Fbus Interface Electrical Characteristics (Between Rap And N2300); Headset Hook Detection Interface (Xmicn) Electrical Characteristics - Nokia N72 Service Manual

RM-180
System Module
Description
Low-level V
OL
output voltage
High-level V
OH
output voltage
(driven)
Output signal V
CRS
crossover
voltage

FBUS interface electrical characteristics (between RAP and N2300)

Description Parameter
High-level V
IH
input
voltage
Low-level V
IL
Input
voltage
High-level V
OH
output
voltage
Low-level V
OL
output
voltage
Rise/fall
tR/tF
time

Headset hook detection interface (XMICN) electrical characteristics

Description
Hook detection 1.25
threshold 1
Hook detection 0.5
threshold 2
Hook detection
hysteresis
Hook detection 1
pull ups
Issue 1
Parameter
0
2.8
1.3
Min
0.7 x
V
DDSHV2
0
0.8 x
V
DDSHV2
0
0
(VDDSHV2 = 1.8V)
Min
1.35
0.6
25
2
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Min Max
0.3
3.6
2
Max Unit
V V
DDSHV2
0.3 x V
V
DDSHV2
V V
DDSHV2
0.22 x V
V
DDSHV2
25 ns
Typ Max
1.45
0.7
4
Nokia Customer Care
Unit
V
V
V
Unit
V Two fixed
thresholds
inside N2200.
V
Selectable by
SW
mV
uA
Notes
Notes
Page 9 –35