參數(shù)資料
型號： 7641
英文描述： 7641 Group Datasheet Datasheet 2145K/MAR.26.02
中文描述： 7641組數(shù)據(jù)表數(shù)據(jù)表2145K/MAR.26.02
文件頁數(shù)： 65/137頁
文件大?。?/td> 2145K
代理商： 7641
64
7641 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
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.
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SCSG1 Timer (8)
SCSG1 data write control bit
SCSG2 data write control bit
SCSG2 Timer Reload Latch
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SCSGCLK output control bit
SCSG1 count stop bit
SCSG1 count stop bit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
764-1"x36yd-Black 功能描述:膠帶 BLACK 1X36YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
764-1"x36yd-Blue 功能描述:膠帶 764 BLUE 1X36YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
764-1"x36yd-Green 功能描述:膠帶 GREEN 1X36YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
764-1"x36yd-Orange 功能描述:膠帶 764 ORANGE 1X36 YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
764-1"x36yd-Red 功能描述:膠帶 764 RED 1X36 YD BULK RoHS:否 制造商:3M Electronic Specialty 產(chǎn)品:Tapes 類型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 顏色: 材料:Copper Foil 寬度:1 in x 18 yds
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