CHAPTER 10 INTERRUPT FUNCTIONS
User’s Manual U18172EJ2V0UD
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Figure 10-1. Basic Configuration of Interrupt Function
(A) Internal maskable interrupt
MK
IF
IE
Internal bus
Interrupt request
Vector table
address generator
Standby release signal
(B) External maskable interrupt
Internal bus
External interrupt mode
register (INTM0)
MK
IF
IE
Vector table
address generator
Standby
release signal
Edge
detector
Interrupt
request
IF: Interrupt request flag
IE: Interrupt enable flag
MK: Interrupt mask flag
10.3 Interrupt Function Control Registers
The interrupt functions are controlled by the following four types of registers.
• Interrupt request flag register 0 (IF0)
• Interrupt mask flag register 0 (MK0)
• External interrupt mode register 0 (INTM0)
• Program status word (PSW)
Table 10-2 lists interrupt requests, the corresponding interrupt request flags, and interrupt mask flags.