Atmel ATmega328P Xplained Mini MEGA328P-XMINI MEGA328P-XMINI Data Sheet

278

ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]

Atmel-8271H-AVR- ATmega-Datasheet_08/2014

In 

 through 

, the parameters used in the description of the self programming are given. 

Note:

The different BOOTSZ Fuse configurations are shown in 

For details about these two section, see 

Note:

1. Z15: always ignored

Z0: should be zero for all SPM commands, byte select for the LPM instruction.
See 

 for details about the use of Z-pointer during Self-

Programming.

1

1

256 words

4

0x0000 - 0x3EFF

0x3F00 - 0x3FFF

0x3EFF

0x3F00 

1

0

512 words

8

0x0000 - 0x3DFF

0x3E00 - 0x3FFF

0x3DFF

0x3E00

0

1

1024 words

16

0x0000 - 0x3BFF

0x3C00 - 0x3FFF

0x3BFF

0x3C00

0

0

2048 words

32

0x0000 - 0x37FF

0x3800 - 0x3FFF

0x37FF

0x3800

Read-While-Write section (RWW)

224

0x0000 - 0x37FF

No Read-While-Write section (NRWW)

32

0x3800 - 0x3FFF

PCMSB

13

Most significant bit in the Program Counter. (The Program Counter 
is 14 bits PC[13:0])

PAGEMSB

5

Most significant bit which is used to address the words within 
one page (64 words in a page requires 6 bits PC [5:0])

ZPCMSB

Z14

Bit in Z-register that is mapped to PCMSB. Because Z0 is not used, 
the ZPCMSB equals PCMSB + 1.

ZPAGEMSB

Z6

Bit in Z-register that is mapped to PAGEMSB. Because Z0 is not 
used, the ZPAGEMSB equals PAGEMSB + 1.

PCPAGE

PC[13:6]

Z14:Z7

Program counter page address: Page select, for page erase and 
page write

PCWORD

PC[5:0]

Z6:Z1

Program counter word address: Word select, for filling temporary 
buffer (must be zero during page write operation)