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參數(shù)資料
| 型號： | 7544 |
| 英文描述： | 3.3V LDO POSITVE VOLTAGE REGULATOR 2% TOL. |
| 中文描述： | 7544Group數(shù)據(jù)表數(shù)據(jù)表503K/JUN.25.03 |
| 文件頁數(shù)： | 35/54頁 |
| 文件大小： | 503K |
| 代理商： | 7544 |
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Rev.1.02 2003.06.25 page 35 of 53
7544 Group
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
G
Oscillation stop detection circuit (Note)
The oscillation stop detection circuit is used for reset occurrence
when a ceramic resonator or an oscillation circuit stops by discon-
nection. When internal reset occurs, reset because of oscillation
stop can be detected by setting
“
1
”
to the oscillation stop detection
status bit.
Also, when using the oscillation stop detection circuit, a built-in
ring oscillator is required.
Figure 46 shows the state transition.
Note:
The oscillation stop detection circuit is not included in the
emulator MCU
“
M37544RSS
”
.
Fig. 43 Structure of MISRG
MISRG(address 0038
16
, initial value: 00
16
)
b7 b0
Oscillation stabilization time set bit after
release of the STP instruction
0: Set
“
01
16
”
in timer1, and
“
FF
16
”
in prescaler 1 automatically
1: Not set automatically
Ceramic/quartz-crystal or RC oscillation
stop detection function active bit
0: Detection function inactive
1: Detection function active
Reserved bits (return
“
0
”
when read)
(Do not write
“
1
”
to these bits)
Disable (return
“
0
”
when read)
Oscillation stop detection status bit
0: Oscillation stop not detected
1: Oscillation stop detected
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