at89c5131a ATMEL Corporation, at89c5131a Datasheet - Page 25

• Manufacturer Part Number: at89c5131a
• Description: Usb Microcontrollers
• Manufacturer: ATMEL Corporation

API Commands
Read/Program Flash and
EEPROM Data Memory
4287C–USB–11/04
Several types of APIs are available:
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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 “Pro-
gram/Code Memory” and “EEPROM Data Memory”
Two routines are available to program the Flash:
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Note:
API Name
__api_wr_code_byte
__api_wr_code_page
Read/Program Flash and EEPROM Data Memory
Read Configuration and Manufacturer Information
Program Configuration Information
Erase Flash
Start Bootloader
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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_wr_code_byte
__api_wr_code_page
No special resources are used by the bootloader during this operation
”.
AT89C5131A USB Bootloader
api_command
0Dh
api_dph
api_dpl
api_value
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