Home >> ATMEGA1281V Search >> ATMEL ATMEGA1281V Datasheet
ATMEGA1281V Datasheet
8-bit Atmel Microcontroller
ATMEL
ATMEL


No Preview Available !

ATMEGA1281V pdf
• Two 8-bit output operands and one 16-bit result input
• One 16-bit output operand and one 16-bit result input
Figure 7-2 shows the structure of the 32 general purpose working registers in the CPU.
Figure 7-2. AVR CPU General Purpose Working Registers
General
Purpose
Working
Registers
70
R0
R1
R2
R13
R14
R15
R16
R17
R26
R27
R28
R29
R30
R31
Addr.
0x00
0x01
0x02
0x0D
0x0E
0x0F
0x10
0x11
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
X-register Low Byte
X-register High Byte
Y-register Low Byte
Y-register High Byte
Z-register Low Byte
Z-register High Byte
7.5.1
Most of the instructions operating on the Register File have direct access to all registers, and most of them are sin-
gle cycle instructions.
As shown in Figure 7-2, each register is also assigned a data memory address, mapping them directly into the first
32 locations of the user Data Space. Although not being physically implemented as SRAM locations, this memory
organization provides great flexibility in access of the registers, as the X-, Y- and Z-pointer registers can be set to
index any register in the file.
The X-register, Y-register, and Z-register
The registers R26..R31 have some added functions to their general purpose usage. These registers are 16-bit
address pointers for indirect addressing of the data space. The three indirect address registers X, Y, and Z are
defined as described in Figure 7-3.
Figure 7-3. The X-, Y-, and Z-registers
X-register
15
7
R27 (0x1B)
XH
07
R26 (0x1A)
XL
0
0
Y-register
15
7
R29 (0x1D)
YH
07
R28 (0x1C)
YL
0
0
15 ZH
ZL 0
Z-register
7
0
7
0
R31 (0x1F)
R30 (0x1E)
In the different addressing modes these address registers have functions as fixed displacement, automatic incre-
ment, and automatic decrement (see the “Instruction Set Summary” on page 404 for details).
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
2549Q–AVR–02/2014
14

ATMEGA1281V Datasheet PDF


Related Start with ATMEGA1281*

[ ATMEGA1281 ATMEL Corporation ]     [ ATMEGA1281V ATMEL ]     [ ATMEGA128 ATMEL Corporation ]     [ ATMEGA1280 ATMEL Corporation ]     [ ATMEGA1280V ATMEL ]     [ ATMEGA1281 ATMEL Corporation ]     [ ATMEGA1281V ATMEL ]     [ ATMEGA1284 ATMEL Corporation ]     [ ATMEGA1284 ATMEL ]     [ ATMEGA1284P ATMEL Corporation ]     [ ATMEGA1284P ATMEL ]     [ ATMEGA1284RFR2 ATMEL ]    


Searches related to ATMEGA1281V part

Find Chips CBC RS online RUTRONIK 24
Component Distributors NexGen Digital Richardson RFPD ICC
Beyond Components NAC PEI-Genesis Powell Electronics
TME Ameya 360 Power & Signal Datasheets360
Freelance Electronics Sager Electronics Terminals & Connectors TTI

0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
@ 2014 :: DatasheetsPDF.com :: Semiconductors Datasheet Search & Download Site