Datasheet

Variable Corresponding

Z-value

(1)

Description

ZPAGEMSB Z6 Bit in Z-register that is mapped to PAGEMSB. Because Z0 is

not used, the ZPAGEMSB equals PAGEMSB + 1.

PCPAGE PC[12:6] Z13: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)

Note: 1. Z15:Z14: always ignored

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

Please refer to 31.7 Addressing the Flash During Self-Programming for details about the use of Z-pointer

during Self-Programming.

31.9 Register Description

ATmega48PA/88PA/168PA

Boot Loader Support – Read-While-Write Self-...

Datasheet Complete

DS40002011A-page 361