參數(shù)資料
型號: μPD789406
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 80/128頁
文件大小: 607K
代理商: ΜPD789406
80
μ
PD789405, 789406, 789407
6.
INTERRUPT FUNCTIONS
6.1
Interrupt Function Types
Two types of interrupt function are supported.
(1) Nonmaskable interrupt
A nonmaskable interrupt request is accepted unconditionally, that is, even when interrupts are disabled. A
nonmaskable interrupt takes precedence over all other interrupts; it is not subjected to interrupt priority control.
A nonmaskable interrupt causes the standby release signal to be generated.
The
μ
PD789405,
μ
PD789406, and
μ
PD789407 support one nonmaskable interrupt namely, the watchdog timer
interrupt.
(2) Maskable interrupt
Maskable interrupts are those which are subjected to mask control. If two or more maskable interrupts occur
simultaneously, the default priority listed in Table 6-1 applies.
The maskable interrupts cause the standby release signal to be generated.
The maskable interrupts supported by the
μ
PD789405,
μ
PD789406, and
μ
PD789407 include 4 external
interrupts and 12 internal interrupts.
6.2
Interrupt Sources and Configuration
The
μ
PD789405,
μ
PD789406, and
μ
PD789407 each support a total of 17 maskable and nonmaskable interrupt
sources. (See
Table 6-1
.)
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