ATTINY15L-1PC Atmel, ATTINY15L-1PC Datasheet - Page 38
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ATTINY15L-1PC
Manufacturer Part Number
ATTINY15L-1PC
Description
IC AVR MCU 1K FLASH 2.7V 8DIP
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY15L-1PC
Core Processor
AVR
Core Size
8-Bit
Speed
1.6MHz
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
Program Memory Size
1KB (512 x 16)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Ram Size
-
Connectivity
-
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Preventing EEPROM
Corruption
38
ATtiny15L
The user should poll the EEWE bit before starting the read operation. If a write operation
is in progress when new data or address is written to the EEPROM I/O Registers, the
write operation will be interrupted and the result is undefined.
The calibrated oscillator is used to time EEPROM. In Table 16 the typical programming
time is listed for EEPROM access from the CPU.
Table 16. Typical EEPROM Programming Times
During periods of low V
age is too low for the CPU and the EEPROM to operate properly. These issues are the
same as for board-level systems using the EEPROM and the same design solutions
should be applied.
An EEPROM data corruption can be caused by two situations when the voltage is too
low. First, a regular write sequence to the EEPROM requires a minimum voltage to
operate correctly. Second, the CPU itself can execute instructions incorrectly if the sup-
ply voltage for executing instructions is too low.
EEPROM data corruption can easily be avoided by following these design recommen-
dations (one is sufficient):
1. Keep the AVR RESET active (low) during periods of insufficient power supply
2. Keep the AVR core in Power-down sleep mode during periods of low V
3. Store constants in Flash memory if the ability to change memory contents from
Parameter
EEPROM write
(from CPU)
voltage. This can be done by enabling the internal Brown-out Detector (BOD) if
the operating voltage matches the detection level. If not, an external low V
Reset Protection circuit can be applied.
will prevent the CPU from attempting to decode and execute instructions, effec-
tively protecting the EEPROM Registers from unintentional writes.
software is not required. Flash memory cannot be updated by the CPU and will
not be subject to corruption.
Number of Calibrated RC
Oscillator Cycles
CC
, the EEPROM data can be corrupted because the supply volt-
8192
Min Programming
4.6 ms
Time
Max Programming
8.2 ms
1187H–AVR–09/07
Time
CC
. This
CC