Nokia Mobile Phones NSE-5 Series, Service Manual, Page: 24 / 327

PAMS
Technical Documentation
NSE–5
System Module
Page 2 – 10
Issue 1 07/99
Table 3. System/IBI connector (continued)
Description Unit Max Typ Min Function Name IB-
pin
Pin
13 Yes FBUS
_TX
Serial
data out
(f 0.1 0.8 V Output low voltage @ I
OL
4 mA (ref. GND)
_ da a u
(from
phone to
accesso-
1.7 2.8 V Output high voltage @ I
OH
4 mA (ref. GND)
accesso-
ry)
47 k
W
Pull–up resistor in phone
ry)
220 k
W
Pull–down resistor in acces-
sory
47 100
W
Serial (EMI filtering) resistor
in phone
150 pF Cable capacitance
1
m
s Rise/Fall time
12 Yes FBUS
RX
Serial
d t i
0 0.8 V Input low voltage (ref. GND)
_RX data in
(from ac-
2.0 2.8 V Input high voltage (ref. GND)
(from ac-
cessory to
h )
220 k
W
Pull–down resistor in phone
y
phone)
47 k
W
Pull–up resistor in accessory
2.2 k
W
Serial (EMI filtering) resistor
in accessory
150 pF Cable capacitance
2
m
s Rise/Fall time @ 115kbits/s
1
m
s Rise/Fall time @ 230kbits/s
11 Yes MBUS Bidirec-
ti l i
0 0.8 V Input low voltage (ref. GND)
FLAS
tional seri-
al bus
2.0 2.8 V Input high voltage (ref. GND)
FLAS
H_CL
K
al bus
Flash seri-
0 0.8 V Output low voltage @ I
OL
4 mA (ref. GND)
K Flash seri-
al data
clock
(f
2.1 2.9 V Output high voltage @ I
OH
100
m
A (ref. GND)
(from ac-
cessory to
4.7 k
W
Pull–up resistor in phone
cessory to
phone)
220 k
W
Pull–down resistor in acces-
sory
100
W
Serial (EMI filtering) resistor
in phone
200 pF Cable capacitance
5
m
s Rise/Fall time @ 9600 bits/s