參數(shù)資料
型號： MC68HC705K1CP
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, MICROCONTROLLER, PDIP16
封裝： PLASTIC, DIP-16
文件頁數(shù)： 96/140頁
文件大小： 1219K
代理商： MC68HC705K1CP
Low-Power Modes
Halt Mode
MC68HC705K1 — Rev. 2.0
Technical Data
MOTOROLA
Low-Power Modes
59
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 PIRQ bit in the mask option register is programmed to a
logic 1, 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 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.
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.
6.5 Halt Mode
The STOP instruction puts the MCU in halt mode if the SWAIT bit in the
mask option register is programmed to a logic 1. Halt mode is identical
to wait mode, except that a recovery delay of 1–4064 internal clock
cycles occurs when the MCU exits halt mode. When the SWAIT bit is set,
the COP watchdog cannot be inadvertently turned off by a STOP
instruction.
Figure 6-1 shows the sequence of events in stop, wait, and halt modes.
相關PDF資料
PDF描述
MC68HC705K1P 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PDIP16
MC68HC705K1DW 8-BIT, OTPROM, MICROCONTROLLER, PDSO16
MC68HC705KJ1CDW 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO16
MC68HC705KJ1CS 8-BIT, UVPROM, 4 MHz, MICROCONTROLLER, CDIP16
MC68HRC705KJ1CS 8-BIT, UVPROM, 4 MHz, MICROCONTROLLER, CDIP16
相關代理商/技術參數(shù)
參數(shù)描述
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MC68HC705L32FU 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
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MC68HC705MC4CDW 制造商:Motorola 功能描述:MOTOROLA S7D9B
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