ATA6613-EK Atmel, ATA6613-EK Datasheet - Page 35
ATA6613-EK
Manufacturer Part Number
ATA6613-EK
Description
BOARD DEMO LIN-MCM FOR ATA6613
Manufacturer
Atmel
Specifications of ATA6613-EK
Main Purpose
Interface, LIN + MCU
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
ATA6613
Primary Attributes
LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator, Window Watchdog
Secondary Attributes
16 kB Flash, 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 48-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 35 of 364
- Download datasheet (7Mb)
6.4.3
6.4.4
9111H–AUTO–01/11
ALU – Arithmetic Logic Unit
Status Register
The high-performance AVR
pose working registers. Within a single clock cycle, arithmetic operations between general
purpose registers or between a register and an immediate are executed. The ALU operations
are divided into three main categories – arithmetic, logical, and bit-functions. Some implemen-
tations of the architecture also provide a powerful multiplier supporting both signed/unsigned
multiplication and fractional format. See the “Instruction Set” section for a detailed description.
The Status Register contains information about the result of the most recently executed arith-
metic instruction. This information can be used for altering program flow in order to perform
conditional operations. Note that the Status Register is updated after all ALU operations, as
specified in the Instruction Set Reference. This will in many cases remove the need for using
the dedicated compare instructions, resulting in faster and more compact code.
The Status Register is not automatically stored when entering an interrupt routine and
restored when returning from an interrupt. This must be handled by software.
The AVR Status Register – SREG – is defined as:
Bit
Read/Write
Initial Value
• Bit 7 – I: Global Interrupt Enable
• Bit 6 – T: Bit Copy Storage
• Bit 5 – H: Half Carry Flag
• Bit 4 – S: Sign Bit, S = N
The Global Interrupt Enable bit must be set for the interrupts to be enabled. The individual
interrupt enable control is then performed in separate control registers. If the Global Inter-
rupt Enable Register is cleared, none of the interrupts are enabled independent of the
individual interrupt enable settings. The I-bit is cleared by hardware after an interrupt has
occurred, and is set by the RETI instruction to enable subsequent interrupts. The I-bit can
also be set and cleared by the application with the SEI and CLI instructions, as described
in the instruction set reference.
The Bit Copy instructions BLD (Bit LoaD) and BST (Bit STore) use the T-bit as source or
destination for the operated bit. A bit from a register in the Register File can be copied into
T by the BST instruction, and a bit in T can be copied into a bit in a register in the Register
File by the BLD instruction.
The Half Carry Flag H indicates a Half Carry in some arithmetic operations. Half Carry Is
useful in BCD arithmetic. See the “Instruction Set Description” for detailed information.
The S-bit is always an exclusive or between the Negative Flag N and the Two’s Comple-
ment Overflow Flag V. See the “Instruction Set Description” for detailed information.
R/W
7
0
I
R/W
6
T
0
®
ALU operates in direct connection with all the 32 general pur-
V
R/W
H
5
0
R/W
S
4
0
Atmel ATA6612/ATA6613
R/W
V
3
0
R/W
N
2
0
R/W
1
Z
0
R/W
C
0
0
SREG
35
Related parts for ATA6613-EK
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Ata6613
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: