13 Cpu Data - Panasonic KX-TS550MEB Service Manual

KX-TS550MEB / KX-TS550MEW

13 CPU DATA

LS 1
MFL 2
RO 3
V 4
DD
A 5
GND
STB 6
CI 7
MO 8
LLC 9
V V
SS SS
HS/DP 10
OSC 11
MODE 12
C4 13
C3 14
C2 15
C1 16
R4 17
R3 18
R2 19
R1 20
FCI 21
LED 22
M1 23
M2 24
CS 25
V 26
SS
LI 27
RI 28
Pin
Symbol
No.
1 LS Line Current Sense Input
MFL MF Level Setting
2
3 RO Receive Output
V Positive Voltage Supply
4
DD
5 A Analogue Ground
GND
STB
6 Side Tone Balance Input
7 CI Complex Impedance Pin
8 MO Melody Output
LLC Line Loss Compensation
9
10 HS/DP Hook Switch Input and Dial Pulse Output
OSC Oscillator Input
11
12 MODE Signalling Mode Select Input
C4 Keyboard Column
13
14 C3 Keyboard Column
IC
Clock frequency: 3.58MHz
Operating range: 13~100mA
Pin
Function
No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
V
SS
18
Symbol
Function
C2 Keyboard Column
C1 Keyboard Column
R4 Keyboard Row
R3 Keyboard Row
R2 Keyboard Row
R1 Keyboard Row
FCI Frequency Comparator Input
LED LED Output Driver
M1 Microphone Input
M2 Microphone Input
CS Current Shunt Control Output
V Negative Power Supply
SS
LI Line Input
RI Receive Input
V EMC ground connection
SS