SRAM 4 Click Board™

Product Code: MIKROE-4835

How Does The SRAM 4 Click Board™ Work? The SRAM 4 Click Board™ is based on the CY14B512Q, a 512Kbit nvSRAM memory organized as 64K words of 8 bits each from Cypress Semiconductor, now part of Infineon. The nvSRAM specifies one million endurance cycles for nonvolatile cells with data retention of a minimum of 20 years. All the reads and writes to nvSRAM happen to the SRAM, which gives nvSRAM the unique capability to handle infinite writes to the memory. The embedded nonvolatile elements incorporate the QuantumTrap technology, making this Click board™ an ideal choice for secure data storage creating the world's most reliable nonvolatile memory. The CY14B512Q communicates with MCU through a standard SPI interface that enables very high clock speeds up to 40MHz with zero cycle delay read and write cycles. It also supports the two most common modes, SPI Mode 0 and 3, and 104 MHz SPI access speed with special instruction for the read operation. Besides, the SRAM 4 Click also has an additional HOLD signal, routed to the PWM pin of the mikroBUS™ socket labelled as HLD, used to suspend the serial communication without resetting the serial sequence.

The CY14B512Q uses the standard SPI opcodes for memory access. In addition to the general SPI instructions for reading and writing, also provide four special instructions: STORE, RECALL, AutoStore Disable, and AutoStore Enable. The significant benefit of this memory over serial EEPROMs is that all reads and writes to nvSRAM are performed at the speed of the SPI bus with zero cycle delay. Therefore, no wait time is required after any of the memory accesses. Only the STORE and RECALL operations need finite time to complete, and all memory accesses are inhibited during this time. The SRAM 4 Click Board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development. Specifications Type SRAM Applications Can be used for all applications requiring fast access, high reliability of stored data, and unlimited endurance On-board modules CY14B512Q - 512Kbit nvSRAM memory organized as 64K words of 8 bits each from Cypress Semiconductor, now part of Infineon Key Features Low power consumption, high reliability, QuantumTrap technology, infinite read write and RECALL cycles, high-speed interface, HOLD feature, and more Interface SPI Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V Pinout diagram This table shows how the pinout on SRAM 4 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 HLD SPI Suspension NC 2 RST INT 15 NC SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC SPI Data OUT SDO 5 MISO SCL 12 NC SPI Data IN SDI 6 MOSI SDA 11 NC Power Supply 3.3V 7 3.3V 5V 10 NC Ground GND 8 GND GND 9 GND Ground Onboard settings and indicators Label Name Default Description LD1 PWR - Power LED Indicator SRAM 4 Click electrical specifications Description Min Typ Max Unit Supply Voltage - 3.3 - V Memory Size - - 512 Kbit Write Endurance 1.000.000