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ATmega32U2 Datasheet(PDF) 262 Page - ATMEL Corporation |
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ATmega32U2 Datasheet(HTML) 262 Page - ATMEL Corporation |
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262 / 314 page  262 7799B–AVR–07/09 ATmega8U2/16U2/32U2 Table 25-16. 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 after RESET goes low. Chip Erase 1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip Erase EEPROM and Flash. Load Extended Address Byte 0100 1101 0000 0000 cccc cccc xxxx xxxx Defines Extended Address Byte for Read Program Memory and Write Program Memory Page. Read Program Memory 0010 H000 aaaa aaaa bbbb bbbb oooo oooo Read H (high or low) data o from Program memory at word address c:a:b. Load Program Memory Page 0100 H000 xxxx xxxx xxbb 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 bbxx xxxx xxxx xxxx Write Program Memory Page at address c:a:b. Read EEPROM Memory 1010 0000 0000 aaaa bbbb bbbb oooo oooo Read data o from EEPROM memory at address a:b. Write EEPROM Memory 1100 0000 0000 aaaa bbbb bbbb iiii iiii Write data i to EEPROM memory at address a:b. Load EEPROM Memory Page (page access) 1100 0001 0000 0000 0000 00bb iiii iiii Load data i to EEPROM memory page buffer. After data is loaded, program EEPROM page. Write EEPROM Memory Page (page access) 1100 0010 0000 aaaa bbbb bb00 xxxx xxxx Write EEPROM page at address a:b. Read Lock bits 0101 1000 0000 0000 xxxx xxxx xxoo oooo Read Lock bits. “0” = programmed, “1” = unprogrammed. See Table 25-1 on page 246 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 25-1 on page 246 for details. Read Signature Byte 0011 0000 000x 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. Write Fuse High bits 1010 1100 1010 1000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to unprogram. Write Extended Fuse Bits 1010 1100 1010 0100 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to unprogram. See Table 25-3 on page 247 for details. Read Fuse bits 0101 0000 0000 0000 xxxx xxxx oooo oooo Read Fuse bits. “0” = programmed, “1” = unprogrammed. Read Fuse High bits 0101 1000 0000 1000 xxxx xxxx oooo oooo Read Fuse High bits. “0” = pro- grammed, “1” = unprogrammed. |
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