Classification Terminal
Pin No.
Input/
Output
Function
Power
supply
Vcc
59
---
Power supply terminal
GND
8
---
Ground terminal
Test
2
Input
Not the user’s terminal. Connect to the Vcc terminal.
Reset
RESET
5
Input
Reset terminal for MCU.
Oscillation
OSC1
3
Input
Input/output terminal to the main oscillator. Connect
the ceramic oscillator, crystal oscillator, or external
oscillation circuit.
OSC2
4
Output
X1
6
Input
Input/output terminal to the sub oscillator. Connect
the 32.768kHz crystal oscillator. If not, fix X1 terminal
Vcc and open X2 terminal.
X2
7
Output
ResetTestPort
D0~D5
D9~D11
9~17
Input/
output
Input/output terminal which is adressed every 1
The terminal D0~D3 are the source large current
output terminal, which supplies the current of max.
10mA to each terminal.
The terminal D4, D5, D9~D11 are sink iarge current
output terminal, which supplies the current of max.
15mA to each terminal.
D12, D13
18, 19
Input
Input terminal which is adressed every 1 bit.
R00,~R43
R60,~RA1
20~57
Input/
output
Input/output terminal which is adressed every 4
RB0~2,
RD0~1,
RE0
60~64, 1
Input
Input terminal which is adressed every 4 bit.
Interrupt
INT2 ~
INT4,
19~23
Input
Input terminal for external interrupt.
Stop clear
18
Input
Input terminal used for the transfer from stop mode
active mode
Serial
interface
37
Input/
output
Clock input/output terminal for serial interface.
SI1
38
Input
RX data input terminal for serial interface.
SO1
39
Output
TX data output terminal for serial interface.
Timer
TOC, TOD
35, 34
Output
Timer output treminal.
EVND
36
Input
Event input terminal.
Voltage
comparator
COMP0,
COMP1
63, 64
Input
Analog input terminal for comparator.
VCref
1
---
Reference level voltage terminal for threshold voltage
analog input terminal.
Divide ratio
selection
SEL
58
Input
The terminal which selects the divide ratio of system
clock right after the reset and when returned to
mode from stop mode.
Connect to Vcc voltage when selecting the divide
and connect to GND voltage when selecting the
by-32.
16
Summary of Contents for KX-T7456 - Digital 24 Button Speakerphone Display
Page 4: ...4 DISASSEMBLY INSTRUCTIONS 4 1 HOW TO REMOVE THE LOWER CABINET Procedure 1 4 ...
Page 8: ...5 IC DATA 5 1 IC1 8 ...
Page 11: ...11 ...
Page 15: ...15 ...
Page 20: ...7 4 DATA COMMUNICATION CIRCUIT 1 Function 20 ...
Page 24: ...The reset signal is negledted 24 ...
Page 29: ...8 TROUBLESHOOTING GUIDE 8 1 NO OPERATION 8 2 THE LCD DOES NOT OPERATE 29 ...
Page 31: ...8 5 SPEAKER PHONE TROUBLE 8 6 TONE DIAL TROUBLE 8 7 TROUBLE OF OHCA 31 ...
Page 32: ...8 8 HANDSET TROUBLE 9 TERMINAL GUIDE OF ICS TRANSISTORS AND DIODES 32 ...
Page 36: ...12 CABINET AND ELECTRICAL PARTS LOCATION 13 ACCESSORIES AND PACKING MATERIALS 36 ...
Page 49: ...33 37 34 35 36 25 32 ...
Page 55: ...SW301 CN301 1 2 3 ...
Page 57: ...1 5 2 6 3 7 4 8 ...
Page 58: ...9 13 10 14 11 15 12 16 ...
Page 59: ...17 21 18 22 19 23 20 24 ...