Overview Of External Interrupt Circuit - Fujitsu F2MC-8L MB89620 Series Hardware Manual

1
12.

Overview of External Interrupt Circuit

The external interrupt circuit detects edges on the signals input to the four external
interrupt pins and generates the corresponding interrupt requests to the CPU.
n External Interrupt Circuit Function
The external interrupt circuit function detects specified edges on signals input to the external
interrupt pins and to generate interrupt requests to the CPU. These interrupts can wake up the
CPU from standby mode and change the device to the normal operating state (RUN state).
External interrupt pins
External interrupt sources
Interrupt control
Interrupt flags
Interrupt request
232
CHAPTER 12 EXTERNAL INTERRUPT CIRCUIT (EDGE)
: 4 pins (P60/INT0 to P63/INT3)
: Inputs a specified edge (rising edge or falling edge) on the signal
input to an external interrupt pin.
: Enables or disables to output interrupt requests by the interrupt
request enable bits in the external interrupt 1 control register
(EIC1) and external interrupt 2 control register (EIC2).
: Detects specified edges by the external interrupt request flag bits
in the external interrupt 1 control register (EIC1) and external
interrupt 2 control register (EIC2).
: Separate interrupt requests are generated for each external
interrupt source (IRQ0, IRQ1, IRQ2, and IRQ3).
MB89620 series