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68HC705JJ7_1 参数 Datasheet PDF下载

68HC705JJ7_1图片预览
型号: 68HC705JJ7_1
PDF下载: 下载PDF文件 查看货源
内容描述: 常规版本规格 [General Release Specification]
分类和应用:
文件页数/大小: 230 页 / 5548 K
品牌: FREESCALE [ Freescale ]
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Freescale Semiconductor, Inc.  
Op e ra ting Mod e s  
• An external interrupt signal on a port A external interrupt pin — If  
selected by the PIRQ bit in the MOR, a low-to-high transition on a  
PA3–PA0 pin loads the program counter with the contents of  
locations $1FFA and $1FFB.  
• External reset — A logic zero on the RESET pin resets the MCU  
and loads the program counter with the contents of locations  
$1FFE and $1FFF.  
When the MCU exits stop mode, processing resumes after a  
stabilization delay of 16 or 4064 internal bus cycles, depending on the  
state of the DELAY bit in the MOR.  
NOTE: Execution of the STOP instruction without setting the SWAIT bit in the  
MOR will cause the oscillators to stop, and, therefore, disable the COP  
watchdog timer. If the COP watchdog timer is to be used, stop mode  
should be changed to halt mode as described in 6.4.3 Halt Mode.  
6.4.2 Wa it Mod e  
The WAIT instruction puts the MCU in a low-power wait mode which  
consumes more power than the stop mode and affects the MCU as  
follows:  
• Enables interrupts by clearing the I bit in the condition code  
register  
• Enables external interrupts by setting the IRQE bit in the IRQ  
status and control register  
• Stops the CPU clock which drives the address and data buses, but  
allows the selected oscillator to continue to clock the core timer,  
programmable timer, analog subsystem, and SIOP  
The WAIT instruction does not affect any other bits, registers, or I/O  
lines.  
General Release Specification  
MC68HC705JJ7/MC68HC705JP7 Rev. 3.0  
Operating Modes  
For More Information On This Product,  
Go to: www.freescale.com