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DOC7707 bảng dữ liệu(PDF) 48 Page - List of Unclassifed Manufacturers

tên linh kiện DOC7707
Giải thích chi tiết về linh kiện  Microcontroller with 8/16K Bytes of ISP Flash and USB Controller
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nhà sản xuất  ETC1 [List of Unclassifed Manufacturers]
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48
7707F–AVR–11/10
AT90USB82/162
device is kept in RESET after V
CC rise. The RESET signal is activated again, without any delay,
when V
CC decreases below the detection level.
Figure 9-2.
MCU Start-up, RESET Tied to V
CC
Figure 9-3.
MCU Start-up, RESET Extended Externally
9.4
External Reset
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see Table 9-1) will generate a reset, even if the clock is not running.
Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the
Reset Threshold Voltage – V
RST – on its positive edge, the delay counter starts the MCU after
the Time-out period – t
TOUT – has expired.
Figure 9-4.
External Reset During Operation
V
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
CC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
VCC
CC



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