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ATmega128 Datasheet(PDF) 304 Page - ATMEL Corporation |
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ATmega128 Datasheet(HTML) 304 Page - ATMEL Corporation |
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304 / 386 page  304 2467S–AVR–07/09 ATmega128 Note: 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 Table 129. SPI 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 SPI Serial Programming after RESET goes low. Chip Erase 1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase EEPROM and Flash. Read Program Memory 0010 H000 aaaa aaaa bbbb bbbb oooo oooo Read H (high or low) data o from Program memory at word address a:b. Load Program Memory Page 0100 H000 xxxx xxxx xbbb bbbb iiii iiii Write H (high or low) data i to Program Memory page at word address b. Data low byte must be loaded before data high byte is applied within the same address. Write Program Memory Page 0100 1100 aaaa aaaa bxxx xxxx xxxx xxxx Write Program Memory Page at address a:b. Read EEPROM Memory 1010 0000 xxxx aaaa bbbb bbbb oooo oooo Read data o from EEPROM memory at address a:b. Write EEPROM Memory 1100 0000 xxxx aaaa bbbb bbbb iiii iiii Write data i to EEPROM memory at address a:b. Read Lock bits 0101 1000 0000 0000 xxxx xxxx xxoo oooo Read Lock bits. “0” = programmed, “1” = unprogrammed. See Table 115 on page 286 for details. Write Lock bits 1010 1100 111x xxxx xxxx xxxx 11ii iiii Write Lock bits. Set bits = “0” to program Lock bits. See Table 115 on page 286 for details. Read Signature Byte 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read Signature Byte o at address b. Write Fuse bits 1010 1100 1010 0000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to unprogram. See Table 119 on page 288 for details. Write Fuse High Bits 1010 1100 1010 1000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to unprogram. See Table 118 on page 288 for details. Write Extended Fuse bits 1010 1100 1010 0100 xxxx xxxx xxxx xxii Set bits = “0” to program, “1” to unprogram. See Table 119 on page 288 for details. Read Fuse bits 0101 0000 0000 0000 xxxx xxxx oooo oooo Read Fuse bits. “0” = programmed, “1” = unprogrammed. See Table 119 on page 288 for details. Read Extendend Fuse bits 0101 0000 0000 1000 xxxx xxxx oooo oooo Read Extended Fuse bits. “0” = pro-grammed, “1” = unprogrammed. See Table 119 on page 288 for details. Read Fuse High Bits 0101 1000 0000 1000 xxxx xxxx oooo oooo Read Fuse high bits. “0” = pro-grammed, “1” = unprogrammed. See Table 118 on page 288 for details. Read Calibration Byte 0011 1000 xxxx xxxx 0000 00bb oooo oooo Read Calibration Byte o at address b. |
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