5.1 BYTE

Reserves bytes for a variable.

The BYTE directive reserves memory resources in the SRAM or EEPROM. In order to be able to refer to the reserved location, the BYTE directive should be preceded by a label. The directive takes one parameter, which is the number of bytes to reserve. The directive can not be used within a Code segment (see directives ESEG, CSEG, and DSEG). Note that a parameter must be given. The allocated bytes are not initialized.

LABEL: .BYTE expression

.DSEG 
var1:  .BYTE 1 ; reserve 1 byte to var1 
table: .BYTE tab_size ; reserve tab_size bytes

.CSEG 
ldi r30,low(var1) ; Load Z register low 
ldi r31,high(var1) ; Load Z register high 
ld r1,Z ; Load VAR1 into register 1