參數資料
型號: MC68HC05P9AP
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數: 51/158頁
文件大小: 1106K
代理商: MC68HC05P9AP
Resets and Interrupts
Resets
MOTOROLA
Resets and Interrupts
51
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:
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.
INTERNAL
DATA BUS
1FFE
1FFE
1FFE
1FFE
1FFE
1FFF
(NOTE 1)
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:
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.
INTERNAL
DATA BUS
1FFE
1FFE
1FFE
1FFE
1FFF
NEW PC
NEW
PCH
t
RL
NEW PC
NEW
PCL
DUMMY
OP
CODE
RESET
7-mc68hc05p9a
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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