Rainbow Electronics ATmega161L - Manual (Page 14)

14
ATmega161(L)
1228C–AVR–08/02
Operands are contained in registers r (Rr) and d (Rd). The result is stored in register d
(Rd).
I/O Direct Figure 11. I/O Direct Addressing
Operand address is contained in six bits of the instruction word. n is the destination or
Source Register Address.
Data Direct Figure 12. Direct Data Addressing
A 16-bit data address is contained in the 16 LSBs of a two-word instruction. Rd/Rr spec-
ify the destination or source register.
0
63
0 5
n OP
15
P
I/O MEMORY
OP Rr/Rd
16 31
15 0
16 LSBs
$0000
$FFFF
20 19
Data Space