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T89C51CC02 Datasheet(PDF) 3 Page - ATMEL Corporation |
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T89C51CC02 Datasheet(HTML) 3 Page - ATMEL Corporation |
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3 / 35 page  3 T89C51CC02 CAN Bootloader 4208C–CAN–12/03 ISP Communication Management The purpose of this process is to manage the communication and its protocol between the on-chip bootloader and an external device (host). The on-chip bootloader imple- ments a CAN protocol (see Section “Protocol”, page 9). This process translates serial communication frames (CAN) into Flash memory accesses (read, write, erase...). User Call Management Several Application Program Interface (API) calls are available to the application pro- gram to selectively erase and program Flash pages. All calls are made through a common interface (API calls) included in the bootloader. The purpose of this process is to translate the application request into internal Flash memory operations. Flash Memory Management This process manages low level accesses to the Flash memory (performs read and write accesses). Bootloader Configuration Configuration and Manufacturer Information The following table lists Configuration and Manufacturer byte information used by the bootloader. This information can be accessed by the user through a set of API or ISP command. Mnemonic Description Default Value BSB Boot Status Byte FFh SBV Software Boot Vector FCh P1_CF Port 1 Configuration FEh P3_CF Port 3 Configuration FFh P4_CF Port 4 Configuration FFh SSB Software Security Byte FFh EB Extra Byte FFh CANBT1 CAN Bit Timing 1 FFh CANBT2 CAN Bit Timing 2 FFh CANBT3 CAN Bit Timing 3 FFh NNB Node Number Byte FFh CRIS CAN Relocatable Identifier Segment FFh Manufacturer 58h ID1: Family code D7h ID2: Product Name BBh ID3: Product Revision FFh |
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