Internal Microphone; Internal Speaker - Nokia NHM-7 series Service Manual

NHM–7
System Module & UI
BB Signal FM Radio
Signal
GenIO(12) FMCtrlDa
GenIO(27) FMTuneX
MIC3P FMAudio

Internal microphone

Signal
MICP
MICN

Internal speaker

Signal
EARP
EARN
Page 12
Min Nom
1.4V 1.8V
0
10 µs
1.5 µs
1.4V 1.8V
0
228mV 326mV
pp pp
50dB
Min Nom
2.0 V 2.1 V
2.0V 2.1V
Min Nom
0.75V 0.8V
0.75V 0.8V
E Nokia Corporation
PAMS Technical Documentation
Max Condition
1.88V High
0.4V Low
14us t
da
t
shift
t
hold
1.88V High
0.4V Low
460mV
pp
S/N
2% Harmonic
distortion
Max Condition
200mV AC
pp
2.25 V DC
2.25V DC
Max Condition
2.0 V AC
pp
0.85V DC
2.0 V AC
pp
0.85V DC
Issue 1 10/2001
Note
Bidirectional
shift register
available after
"search
ready"
data available
after
FMCtrlClk ris-
ing edge (read
operation)
FMCtrlDa sta-
bile after
FMCtrlClk ris-
ing edge
(write opera-
tion)
from FM mod-
ule to UPP
(FMCtrlClk =
'1')
Note
2.2kΩ to
MIC1B MIC1B
Note
Differential
output
out ut
(V = 4.0
diff
V )
pp