83C5121-IL Просмотр технического описания (PDF) - Atmel Corporation

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83C5121-IL

8-bit Microcontroller with Multiprotocol Smart Card Interface

Atmel Corporation 

Figure 6. Push-pull Output Configuration

P

Strong

PMOS

A/T8xC5121

Port latch

Data

Pin

N

NMOS

Input

Data

LED Output Configuration

The input only configuration is shown in Figure 7.

Figure 7. LED Source Current Configuration

2 CPU

CLOCK DELAY

P

PMOS Strong

P

Weak

P

Medium

LEDx.0

Port Latch

Data

LEDx.1

Pin

NMOS

N

LED1CTRL

LED2CTRL

N

N

Input

Data

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.

11

4164G–SCR–07/06

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