AT90LS2343-1SI Atmel, AT90LS2343-1SI Datasheet - Page 3
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AT90LS2343-1SI
Manufacturer Part Number
AT90LS2343-1SI
Description
IC MCU 2K FLASH 1MHZ IND 8-SOIC
Manufacturer
Atmel
Series
AVR® 90LSr
Specifications of AT90LS2343-1SI
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-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
-
1004D–09/01
Figure 2. The AT90S/LS2323 Block Diagram
The AT90S2323/2343 provides the following features: 2K bytes of In-System Program-
mabl e Flash, 128 bytes EEPROM, 128 bytes SRAM, 3 (A T90S/LS2323)/5
(AT90S/LS2343) general-purpose I/O lines, 32 general-purpose working registers, an 8-
bit timer/counter, internal and external interrupts, programmable Watchdog Timer with
internal oscillator, an SPI serial port for Flash Memory downloading and two software-
selectable power-saving modes. The Idle mode stops the CPU while allowing the
SRAM, timer/counters, SPI port and interrupt system to continue functioning. The
Power-down mode saves the register contents but freezes the oscillator, disabling all
other chip functions until the next interrupt or hardware reset.
The device is manufactured using Atmel’s high-density nonvolatile memory technology.
The On-chip Flash allows the program memory to be reprogrammed in-system through
an SPI serial interface. By combining an 8-bit RISC CPU with ISP Flash on a monolithic
GND
VCC
PROGRAMMING
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
REGISTER
COUNTER
CONTROL
DECODER
FLASH
LOGIC
LINES
REGISTERS
REGISTER
PURPOSE
GENERAL
POINTER
STATUS
STACK
SRAM
DATA REGISTER
ALU
SPI
X
Y
Z
PORTB
8-BIT DATA BUS
PORTB DRIVERS
PB0 - PB2
REG. PORTB
DATA DIR.
AT90S/LS2323/2343
MCU CONTROL
OSCILLATOR
WATCHDOG
INTERRUPT
REGISTER
INTERNAL
COUNTER
EEPROM
TIMER/
TIMER
UNIT
OSCILLATOR
TIMING AND
CONTROL
RESET
3