參數(shù)資料
型號(hào): μPD789217Y
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): 96/144頁
文件大?。?/td> 632K
代理商: ΜPD789217Y
Preliminary Product Information
96
μ
PD789216Y, 789217Y
7. INTERRUPT FUNCTIONS
7.1
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
PD789216Y and
μ
PD789217Y 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 priority listed in Table 7-1 applies.
The maskable interrupts cause the standby release signal to be generated.
The maskable interrupts supported by the
μ
PD789216Y and
μ
PD789217Y include 4 external interrupt sources
and 14 internal interrupt sources.
7.2
Interrupt Sources and Configuration
The
μ
PD789216Y and
μ
PD789217Y each support a total of 19 maskable and nonmaskable interrupt sources.
(See
Table 7-1
.)
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