AT89C51CC02 Atmel Corporation, AT89C51CC02 Datasheet

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Features • Protocol – CAN Used as a Physical Layer – 7 ISP CAN Identifiers – Relocatable ISP CAN Identifiers – Autobaud • In-System Programming – Read/Write Flash and EEPROM Memory – Read Device ID – Full-chip Erase – Read/Write ...

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Functional The T89C51CC02 Bootloader facilitates In-System Programming and In-Application Programming. Description In-System The ISP allows the user to program or reprogram a microcontroller on-chip Flash memory with- out removing it from the system and without the need of a pre-programmed ...

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ISP Communication The purpose of this process is to manage the communication and its protocol between the on- Management chip bootloader and an external device (host). The on-chip bootloader implements a CAN proto- col (see Section “Protocol”, page 9). This ...

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Mapping and Default The 4 Most Significant Bit (MSB) of the Hardware Byte can be read/written by software (this area Value of Hardware is called Fuse bits). The 4 Least Significant Bit (LSB) can only be read by software and ...

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Software Boot The Software Boot Vector (SBV) forces the execution of a user bootloader starting at address Vector [SBV]00h in the application area (FM0). The way to start this user bootloader is described in the section “Boot Process”. Figure 2. ...

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In-System The ISP allows the user to program or reprogram a microcontroller’s on-chip Flash memory through the CAN network without removing it from the system and without the need of a pre-pro- Programming grammed application. (ISP) This section describes how ...

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Figure 3. Regular Boot Process Yes Start Application 4208D–CAN–03/08 T89C51CC02 CAN Bootloader RESET ENBOOT = 0 Yes PC = 0000h BLJB = 1 No P1_CF = FFh No P1_CF = P1 Yes No P3_CF = P3 BSB = 0 No ...

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Physical Layer The CAN is used to transmit information has the following configuration: • Standard Frame CAN format 2.0A (identifier 11-bit) • Frame: Data Frame • Baud rate: autobaud is performed by the bootloader CAN Controller Two ways are possible ...

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CAN Autobaud The following table shows the autobaud performance for a point-to-point connection in X1 mode. 20K 100K 125K 250K 500K 1M Note: CAN Autobaud The CAN Autobaud implemented in the bootloader is efficient only in point-to-point connection. Limitation Because ...

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Identifier ID_PROG_START ID_PROG_DATA ID_DISPLAY_DATA ID_WRITE_COMMAND ID_READ_COMMAND ID_ERROR It is possible to allocate a new value for CAN ISP identifiers by writing the byte CRIS with the base value for the group of identifier. The maximum value for CRIS is 7Fh ...

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Figure 5. Identifier Remapping Communication The communication with a device (CAN node) must be opened prior to initiating any ISP Initialization communication. To open the communication with the device, the Host sends a “connecting” CAN message (ID_SELECT_NODE) with the node ...

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Request from Host Note: Answers from Bootloader Note: If the communication is closed then all the others messages won’t be managed by bootloader. ID_SELECT_NODE Flow Description Host Send Select Node Message with Node Number in Parameter OR Time-out 10 ms ...

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Programming the The communication flow described above shows how to program data in the Flash memory or in Flash or EEPROM data the EEPROM data memory. This operation can be executed only with a device previously opened in communication. 1. ...

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Answers from The device has two possible answers: Bootloader • If the device is ready to receive new data, it sends a “programming data” CAN message (Id_prog_data) with the result Command_new passed in parameter. • If the device has finished ...

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Programming Example Programming Data (write 55h from 0000h to 0008h in the flash) HOST BOOTLOADER HOST BOOTLOADER HOST BOOTLOADER Programming Data (write 55h from 0000h to 0008h in the flash), with SSB in write security HOST BOOTLOADER Reading the Flash ...

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Answer to a blank check command: ID_DISPLAY_DATA ID_DISPLAY_DATA Flow Description Host Send Display_data Message with Addresses or Blank Check OR Wait ERROR COMMAND ABORTED OR Wait Data Display All Data Read COMMAND FINISHED OR Wait COMMAND_OK COMMAND FINISHED Wait COMMAND_OK ...

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ID_Display_DATA Example Display Data (from 0000h to 0008h) HOST BOOTLOADER BOOTLOADER Blank Check HOST BOOTLOADER Programming The ID_WRITE_COMMAND flow described below allows the user to program Configuration Configuration Information regarding the bootloader functionalities. Information This operation can be executed only ...

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Requests from Host ID_WRITE_COMMAND Answers from The device has two possible answers: Bootloader • If the chip is protected from program access an “Error” CAN message is sent (see Section “Error Message Description”, page 23). • Otherwise an acknowledge “Command ...

