參數(shù)資料
型號: M37281MFH-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-52
文件頁數(shù): 26/172頁
文件大?。?/td> 1319K
代理商: M37281MFH-XXXSP
Rev.1.01
2003.07.16
page 121 of 170
M37281MAH–XXXSP,M37281MFH–XXXSP,M37281MKH–XXXSP, M37281EKSP
Fig.8.14.4 State Transitions of System Clock
Reset
The example assumes that 8 MHz is being applied to the XIN pin and 32 kHz to the XCIN pin. The
φ indicates the internal clock.
WIT instruction
CM7 : Internal system clock selection bit
0 : XIN-XOUT selected (high-speed mode)
1 : XCIN-XCOUT selected (low-speed mode)
CPU mode register
(Address : 00FB16)
CM6 : Main clock (XIN–XOUT) stop bit
0 : Oscillating
1 : Stopped
8 MHz oscillating
32 kHz oscillating
φ is stopped (HIGH)
Timer operating
8 MHz oscillating
32 kHz oscillating
f(
φ) = 4 MHz
8 MHz stopped
32 kHz stopped
φ is stopped (HIGH)
8 MHz oscillating
32 kHz oscillating
φ is stopped (HIGH)
Timer operating
(Note 3)
8 MHz oscillating
32 kHz oscillating
f(
φ) = 16 kHz
8 MHz stopped
32 kHz stopped
φ is stopped (HIGH)
8 MHz stopped
32 kHz stopped
φ = stopped (HIGH )
8 MHz stopped
32 kHz oscillating
f(
φ) = 16 kHz
8 MHz stopped
32 kHz oscillating
φ is stopped (HIGH)
Timer operating
(Note 3)
Interrupt
STP instruction
Interrupt (Note 1)
WIT instruction
Interrupt
WIT instruction
Interrupt
STP instruction
Interrupt (Note 2)
STP instruction
Interrupt (Note 2)
CM7 = 1
CM7 = 0
CM6 = 1
CM6 = 0
External INT,
timer interrupt,
or SI/O interrupt
External INT
Notes 1: When the STP state is ended, a delay of approximately 4 ms is automatically generated by timer 3 and timer 4.
2: The delay after the STP state ends is approximately 1 s.
3: When the internal clock
φ divided by 8 is used as the timer count source, the frequency of the count source is 2 kHz.
The program must
allow time for 8 MHz
oscillation to stabilize
High-speed operation start
mode
相關(guān)PDF資料
PDF描述
M37281MAH-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37281EKSP 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37281MFH-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37281MAH-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37281MKH-XXXSP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP52
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