Home >> ATMEGA1281V Search >> ATMEL ATMEGA1281V Datasheet

(Datasheet) ATMEGA1281V

8-bit Atmel Microcontroller

No Preview Available !

ATMEGA1281V pdf
7.6.1 RAMPZ – Extended Z-pointer Register for ELPM/SPM
Bit
0x3B (0x5B)
Read/Write
Initial Value
7
RAMPZ7
R/W
0
6
RAMPZ6
R/W
0
5
RAMPZ5
R/W
0
4
RAMPZ4
R/W
0
3
RAMPZ3
R/W
0
2
RAMPZ2
R/W
0
1
RAMPZ1
R/W
0
0
RAMPZ0
R/W
0
RAMPZ
For ELPM/SPM instructions, the Z-pointer is a concatenation of RAMPZ, ZH, and ZL, as shown in Figure 7-4. Note
that LPM is not affected by the RAMPZ setting.
Figure 7-4. The Z-pointer used by ELPM and SPM
Bit
(Individually)
7
0
RAMPZ
Bit (Z-pointer)
23
16
7
ZH
15
0
8
70
ZL
70
7.6.2
The actual number of bits is implementation dependent. Unused bits in an implementation will always read as zero.
For compatibility with future devices, be sure to write these bits to zero.
EIND – Extended Indirect Register
Bit
0x3C (0x5C)
Read/Write
Initial Value
7
EIND7
R/W
0
6
EIND6
R/W
0
5
EIND5
R/W
0
4
EIND4
R/W
0
3
EIND3
R/W
0
2
EIND2
R/W
0
1
EIND1
R/W
0
0
EIND0
R/W
0
EIND
For EICALL/EIJMP instructions, the Indirect-pointer to the subroutine/routine is a concatenation of EIND, ZH, and
ZL, as shown in Figure 7-5. Note that ICALL and IJMP are not affected by the EIND setting.
Figure 7-5. The Indirect-pointer used by EICALL and EIJMP
Bit
(Individually)
Bit (Indirect-
pointer)
7
EIND
23
0
16
7
ZH
15
0
8
7
ZL
7
0
0
The actual number of bits is implementation dependent. Unused bits in an implementation will always read as zero.
For compatibility with future devices, be sure to write these bits to zero.
7.7 Instruction Execution Timing
This section describes the general access timing concepts for instruction execution. The AVR CPU is driven by the
CPU clock clkCPU, directly generated from the selected clock source for the chip. No internal clock division is used.
Figure 7-6 on page 17 shows the parallel instruction fetches and instruction executions enabled by the Harvard
architecture and the fast-access Register File concept. This is the basic pipelining concept to obtain up to 1 MIPS
per MHz with the corresponding unique results for functions per cost, functions per clocks, and functions per
power-unit.
ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
2549Q–AVR–02/2014
16
ATMEL
ATMEL


PDF Download ATMEGA1281V PDF File

PDF View ATMEGA1281V for Mobile




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