Overview Of The External Interrupt And Nmi Controller - Fujitsu FR60 Hardware Manual

CHAPTER 9 EXTERNAL INTERRUPT AND NMI CONTROLLER
9.1

Overview of the External Interrupt and NMI Controller

The external interrupt controller is a block that controls external interrupt requests
input to NMI and INT0 to INT7.
"H" level, "L" level, rising edge, or falling edge can be selected as the level of a
request to be detected (except for NMI).
■ Block Diagram of the External Interrupt and NMI Controller
Figure 9.1-1 shows a block diagram of the external interrupt and NMI controller.
Figure 9.1-1 Block Diagram of the External Interrupt and NMI Controller
R-bus
8
Interrupt
9
request
8
8
316
Interrupt enable register
Gate Source F/F
Interrupt source register
Request level setting register
9
Edge detection circuit INT0 to INT7
NMI