Nokia 2170 Service Manual
PAMS
Technical Documentation
NHP–4
General Information
Page 2–12
Issue 1 04/99
Table 16. System Connector
Pin /
Conn
Line
Sym-
bol
Minimum
Typical /
Nominal
Nominal
Maximum
Unit / Notes
1 /
System
GND
Digital ground
2 /
System
System
XMIC
JCON
N
JCON
N
200
mV
mV
rms
420
mV
mV
rms
External audio input
from accessories or
handsfree microphone
from accessories or
handsfree microphone
3 /
System
System
AGND
Analog ground
4 /
S
S
t
TDA
3.0 V
3.15 V
3.30 V
State ”1”
DBUS data to the ac-
i
System
–.3 V
0.0 V
0.63 V
State ”0”
cessories
5 /
System
System
M2BU
S
0 V
0.0 V
0.7 V
Input low
level
level
Serial bidirectional data
and control bus
and control bus
I i k
5
A b
d
t
S
3.0V
4.9 V
Input high
level
level
Isink < 5 mA, baud rate
9600 bits/s. Baud rate
19200 bits/s is in use in
9600 bits/s. Baud rate
19200 bits/s is in use in
0 V
0.0 V
0.35V
Output low
level
level
19200 bits/s is in use in
field test environment
field test environment
3.6V
4.65V
4.9 V
Output high
level
level
6 /
S
S
t
HOOK/
–.3V
0.0 V
0.63V
Hook on
HOOK indication
System
HOOK/
2.5 V
3.15V
3.3 V
Hook off
RXD2
–.3V
0.0 V
0.63V
Output low
level
level
Flash data
2.5 V
3.15V
3.30V
Output high
level
level
7 /
System
System
PHFS/
–.3V
0.0 V
0.63V
Output low,
power off
power off
Hands–free device
power on/off
power on/off
TXD2
2.5V
3.15V
3.30V
Output high,
power on
power on
–.3V
0.0 V
0.63V
Output low
level
level
Flash data
2.5V
3.15V
3.30V
Output high
level
level
8 /
System
System
CHAR
10.0V
12 V
13.5V
Battery charging volt-
age (unloaded)
age (unloaded)
System
CHAR
+
+
730 mA
800 mA
870 mA
Vin < 11 V
age (unloaded)
9 /
System
System
GND
Digital ground
10 /
System
System
XEAR/
HF–
PWR
130
mV
mV
rms
410 mV-
rms
nom. DC–
level 2.0V
level 2.0V
External output to ac-
cessories or handsfree
speaker and HF box
power turn on/off
cessories or handsfree
speaker and HF box
power turn on/off
11 /
System
System
DSYN
2.5V
3.15V
3.30V
State ”1”
DBUS sync
System
DSYN
C
C
–.3V
0.0 V
0.63V
State ”0”