Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller LQFP 64 (10x10) 8-Bit 48 MHz I/O number 34

92

4337K–USB–04/08

AT89C5130A/31A-M

18. Programmable LED

AT89C5130A/31A-M have up to 4 programmable LED current sources, configured by the regis-

ter LEDCON.

Reset Value = 00h

Table 18-1. LEDCON Register

LEDCON (S:F1h) LED Control Register

7 6 5 4 3 2 1 0

LED3 LED2 LED1 LED0

Bit Number

Bit

Mnemonic Description

7:6 LED3

Port LED3 Configuration

0 0 Standard C51 Port

0 1 2 mA current source when P3.7 is low

1 0 4 mA current source when P3.7 is low

1 1 10 mA current source when P3.7 is low

5:4 LED2

Port /LED2 Configuration

0 0 Standard C51 Port

0 1 2 mA current source when P3.6 is low

1 0 4 mA current source when P3.6 is low

1 1 10 mA current source when P3.6 is low

3:2 LED1

Port/ LED1 Configuration

0 0 Standard C51 Port

0 1 2 mA current source when P3.5 is low

1 0 4 mA current source when P3.5 is low

1 1 10 mA current source when P3.5 is low

1:0 LED0

Port/ LED0 Configuration

0 0 Standard C51 Port

0 1 2 mA current source when P3.3 is low

1 0 4 mA current source when P3.3 is low

1 1 10 mA current source when P3.3 is low