Overview Of External Interrupt Circuit 1 (Edge) - Fujitsu F2MC-8L Series Hardware Manual

CHAPTER 10 EXTERNAL INTERRUPT CIRCUIT 1 (EDGE)

10.1 Overview of External Interrupt Circuit 1 (Edge)

The external interrupt circuit 1 detects edges on the signals input to the three external
interrupt pins and generates the corresponding interrupt requests to the CPU.
External Interrupt Circuit 1 Function (Edge Detection)
The external interrupt circuit 1 function detects the 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 (main
RUN or sub RUN state).
External interrupt pins
External interrupt
sources
Interrupt control
Interrupt flags
Interrupt request
230
: 3 pins (P34/TO/INT0 to P36/INT2)
: Inputs a specified edge (rising edge, falling edge, or both
edges) 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
registers 1 and 2 (EIC1 and EIC2).
: Detects specified edges by the external interrupt request flag
bits in the external interrupt 1 control registers 1 and 2 (EIC1
and EIC2).
: Separate interrupt requests are generated for each external
interrupt source (IRQ0 to IRQ2).