Rainbow Electronics ATmega8HVD - Manual (Page 134)

134
8052B–AVR–09/08
ATmega4HVD/8HVD
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 correspondig section for Fuse and Lock bits, Calibration and Signature bytes and Page size.
6. Instructions accessing program memory use word address. This address may be random within the page range.
7. See htt://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 24-2 on page
135 .
Read Extended Fuse Bits $50 $08 $00 data byte out
Read Calibration Byte $38 $00 $00 data byte out
Write Instructions (6)
Write Program Memory Page $4C adr MSB adr LSB $00
Write EEPROM Memory $C0 adr MSB adr LSB data byte in
Write EEPROM Memory Page (page access) $C2 adr MSB adr LSB $00
Write Lock bits $AC $E0 $00 data byte in
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 24-10. Serial Programming Instruction Set (Continued)
Instruction/Operation
Instruction Format
Byte 1 Byte 2 Byte 3 Byte4