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AT85C5122D-RDRUM Folha de dados(PDF) 57 Page - ATMEL Corporation

Nome de Peças AT85C5122D-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

AT85C5122D-RDRUM Folha de dados(HTML) 57 Page - ATMEL Corporation

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AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
Figure 25.
Input with Pull-up
Input with Weak Pull-down
Configuration
The input with pull-down (input WPD) configuration is shown in Figure 26
Figure 26.
Input with Pull-down
Low Speed Output
Configuration
The low speed output with low speed tFALL and tRISE can drive keyboard.
The current limitation of the LED2CTRL block requires a polarisation current of about
250 μA. This block is automatically disabled in power-down mode.
The low speed output configuration (KB_OUT) is shown in Figure 27.
Figure 27.
Low-speed Output
LED Source Current
The LED configuration is shown in Figure 28.
Input
Pin
Data
Weak
P
Medium
P
Stuck to 0 if Medium
Stuck to 0 if Weak
Input
Pin
Data
Weak
N
1
Pin
P
PWEAKCTRL
Port latch
Data
N
N
NMOS
PCON.1
Weak
LED2CTRL



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