参数资料
型号: AT90S2313-10PC
厂商: Atmel
文件页数: 32/92页
文件大小: 0K
描述: IC MCU 2K FLSH 10MHZ UART 20DIP
标准包装: 18
系列: AVR® 90S
核心处理器: AVR
芯体尺寸: 8-位
速度: 10MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 15
程序存储器容量: 2KB(1K x 16)
程序存储器类型: 闪存
EEPROM 大小: 128 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 20-DIP(0.300",7.62mm)
包装: 管件
38
AT90S2313
0839I–AVR–06/02
1.
In the same operation, write a logical “1” to WDTOE and WDE. A logical “1” must
be written to WDE even though it is set to 1 before the disable operation starts.
2.
Within the next four clock cycles, write a logical “0” to WDE. This disables the
Watchdog.
Bits 2..0 – WDP2, WDP1, WDP0: Watchdog Timer Prescaler 2, 1 and 0
The WDP2, WDP1 and WDP0 bits determine the Watchdog Timer prescaling when the
Watchdog Timer is enabled. The different prescaling values and their corresponding
time-out periods are shown in Table 14.
Note:
1. The frequency of the Watchdog Oscillator is voltage-dependent, as shown in the
Electrical Characteristics section.
The WDR (Watchdog Reset) instruction should always be executed before the
Watchdog Timer is enabled. This ensures that the reset period will be in accordance
with the Watchdog Timer prescale settings. If the Watchdog Timer is enabled without
reset, the Watchdog Timer may not start counting from zero.
To avoid unintentional MCU Reset, the Watchdog Timer should be disabled or reset
before changing the Watchdog Timer Prescale Select.
Table 14. Watchdog Timer Prescale Select
WDP2
WDP1
WDP0
Number of
WDT Oscillator
Cycles
Typical Time-out
at V
CC =3.0V
Typical Time-out
at V
CC =5.0V
0
16K cycles
47 ms
15 ms
0
1
32K cycles
94 ms
30 ms
0
1
0
64K cycles
0.19 s
60 ms
0
1
128K cycles
0.38 s
0.12 s
1
0
256K cycles
0.75 s
0,24 s
1
0
1
512K cycles
1.5 s
0.49 s
1
0
1,024K cycles
3.0 s
0.97 s
1
2,048K cycles
6.0 s
1.9 s
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