atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 14

• Manufacturer Part Number: atmega161-4pi
• Description: 8-bit Microcontroller With 16k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

I/O Direct
Data Direct
14
ATmega161(L)
Operands are contained in registers r (Rr) and d (Rd). The result is stored in register d
(Rd).
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.
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.
31
15
15
OP
OP
16 LSBs
n
20 19
5
Rr/Rd
P
16
0
0
Data Space
I/O MEMORY
$0000
$FFFF
0
63
1228D–AVR–02/07