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參數(shù)資料
| 型號： | MR80C52EXXX-25/883 |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁數(shù)： | 14/46頁 |
| 文件大?。?/td> | 4720K |
| 代理商： | MR80C52EXXX-25/883 |
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20
ATtiny20 [DATASHEET]
8235E–AVR–03/2013
Table 6-1.
Start-up Times when Using the Internal Calibrated Oscillator
Notes: 1. After powering up the device or after a reset the system clock is automatically set to calibrated internal 8
MHz oscillator, divided by 8
2. When the Brown-out Detection is enabled, the reset start-up time is 128 ms after powering up the device.
6.4.2
Starting from Power-Down Mode
When waking up from Power-Down sleep mode, the supply voltage is assumed to be at a sufficient level and only the
oscillator start-up time is counted to ensure the stable operation of the oscillator. The oscillator start-up time is counted
on the selected main clock, and the start-up time depends on the clock selected. See Table 6-2 for details.
Table 6-2.
Start-up Time from Power-Down Sleep Mode
Notes: 1. The start-up time is measured in main clock oscillator cycles.
2. When using software BOD disable, the wake-up time from sleep mode will be approximately 60 μs.
6.4.3
Starting from Idle / ADC Noise Reduction / Standby Mode
When waking up from Idle, ADC Noise Reduction or Standby Mode, the oscillator is already running and no oscillator
start-up time is introduced.
6.5
Register Description
6.5.1
CLKMSR – Clock Main Settings Register
Bits 7:2 – Res: Reserved Bits
These bits are reserved and will always read as zero.
Bits 1:0 – CLKMS[1:0]: Clock Main Select Bits
These bits select the main clock source of the system. The bits can be written at run-time to switch the source of the main
clock. The clock system ensures glitch free switching of the main clock source.
The main clock alternatives are shown in Table 6-3.
Reset
Oscillator
Configuration
Total start-up time
64 ms
6 cycles
21 cycles
64 ms + 6 oscillator cycles + 21 system clock cycles (1)(2)
Oscillator start-up time
Total start-up time
6 cycles
6 oscillator cycles (1)(2)
Bit
765432
1
0
–
CLKMS1
CLKMS0
CLKMSR
Read/Write
R
R/W
Initial Value
0
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MR80C86 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
| MR80C86/B | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述:Microprocessor, 16 Bit, 44 Pin, Ceramic, LCC |
| MR80C86-2 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
| MR80C86-2/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MR80C86-2/B | 制造商:Intersil Corporation 功能描述:MPU 80C86 16BIT CMOS 8MHZ 44PLCC - Rail/Tube |
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