參數(shù)資料
型號: μPD789415
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(jī)微控制器(8位單片微控制器)
文件頁數(shù): 79/126頁
文件大?。?/td> 590K
代理商: ΜPD789415
79
μ
PD789415, 789416, 789417
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
PD789415,
μ
PD789416, and
μ
PD789417 support one nonmaskable interrupt source 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
PD789415,
μ
PD789416, and
μ
PD789417 include 4 external
interrupt sources and 12 internal interrupt sources.
6.2
Interrupt Sources and Configuration
The
μ
PD789415,
μ
PD789416, and
μ
PD789417 each support a total of 17 maskable and nonmaskable interrupt
sources. (See
Table 6-1
.)
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