AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 8

• 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

Figure 3. High-pin Count Regular Boot Process
8
AT89C5131A USB Bootloader
S ta rt A p p lica tio n
E N B O O T = 0
P C = 0000h
S ta rt U se r B o o tlo a d e r
Y es
F C O N = 00h
S B V < 7F h
Y es
H ardw are
C ondition
B LJ B = 1
R E S E T
N o
N o
N o
N o
Y es
E N B O O T = 1
F C O N = 0F h
P C = F 400h
Y es
B it E N B O O T in A U XR 1 R egis ter is
Initialized with B LJ B inverted
E N B O O T = 1
F C O N = 00h
P C = F 400h
S ta rt B o o tlo a d e r
4287E–USB–04/08