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EERAM 3.3V click

MIKROE-2728

Add memory to your project with EERAM 3.3V click. It carries the 47L16 EERAM, a 16Kbit SRAM with EEPROM Backup from Microchip. The click is designed to run on a 3.3V power supply. It communicates with the target microcontroller over I2C interface, with additional functionality provided by the INT pin on the mikroBUS™ line.

More details

$14.00

Quantity Unit Price
5 $13.30
20 $12.60

Add memory to your project with EERAM 3.3V click. It carries the 47L16 EERAM, a 16Kbit SRAM with EEPROM Backup from Microchip. The click is designed to run on a 3.3V power supply. It communicates with the target microcontroller over I2C interface, with additional functionality provided by the INT pin on the mikroBUS™ line.

47L16 features

The Microchip Technology Inc 47L16 EERAM is a 16Kbit SRAM with EEPROM Backup. The I2C EERAM Memory is a Low-Cost NVSRAM that Eliminates the Need for an External Battery to Retain Data. The device is organized as 2048x8 bits and utilizes the I2C serial interface. The 47L16 provides infinite read and write cycles to the SRAM while the EEPROM cells provide high endurance non-volatile storage of Data. With an external capacitor, SRAM data is automatically transferred to the EEPROM upon power-loss. Data can also be transferred manually by using either the hardware store pin or by software control. Upon power-up, the EEPROM data is automatically recalled to the SRAM. Recall can also be initiated through software control. The unlimited endurance makes the EERAM useful in applications that need to constantly monitor or record data.

Specifications

Type EEPROM
Applications Additional memory for your projects
On-board modules 47L16 I2C serial EERAM from Microchip
Key Features 16K bits density, 1 MHz Maximum clock frequency, Automatic Store to EEPROM upon power-down (using optional external capacitor)
Key Benefits Retain the contents of the SRAM memory when system power is lost
Interface I2C
Input Voltage 3.3V
Click board size S (28.6 x 25.4 mm)

Pinout diagram

This table shows how the pinout on EERAM 3.3V click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.pngPinNotes
NC 1 AN PWM 16 NC
NC 2 RST INT 15 HS Hardware store
NC 3 CS TX 14 NC
NC 4 SCK RX 13 NC
NC 5 MISO SCL 12 SCL SCL I2C line
NC 6 MOSI SDA 11 SDA SDA I2C line
Power supply +3.3V 7 3.3V 5V 10 NC
Ground GND 8 GND GND 9 GND Ground

Jumpers and settings

DesignatorNameDefault PositionDefault OptionDescription
A1 A1 Left 0 Address select 1
A2 A2 Left 0 Address select 2
SW1 SW1 Down OFF Automatic store data or manual

Buttons and LEDs

DesignatorNameTypeDescription
PWR PWR LED Power Indication LED

Programming

Code examples for EERAM 3.3V click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet reads data from the SRAM memory location, then writes to it, then reads it again to verify that write. It then copies the SRAM contents to EERAM memory.

01  //Read and write test
02     LOG ("rnrnReading 11 bytes of SRAM memory, from addresses 0x0100:");
03     EERAM_read (0x01, 0x00, readData, 11);
04     outputHex (readData, 11);
05 
06    LOG ("rnrnWriting values 0x42 to SRAM memory");
07     LOG (", at addresses 0x0100 - 0x0105...");
08     memset (writeData, 0x42, 6);
09     EERAM_write (0x01, 0x00, writeData, 6);
10     
11    LOG ("rnrnReading 11 bytes of SRAM memory, from addresses 0x0100:");
12     EERAM_read (0x01, 0x00, readData, 11);
13     outputHex (readData, 11);
14     
15    //Storing test
16     LOG ("rnrnStoring SRAM data to EERAM memory...");
17     EERAM_command (_EERAM_CMD_STORE);

Downloads

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