- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄25633 > MQ80C52TXXX-12SB (TEMIC SEMICONDUCTORS) 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQFP44 PDF資料下載
參數(shù)資料
| 型號： | MQ80C52TXXX-12SB |
| 廠商： | TEMIC SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQFP44 |
| 文件頁數(shù)： | 11/46頁 |
| 文件大?。?/td> | 4720K |
| 代理商： | MQ80C52TXXX-12SB |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁當(dāng)前第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁
18
ATtiny20 [DATASHEET]
8235E–AVR–03/2013
6.1.4
ADC Clock – clk
ADC
The ADC is provided with a dedicated clock domain. This allows halting the CPU and I/O clocks in order to reduce noise
generated by digital circuitry. This gives more accurate ADC conversion results.
6.2
Clock Sources
All synchronous clock signals are derived from the main clock. The device has three alternative sources for the main
clock, as follows:
External Clock (see page 18)
See Table 6-3 on page 21 on how to select and change the active clock source.
6.2.1
Calibrated Internal 8 MHz Oscillator
The calibrated internal oscillator provides an approximately 8 MHz clock signal. Though voltage and temperature
dependent, this clock can be very accurately calibrated by the user. See Table 20-2 on page 169, and “Internal Oscillator
Speed” on page 200 for more details.
This clock may be selected as the main clock by setting the Clock Main Select bits CLKMS[1:0] in CLKMSR to 0b00.
Once enabled, the oscillator will operate with no external components. During reset, hardware loads the calibration byte
into the OSCCAL register and thereby automatically calibrates the oscillator. The accuracy of this calibration is shown as
Factory calibration in Table 20-2 on page 169.
When this oscillator is used as the main clock, the watchdog oscillator will still be used for the watchdog timer and reset
time-out. For more information on the pre-programmed calibration value, see section “Calibration Section” on page 162.
6.2.2
External Clock
To use the device with an external clock source, CLKI should be driven as shown in Figure 6-2. The external clock is
selected as the main clock by setting CLKMS[1:0] bits in CLKMSR to 0b10.
Figure 6-2.
External Clock Drive Configuration
When applying an external clock, it is required to avoid sudden changes in the applied clock frequency to ensure stable
operation of the MCU. A variation in frequency of more than 2% from one clock cycle to the next can lead to
unpredictable behavior. It is required to ensure that the MCU is kept in reset during such changes in the clock frequency.
6.2.3
Internal 128 kHz Oscillator
The internal 128 kHz oscillator is a low power oscillator providing a clock of 128 kHz. The frequency depends on supply
voltage, temperature and batch variations. This clock may be select as the main clock by setting the CLKMS[1:0] bits in
CLKMSR to 0b01.
EXTERNAL
CLOCK
SIGNAL
CLKI
GND
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC80C52CXXX-16 | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CDIP40 |
| MR80C52EXXX-25/883 | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44 |
| MQ83C154XXX-12/883R | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, CQFP44 |
| MC80C52CXXX-16P883 | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CDIP40 |
| MC80C32-12SBD | 8-BIT, 12 MHz, MICROCONTROLLER, CDIP40 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MQ82370-20 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MQ8238020 | 制造商:Intel 功能描述:CONTROLLER: OTHER |
| MQ82380-20 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MQ82380-20/R | 制造商:Rochester Electronics LLC 功能描述: |
| MQ82592 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。