Nokia NSB-5 Series Technical Documentation Manual page 13

PAMS Technical Documentation
IB-
Pin NAME Function
pin
11 Yes MBUS Bidirec-
tional
serial bus
FLASH_
CLK
2, - L_GND Logic and
14 charging
ground
(separated
from
phone GND
by EMI
compo-
nents)
4,5 - CHRG_ Charger
CTRL control
(from
phone to
accessory)
Issue 1 03/01
Table 3: System/IBI connector
Min Typ Max Unit
0 0.8 V
2.0 2.8 V
0 0.8 V
2.1 2.9 V
4.7 kΩ
220 kΩ
Ω
100
200 pF
µs
5
0 1.0 A
0 0.8 V
1.7 2.9 V
32 37 Hz
1 99 %
20 kΩ
30 kΩ
Nokia Mobile Phones Ltd.
System Module
Description
Input low voltage (ref GND)
Input high voltage (ref GND)
Output low voltage @ I <4mA
OL
(ref GND)
Output high voltage @ I <100
OH
µA (ref GND)
Pull-up resistor in phone
Pull-down resistor in accessory
Serial (EMI filtering) resistor in
phone
Cable capacitance
Rise/fall time @ 9600 bits/s
Ground current
<20 µA
Output low voltage @ I
OL
<20 µA
Output high voltage @ I
OH
PWM frequency
PWM duty cycle
Serial (EMI filtering) resistor in
phone
Pull-down resistor in phone
NSB-5
Page 13