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ATmega88 Datasheet(PDF) 297 Page - ATMEL Corporation |
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ATmega88 Datasheet(HTML) 297 Page - ATMEL Corporation |
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297 / 340 page  297 7530H–AVR–02/09 ATmega48/88/168 Automotive 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 25.8.4 SPI Serial Programming Characteristics For characteristics of the SPI module see “SPI Timing Characteristics” on page 305. 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. See Table XXX on page XXX for details. Write Fuse High bits 1010 1100 1010 1000 xxxx xxxx iiii iiii Set bits = “0” to program, “1” to unprogram. See Table 21-1 on page 242 for details. Write Extended Fuse Bits 1010 1100 1010 0100 xxxx xxxx xxxx xxii Set bits = “0” to program, “1” to unprogram. See Table 25-4 on page 280 for details. Read Fuse bits 0101 0000 0000 0000 xxxx xxxx oooo oooo Read Fuse bits. “0” = programmed, “1” = unprogrammed. See Table XXX on page XXX 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 21-1 on page 242 for details. Read Extended Fuse Bits 0101 0000 0000 1000 xxxx xxxx oooo oooo Read Extended Fuse bits. “0” = pro-grammed, “1” = unprogrammed. See Table 25-4 on page 280 for details. Read Calibration Byte 0011 1000 000x xxxx 0000 0000 oooo oooo Read Calibration Byte Poll RDY/BSY 1111 0000 0000 0000 xxxx xxxx xxxx xxxo If o = “1”, a programming operation is still busy. Wait until this bit returns to “0” before applying another command. Table 25-17. Serial Programming Instruction Set Instruction Instruction Format Operation Byte 1 Byte 2 Byte 3 Byte4 |
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