參數(shù)資料
型號: IT80C52XXX-16SHXXX
廠商: TEMIC SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
文件頁數(shù): 9/81頁
文件大?。?/td> 663K
代理商: IT80C52XXX-16SHXXX
17
ATtiny28L/V
1062F–AVR–07/06
activated again, without any delay, when the V
CC decreases below detection level. See
If the built-in start-up delay is sufficient, RESET can be connected to VCC directly or via
an external pull-up resistor. By holding the RESET pin low for a period after V
CC has
been applied, the Power-on Reset period can be extended. Refer to Figure 18 for a tim-
ing example of this.
Figure 17. MCU Start-up, RESET Tied to VCC.
Figure 18. MCU Start-up, RESET Controlled Externally
External Reset
An external reset is generated by a low level on the RESET pin. Reset pulses longer
than 50 ns will generate a reset, even if the clock is not running. Shorter pulses are not
guaranteed to generate a reset. When the applied voltage reaches the Reset Threshold
Voltage (V
RST) on its positive edge, the delay timer starts the MCU after the Time-out
period (t
TOUT) has expired.
VCC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
VCC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
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