Rainbow Electronics AT89C5131 - Manual (Page 103)

103
AT89C5131
4136A–USB–03/03
Programmable LED
AT89C5131 have up to 4 programmable LED current sources, configured by the regis-
ter LEDCON.
Reset Value = 00h
Table 75. 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 LED0 Configuration
0 0 Standard C51 Port
0 1 2 mA current source when P3.7 is O
1 0 4 mA current source when P3.7 is O
1 1 10 mA current source when P3.7 is O
5:4 LED2
Port LED0 Configuration
0 0 Standard C51 Port
0 1 2 mA current source when P3.6 is O
1 0 4 mA current source when P3.6 is O
1 1 10 mA current source when P3.6 is O
3:2 LED1
Port LED0 Configuration
0 0 Standard C51 Port
0 1 2 mA current source when P3.5 is O
1 0 4 mA current source when P3.5 is O
1 1 10 mA current source when P3.5 is O
1:0 LED0
Port LED0 Configuration
0 0 Standard C51 Port
0 1 2 mA current source when P3.3 is O
1 0 4 mA current source when P3.3 is O
1 1 10 mA current source when P3.3 is O