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ID_WRITE_COMMAND Flow Description Host Send Write_Command OR Wait ERROR_SECURITY COMMAND ABORTED Wait COMMAND_OK COMMAND FINISHED ID_WRITE_COMMAND Example Write BSB at 88h HOST BOOTLOADER Write Fuse bit at Fxh HOST BOOTLOADER Reading Configuration The ID_READ_COMMAND flow described below allows the user ...

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Requests from Host ID_READ_COMMAND Answers from The device has two possible answers: Bootloader • If the chip is protected from read access an “Error” CAN message is sent (see Section “Error Message Description”, page 23). • Otherwise the device answers ...

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Flow Description Host Send read_com message OR Wait ERROR_SECURITY COMMAND ABORTED Wait Value of data COMMAND FINISHED ID_READ_COMMAND Example Read Bootloader Version HOST BOOTLOADER Read SBV HOST BOOTLOADER Read Fuse bit HOST BOOTLOADER 4208D–CAN–03/08 T89C51CC02 CAN Bootloader ID_READ_COM MESSAGE ID_ERROR ...

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Erasing the Flash The ID_WRITE_COMMAND flow described below allows the user to erase the Flash memory. This operation can be executed only with a device previously opened in communication. Two modes of Flash erasing are possible: • Full-chip erase • ...

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Starting the The ID_WRITE_COMMAND flow described below allows to start the application directly from Application the bootloader upon a specific command reception. This operation can be executed only with a device previously opened in communication. Two options are possible: • ...

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In-Application The IAP allows to reprogram a microcontroller’s on-chip Flash memory without removing it from the system and while the embedded application is running. Programming/S The user application can call some Application Programming Interface (API) routines allowing elf- IAP. These ...

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API Commands Several types of APIs are available: • Read/Program Flash and EEPROM Data memory • Read Configuration and Manufacturer Information • Program Configuration Information • Erase Flash • Start Bootloader Read/Program Flash All routines to access EEPROM Data are ...

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Instruction: LCALL FFF0h. • At the complete API execution by the bootloader, the value to read is in the api_value variable. Note: Program • Parameter Settings Configuration Information • Instruction: LCALL FFF0h. Note: Erasing Flash The T89C51CC02 Flash ...

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Starting the There are two start bootloader routines possible: Bootloader 1. This routine allows to start at the beginning of the bootloader or after a reset. After calling this routine the regular boot process is performed and the communication must ...

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Appendix-A Table 1. Summary of Frames from Host Identifier Length ID_SELECT_NODE 1 (CRIS:0h) ID_PROG_START 5 (CRIS:1h) ID_PROG_DATA n (CRIS:2h) ID_DISPLAY_DATA 5 (CRIS:3h) 2 ID_WRITE_COMMAND 3 (CRIS:4h T89C51CC02 CAN Bootloader 28 Data[0] Data[1] Data[2] num node - - ...

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Table 1. Summary of Frames from Host (Continued) Identifier Length 2 ID_READ_COMMAND (CRIS:5h 4208D–CAN–03/08 T89C51CC02 CAN Bootloader Data[0] Data[1] Data[2] 00h - 00h 01h - 02h - 00h - 01h - 02h - 03h - 04h - 05h ...

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Table 2. Summary of Frames from Target (Bootloader) Identifier Length ID_SELECT_NODE 2 (CRIS:0h) ID_PROG_START 0 (CIRS:1h) ID_PROG_DATA 1 (CRIS:2h) n ID_DISPLAY_DATA 0 (CRIS:3h) 2 ID_WRITE_COMMAND 1 (CIRS:4h) ID_READ_COMMAND 1 (CRIS:5h) ID_ERROR 1 (CRIS:6h) T89C51CC02 CAN Bootloader 30 Data[0] Data[1] Data[2] ...

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Appendix-B Table 3. API Summary Function Name __api_rd_code_byte __api_wr_code_byte __api_wr_code_page __api_erase_block0 __api_erase_block1 __api_rd_HSB __api_clr_X2 __api_set_X2 __api_rd_BSB __api_wr_BSB __api_rd_SBV __api_wr_SBV __api_erase_SBV __api_rd_SSB __api_wr_SSB __api_rd_EB __api_wr_EB __api_rd_CANBTC1 __api_wr_CANBTC1 __api_rd_CANBTC2 __api_wr_CANBTC2 __api_rd_CANBTC3 __api_wr_CANBTC3 __api_rd_NNB __api_wr_NNB __api_rd_CRIS __api_wr_CRIS __api_rd_manufacturer __api_rd_device_id1 __api_rd_device_id2 __api_rd_device_id3 __api_rd_bootloader_version 4208D–CAN–03/08 ...

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Table 3. API Summary (Continued) Function Name __api_eeprom_busy __api_rd_eeprom_byte __api_wr_eeprom_byte __api_start_bootloader __api_start_isp Datasheet Change Log Changes from 1. Clarified explanation regarding full chip erase. See “Erasing Flash” on page 26. 4208B - 04/03 to 42108C - 12/03 Changes from 1. ...

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