at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 175
at83c5122
Manufacturer Part Number
at83c5122
Description
At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
Manufacturer
ATMEL Corporation
Datasheet
1.AT83C5122.pdf
(213 pages)
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Reset pin
Long Reset
Reset Controlled by the User
4202E–SCR–06/06
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.
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 104. Long Reset
The external capacitor is not needed if no long reset is required.
Figure 105. Reset Controlled by the User
10 µF
RST
RST
Vcc
Vcc
10 K
10 K
Microcontrolleur
Microcontrolleur
Internal Reset
Internal Reset
AT8xC5122/23
175
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