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T89C5121 Datasheet(PDF) 11 Page - ATMEL Corporation

Part # T89C5121
Description  8-bit Microcontroller with Multiprotocol Smart Card Interface
PDF  115 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C5121 Datasheet(HTML) 11 Page - ATMEL Corporation

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A/T8xC5121
4164G–SCR–07/06
Figure 6. Push-pull Output Configuration
LED Output Configuration
The input only configuration is shown in Figure 7.
Figure 7. LED Source Current Configuration
Note:
The port can be configured in quasi bi-directional mode and the level of current can be programmed by means of LEDCON0
and LEDCON1 registers before switching the led on by writing a logical 0 in Port latch.
Input
Pin
Strong
N
P
Port latch
Data
Data
PMOS
NMOS
Pin
Port Latch
Data
Input
Data
LEDx.0
LEDx.1
P
N
N
N
Weak
2 CPU
P
CLOCK DELAY
PMOS
Strong
Medium
P
NMOS
LED1CTRL
LED2CTRL



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