AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 3

• 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

Block Diagram
Notes:
4338F–USB–08/07
1. Alternate function of Port 1
2. Alternate function of Port 3
3. Alternate function of Port 4
XTAL1
XTAL2
PSEN
ALE
WR
RD
EA
(2)
(2)
CPU
(2)
(2) (2)
Timer 0
Timer 1
EUART
BRG
(2)
+
CORE
C51
(2) (2)
256x8
RAM
Ctrl
INT
32Kx8 Flash
Port 0Port 1 Port 2 Port 3
Parallel I/O Ports & Ext. Bus
EEPROM
4Kx8
Port 4
ERAM
1Kx8
(1)
(1)
PCA
Board
Key
(1) (1)
Timer2
Watch
Dog
TWI
USB
(1) (1) (1) (1)
Regu-
lator
SPI
VREF
3