參數資料
型號: MC68HRC705J1AS
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP20
封裝: WINDOWED, CERAMIC, DIP-20
文件頁數: 137/162頁
文件大?。?/td> 3213K
代理商: MC68HRC705J1AS
Technical Data
MC68HC705J1A — Rev. 4.0
Resets and Interrupts
Resets and Interrupts
4.4.3 Timer Interrupts
The timer can generate these interrupt requests:
Real time
Timer overflow
Setting the I bit in the condition code register disables timer interrupts.
4.4.3.1 Real-Time Interrupt
A real-time interrupt occurs if the real-time interrupt flag, RTIF, becomes
set while the real-time interrupt enable bit, RTIE, is also set. RTIF and
RTIE are in the timer status and control register.
4.4.3.2 Timer Overflow Interrupt
A timer overflow interrupt request occurs if the timer overflow flag, TOF,
becomes set while the timer overflow interrupt enable bit, TOIE, is also
set. TOF and TOIE are in the timer status and control register.
4.4.4 Interrupt Processing
The CPU takes these actions to begin servicing an interrupt:
Stores the CPU registers on the stack in the order shown in
Sets the I bit in the condition code register to prevent further
interrupts
Loads the program counter with the contents of the appropriate
interrupt vector locations:
$07FC and $07FD (software interrupt vector)
$07FA and $07FB (external interrupt vector)
$07F8 and $07F9 (timer interrupt vector)
The return-from-interrupt (RTI) instruction causes the CPU to recover
the CPU registers from the stack as shown in Figure 4-6.
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For More Information On This Product,
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相關PDF資料
PDF描述
MC68HSC705J1ACDW 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO20
MC68HSC705J1AP 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP20
MC68HC705J1ACPE 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP20
MC68HC705J1ACS 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP20
MC68HSR705J1ACDW 8-BIT, OTPROM, MICROCONTROLLER, PDSO20
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