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AT90S8535 Datasheet(PDF) 102 Page - ATMEL Corporation |
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AT90S8535 Datasheet(HTML) 102 Page - ATMEL Corporation |
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102 / 127 page  102 AT90S/LS8535 1041H–11/01 f Notes: 1. a = address high bits b = address low bits H = 0 – Low byte, 1 – High Byte o = data out i = data in x = don’t care 1 = Lock Bit 1 2 = Lock Bit 2 F = FSTRT Fuse S = SPIEN Fuse 2. The signature bytes are not readable in lock mode 3, i.e., both Lock bits programmed. Table 42. Serial Programming Instruction Set Instruction Instruction Format Operation Byte 1 Byte 2 Byte 3 Byte4 Programming Enable 1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable serial programming while RESET is low. Chip Erase 1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase Flash and EEPROM memory arrays. Read Program Memory 0010 H000 xxxx aaaa bbbb bbbb oooo oooo Read H (high or low) data o from program memory at word address a:b. Write Program Memory 0100 H000 xxxx aaaa bbbb bbbb iiii iiii Write H (high or low) data i to program memory at word address a:b. Read EEPROM Memory 1010 0000 xxxx xxxa bbbb bbbb oooo oooo Read data o from EEPROM memory at address a:b. Write EEPROM Memory 1100 0000 xxxx xxxa bbbb bbbb iiii iiii Write data i to EEPROM memory at address a:b. Read Lock and Fuse Bits 0101 1000 xxxx xxxx xxxx xxxx 12S x xxxF Read Lock and Fuse bits. “0” = programmed “1” = unprogrammed Write Lock Bits 1010 1100 1111 1211 xxxx xxxx xxxx xxxx Write Lock bits. Set bits 1,2 = “0” to program Lock bits. Read Signature Byte 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read signature byte o at address b. (2) Write FSTRT Fuse 1010 1100 1011 111F xxxx xxxx xxxx xxxx Write FSTRT fuse. Set bit F = “0” to program, “1” to unprogram. |
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