6,
19.2, 38.4, 57.6 or 115.2 kbits/s, which leads to maximum throughput of
92.160 kbits/s. The used IR module is not complies with the IrDA 1.0
specification (Infra Red Data Association), which is based on the HP SIR
(Hewlett–Packard‘s Serial Infra Red) concept. Maximum transmission dis-
tance is set to 60cm.
19.2, 38.4, 57.6 or 115.2 kbits/s, which leads to maximum throughput of
92.160 kbits/s. The used IR module is not complies with the IrDA 1.0
specification (Infra Red Data Association), which is based on the HP SIR
(Hewlett–Packard‘s Serial Infra Red) concept. Maximum transmission dis-
tance is set to 60cm.
In IR transmission a light pulse corresponds to 0–bit and a ”dark pulse”
corresponds to 1–bit.
corresponds to 1–bit.
UART TX
IR TX
startbit
stopbit
1
0
1
0
0
1
1
0
constant pulse