T83C5121 datasheet(55/110 Pages) ATMEL

tên linh kiện	T83C5121

Giải thích chi tiết về linh kiện	8-bit Microcontroller with Multi protocol SMART Card Interface

PDF	110 Pages

Scroll/Zoom	100%

nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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55 / 110 page

T8xC5121

4164E–SCR–02/04

LED Ports

Configuration

The current source of the LED Ports can be adjusted to 3 different values: 2, 4 or 10 mA.

The LED output is an alternate function of P3.6 an P3.7 and cannot be used while the

alternate card function is used.

The control register LEDCON is detailed below.

Registers Definition

Table 40. LEDCON Register

Reset Value = XXXX 0000b

LED1[1]

LED1[0]

LED0[1]

LED0[0]

Bit

Number

Bit

Mnemonic

Description

7 - 4

Reserved

The value read from this bit is indeterminate. Do not set this bit.

3 - 2

LED1[1,0]

Port LED1 configuration:

LED1[1] LED1[0]

Configuration

Standard C51 port

2 mA current source when P3.7 is at Low Level

4 mA current source when P3.7 is at Low Level

10 mA current source when P3.7 is at Low Level

1 - 0

LED0[1,0]

Port LED0 configuration:

LED0[1] LED0[0]

Configuration

standard C51 port

2 mA current source when P3.6 is at Low Level

4 mA current source when P3.6 is at Low Level

10 mA current source when P3.6 is at Low Level

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