Nokia Customer Care
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)