187
9151AINDCO07/09
ATA8742
Notes: 1. Not all instructions are applicable for all parts.
2. a = address
3. Bits are programmed 0, unprogrammed 1.
4. To ensure future compatibility, unused Fuses and Lock bits should be unprogrammed (1) .
5. Refer to the corresponding section for Fuse and Lock bits, Calibration and Signature bytes and Page size.
6. Instructions accessing program memory use a word address. This address may be random within the page range.
7. See http://www.atmel.com/avr for Application Notes regarding programming and programmers.
If the LSB in RDY/BSY data byte out is 1, a programming operation is still pending. Wait until
this bit returns 0 before the next instruction is carried out.
Within the same page, the low data byte must be loaded prior to the high data byte.
After data is loaded to the page buffer, program the EEPROM page, see Figure 28-2 on page
187.
Figure 28-2. Serial Programming Instruction example
Write Fuse bits
$AC
$A0
$00
data byte in
Write Fuse High bits
$AC
$A8
$00
data byte in
Write Extended Fuse Bits
$AC
$A4
$00
data byte in
Table 28-11. Serial Programming Instruction Set (Continued)
Instruction/Operation
(1)
Instruction Format
Byte 1
Byte 2
Byte 3
Byte4
Byte 1
Byte 2
Byte 3
Byte 4
Adr LSB
Bit 15 B
0
Serial Programming Instruction
Program Memory/
EEPR M M m r
Page 0
Page 1
Page 2
Page N-1
Page Buffer
Write Program Memory Page/
Write EEPROM Memory Page
Load Program Memory Page (High/Low Byte)/
Load EEPROM Memory Page (page access)
Byte 1
Byte 2
Byte 3
Byte 4
Bit 15 B
0
Adr MSB
Page Offset
Page Number
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