Nokia NSB-5 Series Technical Documentation Manual page 12

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