Interrupt Sources And Configuration - NEC PD789860 User Manual

14.2 Interrupt Sources and Configuration

There are a total of 7 non-maskable and maskable interrupt sources (see Table 14-1).
Note 1
Interrupt Type Priority
−
Non-maskable
interrupt
Maskable 0
interrupt
1
2
3
4
Notes 1. Priority is the priority order when several maskable interrupt requests are generated at the same time. 0
is the highest and 4 is the lowest.
2. Basic configuration types (A) and (B) correspond to (A) and (B) in Figure 14-1.
Remark There are two interrupt sources for the watchdog timer (INTWDT): non-maskable interrupts and
maskable interrupts (internal). Either one (but not both) should be selected for actual use.
CHAPTER 14 INTERRUPT FUNCTIONS
Table 14-1. Interrupt Sources
Interrupt Source
Name Trigger
INTKR1 Key return input falling edge
detection
INTWDT Watchdog timer overflow
(when watchdog timer mode 1
is selected)
INTWDT Watchdog timer overflow
(when interval timer mode is
selected)
INTTM30 Generation of match signal for
8-bit timer 30
INTTM40 Generation of match signal for
8-bit timer 40
INTLVI1 LVI interrupt request signal
INTEE0 EEPROM write termination
signal
User's Manual U14826EJ5V0UD
Internal/External Vector Table
Address
External 0002H
Internal 0004H
0006H
0008H
000AH
000CH
Basic
Configuration
Note 2
Type
(A)
(B)
137