AT90LS2343-4SI Atmel, AT90LS2343-4SI Datasheet
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AT90LS2343-4SI
Manufacturer Part Number
AT90LS2343-4SI
Description
IC MCU 2K FLASH 4MHZ LV 8-SOIC
Manufacturer
Atmel
Series
AVR® 90LSr
Specifications of AT90LS2343-4SI
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90LS2343-4SI
Manufacturer:
FUJI
Quantity:
12
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
CC
in Power-down with External Clock Running
CC
CC
below 5.0 volts at room temperature when performing a chip erase.
at 3.0 volts or higher during In-System Programming.
CC
or Temperature
CC
or Temperature
8-bit
Microcontroller
with 2K Bytes
In-System
Programmable
Flash
AT90S/LS2343
Rev. G
Errata Sheet
Rev. 2495A–10/01
1
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AT90LS2343-4SI 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. ...