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參數(shù)資料
| 型號： | MC68HC05J3CDW |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | PLASTIC, SOIC-20 |
| 文件頁數(shù)： | 53/92頁 |
| 文件大?。?/td> | 912K |
| 代理商： | MC68HC05J3CDW |
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MC68HC05J3
MOTOROLA
7-7
RESETS AND INTERRUPTS
7
7.5.3
16-bit timer interrupts
There are three different timer interrupt ags (ICF, OCF and TOF) that will cause a timer interrupt
whenever they are set and enabled. These three interrupt ags are found in the three most
signicant bits of the timer status register (TSR) at location $13. ICF will vector to the service
routine dened by $0FF6 - $0FF7, OCF will vector to the service routine dened by $0FF4 - $0FF5
and TOF will vector to the service routine dened by $0FF2 - $0FF3 as shown in Table 7-2.
There are three corresponding enable bits; ICIE, OCIE and TOIE which are located in the timer
control register (TCR) at address $12. Full details of the programmable timer can be found in
7.6
Hardware controlled interrupt sequence
The following three functions; reset, STOP and WAIT, are not in the strictest sense interrupts.
However, they are acted upon in a similar manner. Flowcharts for STOP and WAIT are shown in
RESET: A reset condition causes the program to vector to its starting address, which is contained
in memory locations $1FFE (MSB) and $1FFF (LSB). The I-bit in the condition code
register is also set, to disable interrupts.
STOP:
The STOP instruction causes the oscillator to be turned off and the processor to ‘sleep’
until an external interrupt (IRQ) or a keyboard interrupt occurs or the device is reset.
WAIT:
The WAIT instruction causes all processor clocks to stop, but leaves the timer clocks
running. This ‘rest’ state of the processor can be cleared by reset, an external interrupt
(IRQ or keyboard) or a timer interrupt. There are no special WAIT vectors for these
individual interrupts.
TPG
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)代理商/技術(shù)參數(shù) |
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| MC68HC05J3CP | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J3DW | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J3P | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit |
| MC68HC05J5A | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-bit microcontroller units |
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