参数资料
型号: ATTINY2313A-SUR
厂商: Atmel
文件页数: 79/172页
文件大小: 0K
描述: MCU AVR 2KB FLASH 20MHZ 20SOIC
产品培训模块: tinyAVR Introduction
标准包装: 1,000
系列: AVR® ATtiny
核心处理器: AVR
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 18
程序存储器容量: 2KB(1K x 16)
程序存储器类型: 闪存
EEPROM 大小: 128 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
其它名称: ATTINY2313A-SUR-ND
17
8246B–AVR–09/11
ATtiny2313A/4313
5.2
Data Memory (SRAM) and Register Files
Table 5-2 shows how the data memory and register files of ATtiny2313A/4313 are organized.
These memory areas are volatile, i.e. they do not retain information when power is removed.
Note:
1. Also known as data address. This mode of addressing covers the entire data memory and reg-
ister area. The address is contained in a 16-bit area of two-word instructions.
2. Also known as direct I/O address. This mode of addressing covers part of the register area,
only. It is used by instructions where the address is embedded in the instruction word.
The 224/352 memory locations include the general purpose register file, I/O register file,
extended I/O register file, and the internal data memory.
For compatibility with future devices, reserved bits should be written to zero, if accessed.
Reserved I/O memory addresses should never be written.
5.2.1
General Purpose Register File
The first 32 locations are reserved for the general purpose register file. These registers are
5.2.2
I/O Register File
Following the general purpose register file, the next 64 locations are reserved for I/O registers.
Registers in this area are used mainly for communicating with I/O and peripheral units of the
device. Data can be transferred between I/O space and the general purpose register file using
instructions such as IN, OUT, LD, ST, and derivatives.
All I/O registers in this area can be accessed with the instructions IN and OUT. These I/O spe-
cific instructions address the first location in the I/O register area as 0x00 and the last as 0x3F.
The low 32 registers (address range 0x00...0x1F) are accessible by some bit-specific instruc-
tions. In these registers, bits are easily set and cleared using SBI and CBI, while bit-conditional
branches are readily constructed using instructions SBIC, SBIS, SBRC, and SBRS.
Registers in this area may also be accessed with instructions LD/LDD/LDI/LDS and
ST/STD/STS. These instructions treat the entire volatile memory as one data space and, there-
fore, address I/O registers starting at 0x20.
ATtiny2313A/4313 also contains three general purpose I/O registers that can be used for storing
any information. See GPIOR0, GPIOR1 and GPIOR2 in “Register Summary” on page 255.
These general purpose I/O registers are particularly useful for storing global variables and status
Table 5-2.
Layout of Data Memory and Register Area.
Device
Memory Area
Size
Long Address (1)
Short Address (2)
ATtiny2313A
General purpose register file
32B
0x000 – 0x01F
n/a
I/O register file
64B
0x020 – 0x05F
0x00 – 0x3F
Data SRAM
128B
0x060 – 0x0E0
n/a
ATtiny4313
General purpose register file
32B
0x000 – 0x01F
n/a
I/O register file
64B
0x020 – 0x05F
0x00 – 0x3F
Data SRAM
256B
0x060 – 0x160
n/a
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