atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 14
atmega161-4pi
Manufacturer Part Number
atmega161-4pi
Description
8-bit Microcontroller With 16k Bytes Of In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA161-4PI.pdf
(159 pages)
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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
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