User’s Manual U11969EJ3V0UM00
99
CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION
The V854 is provided with a dedicated interrupt controller (INTC) for interrupt processing and can process a total
of 32 interrupt requests.
An interrupt is an event that occurs independently of program execution, and an exception is an event that occurs
dependently on program execution. Generally, an exception takes precedence over an interrupt.
The V854 can process interrupt requests from the internal peripheral hardware and external sources. Moreover,
exception processing can be started by the TRAP instruction (software exception) or by generation of an exception
event (fetching of an illegal op code).
5.1 Features
Interrupt
• Non-maskable interrupt: 1 source
• Maskable interrupt: 31 sources
• 8 levels programmable priorities control
• Multiple interrupt control according to priority
• Mask specification for each maskable interrupt request
• Noise elimination, edge detection, and valid edge of external interrupt request signal can be specified.
Exception
• Software exception: 32 sources
• Exception trap: 1 source (illegal op code exception)
Interrupt/exception sources are listed in Table 5-1.
Содержание V854 UPD703006
Страница 2: ...2 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 22: ...22 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 80: ...80 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 134: ...134 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 156: ...156 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 294: ...294 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 320: ...320 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 324: ...324 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 336: ...336 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 376: ...376 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 382: ...382 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 394: ...394 User s Manual U11969EJ3V0UM00 MEMO ...
Страница 396: ...396 User s Manual U11969EJ3V0UM00 MEMO ...