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AT89C5131A-RDTUM Datasheet(PDF) 92 Page - ATMEL Corporation

Part # AT89C5131A-RDTUM
Description  8-bit Flash Microcontroller with Full Speed USB Device
PDF  188 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTUM Datasheet(HTML) 92 Page - ATMEL Corporation

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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



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