参数资料
型号: MC68HC05P9AMDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 106/158页
文件大小: 3885K
代理商: MC68HC05P9AMDW
Resets and Interrupts
Resets
Resets and Interrupts
Figure 18. Power-On Reset Timing
External Reset
A logic 0 applied to the RESET pin for one and one-half t
CYC generates
an external reset. A Schmitt trigger senses the logic level at the RESET
pin.
Figure 19. External Reset Timing
1FFE
4064 t
CYC
V
DD
OSC1 PIN
INTERNAL
CLOCK
INTERNAL
ADDRESS BUS
NOTES:
INTERNAL
DATA BUS
1FFE
1FFF
(NOTE 1)
1. Power-on reset threshold is typically between 1 V and 2 V.
2. Internal clock, internal address bus, and internal data bus are not available externally.
NEW
PCH
NEW
PCL
Table 11. External Reset Timing
Characteristic
Symbol
Min
Max
Unit
RESET Pulse Width
t
RL
1.5
t
CYC
INTERNAL
CLOCK
INTERNAL
ADDRESS BUS
NOTES:
INTERNAL
DATA BUS
1FFE
1FFF
NEW PC
1. Internal clock, internal address bus, and internal data bus are not available externally.
2. The next rising edge of the internal clock after the rising edge of RESET initiates the reset sequence.
NEW
PCH
t
RL
NEW PC
NEW
PCL
DUMMY
OP
CODE
RESET
7-mc68hc05p9a
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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