UPD75218 NEC, UPD75218 Datasheet - Page 24

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

PD75218
6. INTERRUPT FUNCTIONS
The PD75218 has eight types of interrupt sources and can generate multiple interrupts with priority order.
It is also equipped with two types of test sources. INT2 is an edge detected testable input.
The PD75218 interrupt control circuit has the following functions:
• Hardware-controlled vectored interrupt function which can control interrupt acknowledge with the interrupt
enable flag (IE
) and the interrupt master enable flag (IME).
• Function of setting any interrupt start address.
• Multiple interrupt function which can specify priority order with the interrupt priority select register (IPS).
• Interrupt request flag (IRQ
) test function. (Interrupt generation can be checked by software.)
• Standby mode release function (Interrupts to be released can be selected by interrupt enable flags.)
24