Datasheet

Variable Corresponding
Variable
(1)
Description
PCPAGE PC[14:7] Z15:Z8 Program counter page address: Page select, for page
erase and page write
PCWORD PC[6:0] Z7:Z1 Program counter word address: Word select, for filling
temporary buffer (must be zero during page write
operation)
Note:
1. Z0: should be zero for all SPM commands, byte select for the LPM instruction.
See Addressing the Flash During Self-Programming for details about the use of Z-pointer during
Self- Programming.
27.9. Register Description
Atmel ATmega644A [DATASHEET]
Atmel-42716C-ATmega644A_Datasheet_Complete-10/2016
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