Datasheet
259
ATmega48/88/168 Automotive [DATASHEET]
7530K–AVR–07/14
25.8.4 SPI Serial Programming Characteristics
For characteristics of the SPI module see Section 27.1 “SPI Timing Characteristics” on page 268.
Read extended fuse bits 0101 0000 0000 1000 xxxx xxxx oooo oooo
Read extended fuse bits. “0” =
programmed, “1” = unprogrammed.
See Table 25-4 on page 243 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 (Continued)
Instruction
Instruction Format
OperationByte 1 Byte 2 Byte 3 Byte4
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
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