AT90LS2343-1SI Atmel, AT90LS2343-1SI Datasheet

AT90LS2343-1SI

Manufacturer Part Number

AT90LS2343-1SI

Description

IC MCU 2K FLASH 1MHZ IND 8-SOIC

Manufacturer

Atmel

Series

AVR® 90LSr

Datasheets

1.AT90LS2323-4PC.pdf (64 pages)

2.AT90LS2343-4PC.pdf (3 pages)

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

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

Current page: 1 of 3
Download datasheet (53Kb)

Errata

•

6. Releasing Reset Condition without Clock

5. Clearing Lock-bits at High V

4. Wrong Clearing of XTRF in MCUSR

3. Reset during EEPROM Write

2. Serial Programming at Voltages below 3.0 Volts

Releasing Reset Condition without Clock

Clearing Lock-bits at High V

Wrong Clearing of XTRF in MCUSR

Reset during EEPROM Write

Serial Programming at Voltages below 3.0 Volts

High I

If an external reset or a watchdog reset occurs while the clock is stopped and the

reset is released before the clock is restarted, the internal reset will time-out after

the start-up delay, which is independent of the external clock. If no external clock

pulses are present in the period when internal reset is active, the reset does cor-

rectly causes tri-stating of the I/O while the reset is held. However, if the internal

reset is relesed before the clock starts running, the part does not clears its I/O reg-

isters, nor set PC to 0x00. Here, stopping the clock refers to gating the external

clock input. Power-down mode does not have this issue.

Problem Fix/Workaround

Make sure the clock is running whenever an external reset can be expected. If the

Watchdog is used, never stop an external clock.

If the temperature is too high, and/or the programming voltage is too high, the

clearing of lock-bits might fail.

Problem Fix/Workaround

Keep V

The XTRF flag in MCUSR will be cleared when clearing the PORF flag. The flag

does not get cleared by writing a “0” to it.

Problem Fix/Workaround

Finish the test of both flags before clearing any of them. Clear both flags simulta-

neously by writing 0 to both PORF and XTRF in MCUCR.

If reset is activated during EEPROM write, the result is not what should be

expected. The EEPROM write cycle completes as normal, but the address regis-

ters are reset to 0. The result is that both the address written and address 0 in the

EEPROM can be corrupted.

Problem Fix/Workaround

Avoid using address 0 for storage, unless you can guarantee that you will not get

a reset during EEPROM write.

At voltages below 3.0 volts, serial programming might fail.

Problem Fix/Workaround

Keep V

in Power-down with External Clock Running

below 5.0 volts at room temperature when performing a chip erase.

at 3.0 volts or higher during In-System Programming.

or Temperature

8-bit

Microcontroller

with 2K Bytes

In-System

Programmable

Flash

AT90S/LS2343

Rev. G

Errata Sheet

Rev. 2495A–10/01

Related parts for AT90LS2343-1SI

AT90LS2343-1SI Summary of contents

Page 1

Errata • Releasing Reset Condition without Clock • Clearing Lock-bits at High V or Temperature CC • Wrong Clearing of XTRF in MCUSR • Reset during EEPROM Write • Serial Programming at Voltages below 3.0 Volts • High I in ...

Page 2

High I in Power-down with External Clock Running CC When the external clock is running while the device is in Power-down, the power consumption will be higher that specified. Problem Fix/Workaround Stop the external clock while the device is ...

Page 3

... No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical components in life support devices or systems. ...

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