參數(shù)資料
型號: MC68HC05CT4FB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.048 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 91/142頁
文件大小: 3470K
代理商: MC68HC05CT4FB
NON-DISCLOSURE
AGREEMENT
REQUIRED
Operating Modes
General Release Specification
MC68HC05CT4 Rev. 2.0
Operating Modes
Figure 6-2. Stop Recovery Timing Diagram
During wait mode, the I bit in the CCR is cleared to enable interrupts. All
other registers, memory, and input/output lines remain in their previous
state. The timer may be enabled to allow a periodic exit from wait mode.
6.4.4 Low-Power Wait
When the wait mode is entered by executing the WAIT instruction, the
oscillator divider changes from a divide-by-5 to a divide-by-40 (additional
divide-by-8) to lower the wait current. As a result, this gives a CPU clock
rate of 256 kHz if the oscillator is running with a 10.24-MHz crystal. The
oscillator divide-by-5 or divide-by-40 option is also controlled by the
speed bit located in the miscellaneous control register ($21).
Section 14. Miscellaneous Register. When returning from wait mode
via an interrupt, the OSC rate prior to entering wait mode is restored.
1FFE
1FFF
INTERNAL
ADDRESS
BUS
INTERNAL
CLOCK
IRQ
3
IRQ
2
RESET
OSC1
1
t
ILCH
4064 tcyc
RESET OR INTERRUPT
VECTOR FETCH
t
LIH
t
RL
NOTES:
1. Represents the internal gating of the OSC1 pin
2. IRQ pin edge-sensitive mask option
3. IRQ pin level- and edge-sensitive mask option
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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