UPD78F9418A NEC, UPD78F9418A Datasheet - Page 228
UPD78F9418A
Manufacturer Part Number
UPD78F9418A
Description
(UPD7894xxA) 8-Bit Single Chip Microcontrollers
Manufacturer
NEC
Datasheet
1.UPD78F9418A.pdf
(319 pages)
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228
15.1 Interrupt Function Types
15.2 Interrupt Sources and Configuration
15-1).
The following two types of interrupt functions are used.
(1)
(2)
A total of 17 non-maskable and maskable interrupts are incorporated as interrupt sources (see Table
Non-maskable interrupt
This interrupt is acknowledged unconditionally. It does not undergo interrupt priority control and is given top
priority over all other interrupt requests.
A standby release signal is generated.
One interrupt source from the watchdog timer is incorporated as a non-maskable interrupt.
Maskable interrupt
These interrupts undergo mask control. If two or more interrupts with the same priority are simultaneously
generated, each interrupt has a predetermined priority as shown in Table 15-1.
A standby release signal is generated.
Five external interrupt and 11 internal interrupt sources are incorporated as maskable interrupts.
CHAPTER 15 INTERRUPT FUNCTIONS
User’s Manual U13952EJ3V0UD
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