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參數(shù)資料
| 型號： | ATtiny28L |
| 廠商： | Atmel Corp. |
| 英文描述： | 8-Bit AVR Microcontroller with 2K bytes Flash(8位AVR技術(shù)微控制器(帶2K字節(jié)閃速存儲器)) |
| 中文描述： | 8位AVR微控制器與2K字節(jié)的閃存（8位AVR的技術(shù)微控制器（帶2K字節(jié)閃速存儲器）） |
| 文件頁數(shù)： | 67/81頁 |
| 文件大?。?/td> | 663K |
| 代理商： | ATTINY28L |
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7
ATtiny28L/V
1062F–AVR–07/06
System Clock and
Clock Options
The device has the following clock source options, selectable by Flash Fuse bits as
shown in Table 1.
Note:
“1” means unprogrammed, “0” means programmed.
The various choices for each clocking option give different start-up times as shown in
Internal RC Oscillator
The internal RC oscillator option is an on-chip calibrated oscillator running at a nominal
frequency of 1.2 MHz. If selected, the device can operate with no external components.
The device is shipped with this option selected.
Calibrated Internal RC
Oscillator
The calibrated internal oscillator provides a fixed 1.2 MHz (nominal) clock at 3V and
25
°C. This clock may be used as the system clock. This oscillator can be calibrated by
writing the calibration byte to the OSCCAL register. When this oscillator is used as the
chip clock, the Watchdog oscillator will still be used for the Watchdog Timer and for the
reset time-out. For details on how to use the pre-programmed calibration value, see the
section “Calibration Byte” on page 46.
Crystal Oscillator
XTAL1 and XTAL2 are input and output, respectively, of an inverting amplifier, which
can be configured for use as an on-chip oscillator, as shown in Figure 5. Either a quartz
crystal or a ceramic resonator may be used. When the INTCAP fuse is programmed,
internal load capacitors with typical values 50 pF are connected between XTAL1/XTAL2
and ground.
Figure 5. Oscillator Connections
Note:
1. When using the MCU oscillator as a clock for an external device, an HC buffer should
be connected as indicated in the figure.
External Clock
To drive the device from an external clock source, XTAL2 should be left unconnected
while XTAL1 is driven as shown in Figure 6.
Table 1. Device Clocking Option Select
Clock Option
CKSEL3..0
External Crystal/Ceramic Resonator
1111 - 1010
External Low-frequency Crystal
1001 - 1000
External RC Oscillator
0111 - 0101
Internal RC Oscillator
0100 - 0010
External Clock
0001 - 0000
XTAL2
XTAL1
GND
C2
C1
MAX 1 HC BUFFER
HC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ATTINY28L_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 2K Bytes of Flash |
| ATTINY28L-4AC | 功能描述:8位微控制器 -MCU AVR 2K FLASH 28 PIN PACKAGE - 3V 4MHZ RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ATTINY28L-4AI | 功能描述:8位微控制器 -MCU AVR 2K FLASH 28 PIN PACKAGE - 3V 4MHZ RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ATTINY28L-4AU | 功能描述:8位微控制器 -MCU AVR 2K FLASH 28 PIN PACKAGE - 3V 4MHZ RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ATTINY28L-4AUR | 功能描述:8位微控制器 -MCU AVR 2K FL 4MHZ IND TEMP 3V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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