AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 89

• Manufacturer Part Number: AT89C5131A-L
• Manufacturer: Atmel Corporation

Specifications of AT89C5131A-L

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 48 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Sram (kbytes): 1.25
• Eeprom (bytes): 1024
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

Programmable LED
4338F–USB–08/07
AT89C5131A-L have up to 4 programmable LED current sources, configured by the
register LEDCON.
Table 71. LEDCON Register
LEDCON (S:F1h) LED Control Register
Reset Value = 00h
Bit
Number
7:6
5:4
3:2
1:0
7
LED3
Bit
Mnemonic
LED3
LED2
LED1
LED0
6
Description
PortLED3Configuration
0
0
1
1
Port/LED2Configuration
0
0
1
1
Port/LED1Configuration
0
0
1
1
Port/LED0Configuration
0
0
1
1
0Standard C51 Port
1 2 mA current source when P3.7 is low
0 4 mA current source when P3.7 is low
1 10 mA current source when P3.7 is low
0 Standard C51 Port
1 2 mA current source when P3.6 is low
0 4 mA current source when P3.6 is low
1 10 mA current source when P3.6 is low
0 Standard C51 Port
1 2 mA current source when P3.5 is low
0 4 mA current source when P3.5 is low
1 10 mA current source when P3.5 is low
0 Standard C51 Port
1 2 mA current source when P3.3 is low
0 4 mA current source when P3.3 is low
1 10 mA current source when P3.3 is low
5
LED2
4
3
LED1
2
1
LED0
0
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