Headset Hook Detection Interface (Xmicn) Electrical Characteristics; Audio Signal Electrical Characteristics; Sim If Connections - Nokia RM-42 Service Manual

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Headset hook detection interface (XMICN) electrical characteristics

Description Min
Hook detection 1.25
threshold 1
Hook detection 0.5
threshold 2
Hook detection
hysteresis
Hook detection 1
pull ups

Audio signal electrical characteristics

Description
XMIC N
XMIC P
HSEAR N
HSEAR P
HSEAR R N
HSEAR R P

SIM IF connections

Pin
C1 SIMCLK
C2 SIMRST
C3 VSIM
C5 SIMDATA
Page 9–34
Typ
1.35
0.6
25
2
Parameter
Audio in
Audio in
Audio out
Audio out
Audio out
Audio out
Signal I/O
Out
Out
Out
In/Out
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Max
1.45
0.7
4
Typ
1
1
1
1
1
1
Engine connection
Retu
Retu
Retu
Retu
Unit
V
V
mV
uA
Unit
V
pp
V
pp
V
pp
V
pp
V
pp
V
pp
SIM1ClkC
SIM1Rst
VSIM1
SIM1DaC
RM-42
System Module
Notes
Two fixed
thresholds
inside Retu.
Selectable by
SW
Notes
DC Offset 2.5-2.78V
DC Offset 2.5-2.78V
10Ω nominal serial
impedance
10Ω nominal serial
impedance
10Ω nominal serial
impedance
Not connected in
mono
10Ω nominal serial
impedance
Not connected in
mono
Notes
Clock signal to
SIM card
Reset signal to
SIM card
Supply voltage
to SIM card,
1.8V or 3.0V.
Data input /
output
9241872 (Issue 1)