參數(shù)資料
型號： AT43USB355E-AU
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
中文描述： 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64
封裝： 1.40 MM, GREEN, PLASTIC, MS-026ACB, LQFP-64
文件頁數(shù)： 37/115頁
文件大?。?/td> 610K
代理商： AT43USB355E-AU
37
AT43USB355
2603G–USB–04/06
AVR Register Set
Status Register and Stack Pointer
Status Register – SREG
Bit 7
–
I: Global Interrupt Enable
The global interrupt enable bit must be set (one) for the interrupts to be enabled. The individ-
ual interrupt enable control is then performed in separate control registers. If the global
interrupt enable bit is cleared (zero), none of the interrupts are enabled independent of the
individual interrupt enable settings. The I-bit is cleared by the hardware after an interrupt has
occurred, and is set by the RETI instruction to enable subsequent interrupts.
Bit 6
–
T: Bit Copy Storage
The bit copy instructions BLD (Bit LoaD) and BST (Bit STore) use the T bit as source and des-
tination 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.
Bit 5
–
H: Half Carry Flag
The half carry flag H indicates a half carry in some arithmetic operations. See the Instruction
Set Description for detailed information.
Bit 4
–
S: Sign Bit, S = N
⊕
V
The S-bit is always an exclusive or between the negative flag N and the two's complement
overflow flag V. See the Instruction Set Description for detailed information.
Bit 3
–
V: Two's Complement Overflow Flag
The two's complement overflow flag V supports two's complement arithmetics. See the
Instruction Set Description for detailed information.
Bit 2
–
N: Negative Flag
The negative flag N indicates a negative result after the different arithmetic and logic opera-
tions. See the Instruction Set Description for detailed information.
Bit 1
–
Z: Zero Flag
The zero flag Z indicates a zero result after the different arithmetic and logic operations. See
the Instruction Set Description for detailed information.
Bit 0
–
C: Carry Flag
The carry flag C indicates a carry in an arithmetic or logic operation. See the Instruction Set
Description for detailed information.
Note that the status register is not automatically stored when entering an interrupt routine and
restored when returning from an interrupt routine. This must be handled by software.
Bit
7
6
5
4
3
2
1
0
$3F ($5F)
I
T
H
S
V
N
Z
C
SREG
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
相關PDF資料
PDF描述
AT43USB355M-AC Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
AT43USB355M-AU Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
AT43USB380 On-The-Go Upgrade of the AT43USB370 USB 2.0 Full-Speed Host/Function Processor
AT45BR3214B 32-MEGABIT DATAFLASH + 4-MEGABIT SRAM STACK MEMORY
AT45BR3214B-C1 32-MEGABIT DATAFLASH + 4-MEGABIT SRAM STACK MEMORY
相關代理商/技術參數(shù)
參數(shù)描述
AT43USB355M-AC 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
AT43USB355M-AU 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Full-speed USB Microcontroller with Embedded Hub, ADC and PWM
AT43USB370 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB 2.0 Full-Speed Host/Function Processor
AT43USB370E-AC 功能描述:USB 接口集成電路 USB HOST DEVICE CONTROL - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
AT43USB380 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:On-The-Go Upgrade of the AT43USB370 USB 2.0 Full-Speed Host/Function Processor
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