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AT89C5122DS-RDRUM Folha de dados(PDF) 173 Page - ATMEL Corporation

Nome de Peças AT89C5122DS-RDRUM
Descrição Electrónicos  C51 Microcontroller with USB and Smart Card Reader Interfaces
PDF  208 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5122DS-RDRUM Folha de dados(HTML) 173 Page - ATMEL Corporation

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AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
Reset pin
As explained in the POR section there is no need to use the reset pin as the internal
reset function at power up is ensured by the POR. Anyway, if some applications
requires a long reset, a reset controlled by the user or a reset controlled by external
superviser device, the use of the reset pin is necessary.
Long Reset
As the pad integrates an internal pull-up of 10K, only an external capacitor of at least 10
μF is required to have an impact on the reset duration.
Figure 103.
Long Reset
Reset Controlled by the User
The external capacitor is not needed if no long reset is required.
Figure 104.
Reset Controlled by the User
RST
Vcc
10 K
Internal Reset
Microcontrolleur
10 μF
RST
Vcc
10 K
Internal Reset
Microcontrolleur



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