參數(shù)資料
型號(hào)： M37544M2-XXXGP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32
封裝： 7 X 7 MM, 0.80 MM PITCH, LQFP-32
文件頁(yè)數(shù)： 29/44頁(yè)
文件大小： 583K
代理商： M37544M2-XXXGP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7544 Group
MITSUBISHI MICROCOMPUTERS
35
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Som
e parametric
limits
are
subject
to change.
q 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 003816, initial value: 0016)
b7
b0
Oscillation stabilization time set bit after
release of the STP instruction
0: Set “0116” in timer1, and “FF16”
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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