參數(shù)資料
型號(hào)： MC68HCL05K0DW
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, MICROCONTROLLER, PDSO16
封裝： SOIC-16
文件頁數(shù)： 113/154頁
文件大小： 1544K
代理商： MC68HCL05K0DW
Low-Power Modes
Wait Mode
MC68HC05K0 MC68HC05K1 — Rev. 2.0
Technical Data
MOTOROLA
Low-Power Modes
61
6.4 Wait Mode
The WAIT instruction puts the MCU in an intermediate
power-consumption mode and has these effects on the MCU:
Clears the I bit in the condition code register, enabling interrupts
Sets the IRQE bit in the IRQ status and control register, enabling
external interrupts
Stops the CPU clock, but allows the internal oscillator and timer
clock to continue to run
The WAIT instruction does not affect any other registers or any I/O lines.
These conditions restart the CPU clock and bring the MCU out of wait
mode:
An external interrupt signal on the IRQ/VPP pin — A high-to-low
transition on the IRQ/VPP pin loads the program counter with the
contents of locations $03FA and $03FB.
An external interrupt signal on a port A external interrupt pin — If
the mask option for the port A external interrupt function is
selected, a low-to-high transition on a PA3–PA0 pin loads the
program counter with the contents of locations $03FA and $03FB.
A timer interrupt — A timer overflow or a real-time interrupt request
loads the program counter with the contents of locations $03F8
and $03F9.
A COP watchdog reset — A timeout of the mask-optional COP
watchdog resets the MCU and loads the program counter with the
contents of locations $03FE and $03FF. Software can enable
real-time interrupts so that the MCU can periodically exit wait
mode to reset the COP watchdog.
Low-voltage reset — A low-voltage detect resets the MCU and
loads the program counter with the contents of locations $03FE
and $03FF (if this mask option is selected).
External reset — A logic 0 on the RESET pin resets the MCU and
loads the program counter with the contents of locations $03FE
and $03FF.
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