UM1479 datasheet(19/28 Pages) STMICROELECTRONICS

Il numero della parte	UM1479

Spiegazioni elettronici	The M24LR64-R is a dual interface EEPROM which targets a wide range of applications

PDF	28 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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19 / 28 page

UM1479

System overview

Doc ID 022381 Rev 1

19/28

System overview

This data logger demo is used to log the data of 6 sensor parameters inside the EEPROM

using the I2C communication. This logged data is retrieved from the EEPROM over the RF

interface using the RFID reader.

The M24LR64-R EEPROM has 8 Kbyte (8192 bytes) of memory. In this data logger

application, EEPROM memory is partitioned as follows:

RTC date and time: 8 bytes

Temperature sensor: 3064 bytes

Humidity sensor: 1024 bytes

Freefall: 1024 bytes

Vibration: 1024 bytes

Light: 1024 bytes

Tamper: 1024 bytes

Total values which can be logged in the EEPROM along with time stamping for each value

are:

For temperature: maximum 764 values

For humidity: maximum 254 values

For freefall: maximum 255 values

For vibration: maximum 255 values

For light: maximum 255 values

For tamper: maximum 255 values

If the log count for any sensor has reached its maximum value, the data logging for that

sensor stops. There is no overwriting of data for any sensor.

UM1479 Scheda tecnica(PDF) 19 Page - STMicroelectronics