UPD75518 NEC, UPD75518 Datasheet - Page 129

• Manufacturer Part Number: UPD75518
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

(a) Configuration of INT0
(b) Configuration of INT1
(c) Configuration of INT4
INT4/P00
INT0/P10
INT1/P11
Input buffer
Input buffer
Noise elimination
circuit
Fig. 5-2 Configurations of INT0, INT1, and INT4 Pins
Selector
Input buffer
fx/64
Both-edge
detection circuit
Edge detection
circuit
Internal bus
Internal bus
IM1
4
IM10
Internal bus
Detection edge specification
IM03
Edge detection
circuit
IM0
4
IM01,IM00
2
Detection edge specification
Sampling clock selection
PD75518(A)
IRQ4
set signal
IRQ1
set signal
IRQ0
set signal
INT4
INT0
INT1
129