Sharp CD-C478 Service Manual page 57

ICD1 RH-iX0234AWZZ:System Microcomputer (IX0234AW) (1/2)
Input/Output
Pin No. Port Name
1-2 P16-P17 Input/Output
(2)*
3-10 P30-37 Input/Output
(5~7)*
11 P70 Input/Output
12 RES Input
13 XT1/P74 Input
14 XT2/P75 Output
15 VSS1
16 CF1 Input
17 CF2 Output
18 VDD1
19-22 P80-P83 Input
23-27 P84-P87 Input
27-29 P71-73 Input
30-36 S0/T0- Output
S6/T6
37-45 S7/T7- Input/OUtput
S15/T15
46 VDD3
47-50 S16-S20 Input/Output
51 VP
52-63 S21-S31 Input/Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
8-Bit input/output port. Input/output can be specified in 1-bit units
Dual-purpose function
P16: BUZ output
P17: Timer 1 output (PWM output)
8-Bit input/output port. Input/output can be specified in 1-bit units
Dual-purpose function
Nchannel open output: 15V withstand rating
4-Bit input/output port. Input/output can be specified in 1-bit units.
2-Bit input port. Dual-purpose functio
P70: INT0 input/HOLD release input/Nch-Tr. Output for watchdog timer
Reset terminal
Input terminal for 32.768 KHz crystal oscillator
Connected to VDD when not used
Dual-purrpose function
General-purpose input port P74
Output terminal for 32.768 KHz crystal oscillator
Dual-purrpose function
General-purpose input port P75
When not use. (Oscillatication specification) Open. (Port specification) Connect to VDD1.
— Negative power terninal
Intput terminal for ceramic oscillator
Output terminal for ceramic oscillator
— Positive power terninal
4-Bit input/output port. Input/output can be specified in 1-bit units.
4-Bit input port. Dual-purrpose function
AD input port (8 pcs.)
4-Bit input/output port. Input/output can be specified in 1-bit units.
4-Bit input port. Dual-purrpose function
AD input port (8 pcs.)
4-Bit input/output port. Input/output can be specified in 1-bit units.
4-Bit input port. Dual-purrpose function
P71: INT1 input/HOLD release input
P72: INT2 input/timer 0 event input
P73: INT3 input (input with noise filter)/ timer 0 event input
Fluorescent charcater display tube (VFD)display controller
Segment/timing shared output
Fluorescent charcater display tube (VFD)display controller
Segment/timing shared output
Pull-down resistance built-in output
— Positive power terninal
Fluorescent charcater display tube (VFD)display controller
Segment output
Dual-purrpose function
S16: High voltage withstand input port PC0
S17: High voltage withstand input port PC1
S18: High voltage withstand input port PC2
S19: High voltage withstand input port PC3
S20: High voltage withstand input port PC4
— Negative power terminal (Independent power supply only for fluorescent character display tube
drive output)
(Power supply for pull-dowen resistores)
Fluorescent charcater display tube (VFD)display controller
Segment output
Dual-purrpose function
S21: High voltage withstand input port PC5
S22: High voltage withstand input port PC6
S23: High voltage withstand input port PC7
S24: High voltage withstand input port PD0
S25: High voltage withstand input port PD1
S26: High voltage withstand input port PD2
S27: High voltage withstand input port PD3
S28: High voltage withstand input port PD4
S29: High voltage withstand input port PD5
S30: High voltage withstand input port PD6
S31: High voltage withstand input port PD7
Function
– 57 –
CD-C478/478C