User Guide

NSB-5
System Module PAMS Technical Documentation
Page 12 Nokia Mobile Phones Ltd. Issue 1 03/01
13 Yes FBUS_
TX
Serial data
out (from
phone to
accessory)
0.1
1.7
47
220
47
0.8
2.8
100
150
1
V
V
kΩ
kΩ
Ω
pF
µs
Output low voltage @ I
OL
<mA (ref
GND)
Output high voltage @ I
OH
<4mA
(ref GND)
Pull-up resistor in phone
Pull-down resistor in accessory
Serial (EMI filtering) resistor in
phone
Cable capacitance
Rise/fall time
12 Yes FBUS_
RX
Serial data
in (from
accessory
to phone)
0
2.0
220
47
2.2
0.8
2.8
150
2
1
V
V
kΩ
kΩ
kΩ
pF
µs
µs
Input low voltage (ref GND)
Input high voltage (ref GND)
Pull-down resistor in phone
Pull-up resistor in accessory
Serial (EMI filtering) resistor in
accessory
Cable capacitance
Rise/fall time @ 115kbits/s
Rise/fall time @ 230kbits/s
Table 3: System/IBI connector
Pin
IB-
pin
NAME Function Min Typ Max Unit Description