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| 型號(hào)： | M37641M8 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 64/149頁(yè) |
| 文件大?。?/td> | 1997K |
| 代理商： | M37641M8 |
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64
7641 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
Fig. 57 Special count source generator block diagram
COUNT SOURCE GENERATOR
The 7641 Group has a built-in special count source generator,
SCSG. This generator consists of two 8-bit timers: SCSG1 and
SCSG2. The output of the special count source generator can be
used as a clock source for the timer X, serial I/O and two UARTs.
SCSG Operation
Timers SCSG1 and SCSG2 are both down count timers. When the
count reaches “0”, an underflow occurs at the next count source
rising edge and the contents of the corresponding timer latch are
loaded to the timer. The division ratio of each SCSG-x timer is
given by 1 / (n+1), where “n” is the value set to the SCSG-x timer.
The output of Timer SCSG1 is ANDed with the original clock (
φ
) to
make a count source for Timer SCSG2.
The SCSG output is Clock SCSGCLK. The frequency is calculated
as follows:
SCSGCLK =
φ
{n1 / (n1+1)}
{1 / (n2+1)}
n1: value set to SCSG1
n2: value set to SCSG2
If the SCSG1 Count Stop Bit (SCSGM1) is set to “1”, or Timer
SCSG1 is set to “0”, the SCSG1 count stops. When this happens,
the count source for Timer SCSG2 becomes
φ
.
Data Write Control
When the SCSG1 Data Write Control Bit or SCSG2 Data Write
Control Bit is set to “0”, and data is written to the SCSG-x timer;
the data is written to the corresponding latch and timer at the
same time. When that bit is set to “1”, the data is only written to
the latch.
SCSGCLK
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SCSG1 data write control bit
SCSG2 data write control bit
SCSG2 Timer Reload Latch
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| M37641F8FP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641F8HP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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| M37641M8-XXXHP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| M37641M8-100FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641M8E8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641M8M8-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641M8-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37641M8-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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