Internal Signals And Connections - Nokia RH-9 Series Ccs Technical Documentation

RH-9
System Module & UI
VR5 2.70V
VR6 2.70V
VR7 2.70V
Signal Min
IPA1 and IPA2 0mA

Internal Signals and Connections

The tables below describe internal signals. The signal names can be found on the sche-
matic for the ey1a PWB.
Audio
Signal
MIC1P (Differential input P)
MIC1N (Differential input N)
MICB1 (Microphone Bias)
External loading of MICB1
Table 8: Internal speaker (Differential output EARP & EARN)
Signal
Output voltage swing
Load Resistance (EARP to EARN)
Load Capacitance (EARP to EARN)
MIDI
Signal From
Shutdown GENIO[14]
Page 10
2.78V
2.78V
2.78V
Table 6: Current sources
Nom
-
Table 7: Internal microphone
Min Nom Max
- - 100mV
- - 100mV
2.0 V 2.1 V 2.25 V
- - 600uA
No
Min
m
4.0 -
26 32
- -
Table 9: Connections between UPP and LM4890
To Parameter
Shutdown Vih
(p. 5) Vil
ãNokia Corporation
CCS Technical Documentation
2.86V
2.86V
2.86V
Max
5mA
Condition Note
G=20dB 1kΩ to MIC1B
pp
(RC filtered by 220R/4.7uF)
G=20dB 1kΩ to GND
pp
DC
DC
Max Units Note
- Vpp Differential output
- W
50 nF
Min. Max.
1.2 -
- 0.4
I = 50mA
max
I = 0.1mA
Sleep
I = 50mA
max
I = 0.1mA
Sleep
I = 45mA
max
Note
Not used
Unit Notes
V LM4890 detec-
V tions treshold
levels
Issue 1 11/02