AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 26

• 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

API Commands
Read/Program Flash
and EEPROM Data
Memory
26
AT89C5131A USB Bootloader
Several types of APIs are available:
•
•
•
•
•
All routines to access EEPROM data are managed directly from the application without using
bootloader resources.
To read the Flash memory the bootloader is not involved.
For more details on these routines see the AT89C5131A datasheet sections “Program/Code
Memory” and “EEPROM Data Memory”
Two routines are available to program the Flash:
•
•
•
Note:
Read/Program Flash and EEPROM Data Memory
Read Configuration and Manufacturer Information
Program Configuration Information
Erase Flash
Start Bootloader
–
–
The application program load the column latches of the Flash then calls the
__api_wr_code_byte or __api_wr_code_page see datasheet in section “Program/Code
Memory
Parameter settings
instruction: LCALL FFC0h.
API Name
__api_wr_code_byte
__api_wr_code_page
__api_wr_code_byte
__api_wr_code_page
No special resources are used by the bootloader during this operation
”.
api_command
0Dh
api_dph
api_dpl
api_value
4287E–USB–04/08