参数资料
型号: ATMEGA325V-8AUR
厂商: Atmel
文件页数: 5/85页
文件大小: 0K
描述: MCU AVR 32K FLASH 8MHZ 64TQFP
产品培训模块: megaAVR Introduction
标准包装: 1,000
系列: AVR® ATmega
核心处理器: AVR
芯体尺寸: 8-位
速度: 8MHz
连通性: SPI,UART/USART,USI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 54
程序存储器容量: 32KB(16K x 16)
程序存储器类型: 闪存
EEPROM 大小: 1K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-TQFP
包装: 带卷 (TR)
其它名称: ATMEGA325V-8AUR-ND
13
2570N–AVR–05/11
ATmega325/3250/645/6450
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.
7.5
General Purpose Register File
The Register File is optimized for the AVR Enhanced RISC instruction set. In order to achieve
the required performance and flexibility, the following input/output schemes are supported by the
Register File:
One 8-bit output operand and one 8-bit result input
Two 8-bit output operands and one 8-bit result input
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 on page 13 shows the structure of the 32 general purpose working registers in the
CPU.
Figure 7-2.
AVR CPU General Purpose Working Registers
Most of the instructions operating on the Register File have direct access to all registers, and
most of them are single cycle instructions.
As shown in Figure 7-2 on page 13, 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.
7.5.1
The X-register, Y-register, and Z-register
The registers R26..R31 have some added functions to their general purpose usage. These reg-
isters 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 on page 14.
7
0
Addr.
R0
0x00
R1
0x01
R2
0x02
R13
0x0D
General
R14
0x0E
Purpose
R15
0x0F
Working
R16
0x10
Registers
R17
0x11
R26
0x1A
X-register Low Byte
R27
0x1B
X-register High Byte
R28
0x1C
Y-register Low Byte
R29
0x1D
Y-register High Byte
R30
0x1E
Z-register Low Byte
R31
0x1F
Z-register High Byte
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