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參數(shù)資料
| 型號(hào)： | MC68HC05C0FN |
| 廠商： | MOTOROLA INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 4 MHz, MICROCONTROLLER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁(yè)數(shù)： | 28/96頁(yè) |
| 文件大?。?/td> | 357K |
| 代理商： | MC68HC05C0FN |
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Low-Power Modes
MOTOROLA
Page 25
MC68HC05C0 Specification Rev. 1.2
SECTION 6
LOW-POWER MODES
6.1
STOP
The STOP instruction places the MCU in its lowest power consumption mode. In STOP
mode, the internal oscillator is turned off, halting all internal processing, including both
timers (Multi-Function Timer with COP and 16-Bit Timer).
When the CPU enters STOP Mode the interrupt flags (TOF and RTIF) and the interrupt
enable bits (TOFE and RTIE) in the TCSR are cleared by internal hardware to remove any
pending timer interrupt requests and to disable any further timer interrupts. Execution of the
STOP instruction automatically clears the I-bit in the Condition Code Register and sets the
IRQE enable bit in the External Interrupt Control/Status Register so that the IRQ external
interrupt is enabled. All other registers, including the other bits in the TCSR, and memory
remain unaltered. All input/output lines remain unchanged. The processor can be brought
out of the STOP mode only by an external interrupt, KEY interrupt, or RESET.
6.1.1
STOP RECOVERY
A STOP recovery time of 1024 (Fast) or 4064 (Normal) is selectable in the Configuration
Register. The crystal or ceramic resonator must assume stable condition before the
selected stop recovery time elapses, under all possible operating conditions. This will
ensure correct general operation of the 68HC05C0 when STOP mode is exited. See
NOTE:
The contents of the Configuration Register are reset by any of the five
reset conditions. Therefore, if RESET is used to bring the part out of
STOP mode, the STOP recovery will always be 4064 cycles, even if the
fast (1024) recovery time was selected in the Configuration Register.
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