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參數(shù)資料
| 型號(hào)： | M30245FCGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100 |
| 文件頁(yè)數(shù)： | 206/268頁(yè) |
| 文件大?。?/td> | 2520K |
| 代理商： | M30245FCGP |
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M30245 Group
System Clock
Rev.2.00
Oct 16, 2006
page 40 of 264
REJ03B0005-0200
Clock Control
Main clock
The main clock is generated by the main clock oscillation circuit. After a reset, this clock is divided by 8 to produce the
BCLK. The clock can be stopped using the main clock stop bit (bit 5 at address 000616). Stopping the clock, after
switching the operating clock source of CPU to the subclock, reduces the power dissipation.
After the oscillation of the main clock oscillation circuit has stabilized, the drive capacity of the main clock oscillation
circuit can be reduced using the XIN-XOUT drive capacity select bit (bit 5 at address 000716). Reducing the drive capacity
of the main clock oscillation circuit reduces power dissipation. This bit changes to "1" when shifting from high-speed/
medium-speed mode to stop mode and at a reset. When shifting from low-speed/low power dissipation mode to stop
mode, the value before stop mode is retained.
Subclock
The subclock is generated by the subclock oscillation circuit. No subclock is generated after a reset. After oscillation is
started using the port Xc select bit (bit 4 at address 000616), the subclock can be selected as the BCLK by using the
system clock select bit (bit 7 at address 000616). However, be sure that the subclock oscillation has fully stabilized
before switching.
After the oscillation of the subclock oscillation circuit has stabilized, the drive capacity of the subclock oscillation circuit
can be reduced using the XCIN-XCOUT drive capacity select bit (bit 3 at address 000616). Reducing the drive capacity of
the subclock oscillation circuit reduces the power dissipation. This bit changes to "1" when changing to stop mode and
at a reset.
BCLK
The BCLK is the clock that drives the CPU, and is equal to fc or the clock that is derived by dividing the main clock by 1,
2, 4, 8, or 16. The BCLK is derived by dividing the main clock by 8 after a reset. The BCLK signal can be output from the
BCLK pin (P53) by use of the BCLK output disable bit (bit 7 at address 000416) in the memory expansion and the
microprocessor modes.
The main clock division select bit 0 (bit 6 at address 000616) changes to "1" when shifting from high-speed/medium-
speed to stop mode and at reset. When shifting from low-speed/low power dissipation mode to stop mode, the value
before stop mode is retained.
Peripheral function clock (f1, f8, f32, f1SIO2, f8SIO2, f32SIO2, fAD)
The clock for the peripheral devices is derived from the main clock or by dividing it by 1, 8, or 32. The peripheral function
clock is stopped by stopping the main clock or by setting the WAIT peripheral function clock stop bit (bit 2 at 000616) to
"1" and then executing a WAIT instruction.
fc32
This clock is derived by dividing the subclock by 32. It is used for the Timer A counts.
fc
This clock has the same frequency as the subclock. It is used for the BCLK and for the watchdog timer.
fUSB
This clock provides a 48 MHz signal required for USB operation. It is derived from the Frequency Synthesizer circuit.
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| M30260M3A-XXXGP-U5 | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP48 |
| M30260M8A-XXXGP-U5 | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP48 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M30245FCGP#U1 | 功能描述:IC M16C/24 MCU FLSH 128K 100LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:M16C™ M16C/20 標(biāo)準(zhǔn)包裝:1 系列:87C 核心處理器:MCS 51 芯體尺寸:8-位 速度:16MHz 連通性:SIO 外圍設(shè)備:- 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:8KB（8K x 8） 程序存儲(chǔ)器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4 V ~ 6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:外部 工作溫度:0°C ~ 70°C 封裝/外殼:44-DIP 包裝:管件 其它名稱:864285 |
| M30245FC-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245FC-XXXGF | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245FC-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245FG | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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