SRAM 3 Click Board™

How Does The SRAM 3 Click Board™ Work?

The SRAM 3 Click Board™ is based on the ANV32AA1WDK66, a serial non-volatile SRAM with double memory architecture and SPI serial interface organized as 128k words of 8 bits each from Anvo-System Dresden. This memory has a silicon-oxide-nitride-oxide-silicon (SONOS) flash storage element included with each memory cell. In the case of an unforeseeable operating voltage drop below a defined value, the SONOS technology enables non-volatile storage of all data in less than 15ms. An integrated Power Down functionality of the SRAM 3 Click with a standby current of less than 1µA ensures its low power consumption, with recovery time from Power-Down Mode of typically of 60µs.

This ANV32AA1WDK66 possesses unique safety features, such as Checksum Protected Memory Accesses (Secure READ and Secure WRITE instructions) and Time Monitoring that ensures a high degree of reliability of this Click board™. Corrupt data cannot overwrite existing memory content, and even valid data would not overwrite on a corrupted address. The SRAM 3 Click also provides some distinctive advantages of SRAMs, such as fast access times and unlimited write/read endurance.

The SRAM 3 Click Board™ incorporates an additional IC, labelled as the TXB0108PWR, an 8-bit bidirectional voltage level translator from Texas Instruments. This allows the Click board™ to be used with a much extensive range of MCUs. At the same time, the TXB0108PWR protects the ANV32AA1WDK66 from the Electrostatic Discharges (ESD) up to ±15 kV, making SRAM 3 Click a very reliable embedded storage solution.

The ANV32AA1WDK66 communicates with MCU using the standard SPI serial interface that supports modes 0 and 3 with a maximum frequency of 66 MHz. It also possesses additional HOLD function routed at the PWM pin of the mikroBUS™ socket labelled as HLD. This pin is used in conjunction with the CS pin to select the device. When the device is selected, and a serial sequence is underway, an HLD pin can be used to pause the serial communication with the master device without resetting the serial sequence.

The SRAM 3 Click Board™ is designed to be operated with both 3.3V and 5V logic levels that can be selected via VCC SEL jumper. This allows for both 3.3V and 5V capable MCUs to use the SPI communication lines properly. However, the Click board™ comes equipped with a library that contains easy to use functions and an example code that can be used as a reference for further development.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout of the SRAM 3 Click Board™ 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	HOLD
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	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

ONBOARD SETTINGS AND INDICATORS

SRAM 3 CLICK ELECTRICAL SPECIFICATIONS