Panasonic KX-T7453 Service Manual page 11

Name NO. I/O
APMP 1
Analog
input
2 ---
VREFDA
AG1 3
4
HO+ Analog
HO- 5 output
A5V1 6 ---
A5V2 7
SPO 8
Analog
output
AG2 9 ---
P/-S 10
CMOS
input
-RESET 11
DG1 12 ---
OP0 13
3 states
OP1 14
output
D5V1 15 ---
OP2 16
3 states
OP3 17
output
OP4 18
OP5 19
OP6 20
OP7 21
Classification
Analog
Non-inverting input terminal of microphone amplifier M1.
Connect to the microphone.
Power. Reference voltage teminal of DAC.
supply, etc.
Connect the capacitor of 40
(AG2).
Ground terminal of the analog circuit.
Analog
Output terminal for the handset receiver.
HO+ terminal and HO- terminal are biased to Vdd/2 voltage.
HO- terminal is the inverse porality output terminal for pin 4 (H
+).
Connect the capacitor in series between the handset and thes
terminals to cut the DC.
Use the nonpolar type capacitor.
5V power supply terminal of analog circuit.
Power
supply, etc.
Analog
Output treminal for the speaker amplifier.
Connect to the external speaker amplifier input terminal.
SPO terminal is biased to Vdd/2 voltage.
Connect the capacitor of 0.1
speaker amplifier input terminal and this terminal.
Ground terminal of the analog circuit.
Powers
supply, etc.
Micro- Mode selection terminal of microcomputer interface.
computer Inputting "0" selects the serial mode, and "1" selects the
parallel mode.
interface
System reset terminal.
The system is reset when "0" is pressed.
Ground terminal of the digital circuit.
Powers
supply, etc.
Output port Outputs BIT0 signal of OPORT1 resistor.
Outputs BIT1 signal of OPORT1 resistor.
5V power supply terminal of digital circuit.
Powers
supply, etc.
Outputs BIT2 signal of OPORT1 resistor.
Outputs BIT3 signal of OPORT1 resistor.
Outputs BIT4 signal of OPORT1 resistor.
Output
Outputs BIT5 signal of OPORT1 resistor.
Outputs BIT6 signal of OPORT1 resistor.
Outputs BIT7 signal of OPORT1 resistor.
Function
11
F between this terminal and pi
F in series between the extern