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T89C51RD2-3CWC-L 数据表(PDF) 60 Page - ATMEL Corporation |
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T89C51RD2-3CWC-L 数据表(HTML) 60 Page - ATMEL Corporation |
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60 / 86 page  Rev. F - 15 February, 2001 60 T89C51RD2 03 Miscellaneous Write Functions :nnxxxx03ffssddcc Where: nn = number of bytes (hex) in record xxxx = required field, but value is a “don’t care” 03 = Write Function ff = subfunction code ss = selection code dd = data input (as needed) cc = checksum Subfunction Code = 04 (Reset Boot Vector and Status Byte) ff = 04 ss = don’t care dd = don’t care Example: :020000030400F8 Reset boot vector (FCh) and status byte (FFh) Subfunction Code = 05 (Program Software Security Bits) ff = 05 ss = 00 program software security bit 1 (Level 2 inhibit writing to FLASH) ss = 01 program software security bit 2 (Level 3 inhibit FLASH verify) ss = 02 program security bit 3 (No effect, left for Philips compatibity; disable external memory is already set in the default hardware security byte) Example: :020000030501F6 program security bit 2 Subfunction Code = 06 (Program Status Byte or Boot Vector) ff = 06 ss = 00 program BSB ss = 01 program boot vector Example: :03000003060100F5 program boot vector with 00 Subfunction Code = 07 (Full chip erase) ff = 07 Example: :0100000307F5 full chip erase (include boot vector / status byte and software security bit erase) 04 Display Device Data or Blank Check Record type 04 causes the contents of the entire FLASH array to be sent out the serial port in a formatted display. This display consists of an address and the contents of 16 bytes starting with that address. No display of the device contents will occur if security bit 2 has been programmed. The dumping of the device data to the serial port is terminated by the reception of any character. General Format of Function 04 :05xxxx04sssseeeeffcc Where: 05 = number of bytes (hex) in record xxxx = required field, but value is a “don’t care” 04 = “Display Device Data or Blank Check” function code ssss = starting address eeee = ending address ff = subfunction 00 = display data 01 = blank check cc = checksum Example: :0500000440004FFF0069 (display 4000–4FFF) Table 32. Intel-Hex Records Used by In-System Programming |
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