Upon the receiving of the device ID byte, the AT24CM02 IC expects two more address bytes, completing the 18bit address word. Therefore, every data transaction event is initiated by the host MCU, transmitting the I2C START condition, followed by the AT24CM02 device ID byte. This Click board™ uses the I2C communication protocol. Both 100KHz and 400KHz transfer speeds are supported by the AT24CM02 IC, as well as the 1MHz Fast Mode Plus (FM+) I2C communication, for the MCUs with I2C modules that can support that speed. The I2C pins are routed to the mikroBUS™ so the communication is easy and straightforward. Having insight into how the memory cells are organized, is important for Write and Erase operations. One page holds 256 bytes and there are 1024 pages (1024 pages x 256 bytes = 262,144 bytes total). Furthermore, the EEPROM is organized in so-called pages. The EEPROM density is usually expressed in bits, so exactly 2,097,152 bits are organized in units or words of 8 bits, which gives 262,144 bytes of data memory. The EEPROM module used on the EEPROM 3 click is the AT24CM02, an I2C serial EEPROM from Microchip, with the memory cell density of 2 megabits (Mbit). It can be used for any kind of temporary or permanent data storage for various embedded electronic devices, simple data logging, storing various working parameters of a module or device, safeguarding the sensitive data in case of a power cycle, and other similar applications where reliable EEPROM memory is needed.

The EEPROM module on this click features Schmitt trigger inputs for better noise protection, self-timed write cycles, it has a dedicated write protect pin for hardware protection of stored data, and error detection and correction logic scheme that ensures reliable data output, staying transparent to the host controller.ĮEPROM 3 click is aimed towards industrial and commercial applications, which require low voltage and low power operational capabilities.

The used EEPROM module has outstanding endurance, with 1,000,000 write cycles and data retention period of over 100 years. In other words, this click board™ is an EEPROM memory medium with the capacity of 256 KB. EEPROM 3 click provides 2 Mbit (2,097,152 bits) of Electrically Erasable Programmable Read Only Memory, organized in bytes.

Picbasic pro 3 EEPROM read