參數(shù)資料
型號(hào)： ATTINY28L
廠商： Atmel Corp.
英文描述： 8-bit AVR Microcontroller with 2K Bytes of Flash
中文描述： 8位AVR微控制器與2K字節(jié)的閃存
文件頁(yè)數(shù)： 31/81頁(yè)
文件大小： 663K
代理商： ATTINY28L
37
ATtiny28L/V
1062F–AVR–07/06
Watchdog Timer
The Watchdog Timer is clocked from a separate on-chip oscillator. By controlling the
Watchdog Timer prescaler, the Watchdog reset interval can be adjusted as shown in
Table 15. See characterization data for typical values at other V
CC levels. The WDR
(Watchdog Reset) instruction resets the Watchdog Timer. Eight different clock cycle
periods can be selected to determine the reset period. If the reset period expires without
another Watchdog reset, the ATtiny28 resets and executes from the reset vector. For
timing details on the Watchdog reset, refer to page 18.
To prevent unintentional disabling of the Watchdog, a special turn-off sequence must be
followed when the Watchdog is disabled. Refer to the description of the Watchdog Timer
Control Register for details.
Figure 30. Watchdog Timer
Register Description
Watchdog Timer Control
Register – WDTCR
Bits 7..5 - Res: Reserved Bits
These bits are reserved bits in the ATtiny28 and will always read as zero.
Bit 4 – WDTOE: Watchdog Turn-off Enable
This bit must be set (one) when the WDE bit is cleared. Otherwise, the Watchdog will
not be disabled. Once set, hardware will clear this bit to zero after four clock cycles.
Refer to the description of the WDE bit for a Watchdog disable procedure.
Bit 3 – WDE: Watchdog Enable
When the WDE is set (one), the Watchdog Timer is enabled and if the WDE is cleared
(zero), the Watchdog Timer function is disabled. WDE can only be cleared if the
WDTOE bit is set (one). To disable an enabled Watchdog Timer, the following proce-
dure must be followed:
1 MHz at V
CC = 5V
350 kHz at V
CC = 3V
110 kHz at V
CC = 2V
Oscillator
Bit
765
4
3
210
$01
–
WDTOE
WDE
WDP2
WDP1
WDP0
WDTCR
Read/Write
R
R/W
Initial Value
0
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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(chēng):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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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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