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參數資料
型號: MC68HC05C9A
廠商: Motorola, Inc.
元件分類: 8位微控制器
英文描述: 8-Bit Microcontroller(8位微控制器)
中文描述: 8位微控制器(8位微控制器)
文件頁數: 45/160頁
文件大小: 783K
代理商: MC68HC05C9A
Resets
RESET Pin
MC68HC05C9A
Rev. 4.0
General Release Specification
MOTOROLA
Resets
45
L
G
R
5.4 RESET Pin
The MCU is reset when a logic zero is applied to the RESET input for a
period of one and one-half machine cycles (t
RL
). However, in order to
differentiate between an external reset and an internal reset (generated
from the COP or clock monitor), any externally driven reset must be
active (logic zero) for at least eight t
CYC
.
Figure 5-2. Power-On Reset and RESET
RESET
OSC12
INTERNAL
CLOCK1
INTERNAL
ADDRESS
BUS1
VDD
INTERNAL
DATA
BUS1
tRL
NEW
PCH
NEW
PCL
OP
CODe
OP
CODE
PCH
PCL
3
tCYC
4064tCYC
tVDDR
DUMMY
3FFF
NEW
PC
NEW
PC
3FFE
3FFE
3FFE
NEW
PC
NEW
PC
3FFE
3FFF
3FFE
DUMMY
NOTES:
1. Internal timing signal and bus information are not available externally.
2. OSC1 line is not meant to represent frequency. It is only meant to represent time.
3. The next rising edge of the internal processor clock following the rising edge of RESET initiates the reset sequence.
4. RESET outputs V
OL
during 4064 power-on reset cycles.
4
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