AT90LS2343-1PI Atmel, AT90LS2343-1PI Datasheet - Page 9
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AT90LS2343-1PI
Manufacturer Part Number
AT90LS2343-1PI
Description
IC MCU 2K FLASH 1MHZ IND 8-DIP
Manufacturer
Atmel
Series
AVR® 90LSr
Specifications of AT90LS2343-1PI
Core Processor
AVR
Core Size
8-Bit
Speed
1MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
5
Program Memory Size
2KB (1K x 16)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
General-purpose
Register File
1004D–09/01
Figure 7 shows the structure of the 32 general-purpose registers in the CPU.
Figure 7. AVR CPU General-purpose Working Registers
All the register operating instructions in the instruction set have direct and single-cycle
access to all registers. The only exception is the five constant arithmetic and logic
instructions SBCI, SUBI, CPI, ANDI and ORI between a constant and a register and the
LDI instruction for load immediate constant data. These instructions apply to the second
half of the registers in the register file (R16..R31). The general SBC, SUB, CP, AND and
OR and all other operations between two registers or on a single register apply to the
entire register file.
As shown in Figure 7, each register is also assigned a data memory address, mapping
them directly into the first 32 locations of the user Data Space. Although the register file
is not physically implemented as SRAM locations, this memory organization provides
great flexibility in access of the registers, as the X-, Y-, and Z-registers can be set to
index any register in the file.
Registers
Purpose
General
Working
7
R13
R14
R15
R16
R17
R26
R27
R28
R29
R30
R31
R0
R1
R2
…
…
0
AT90S/LS2323/2343
Addr.
$0D
$0E
$1A
$1B
$1C
$1D
$1E
$00
$01
$02
$0F
$10
$11
$1F
X-register high byte
Y-register high byte
Z-register high byte
X-register low byte
Y-register low byte
Z-register low byte
9