Tag Archives: fram

STM32F411RE Nucleo 40MHz SPI with Cypress FM25CL64B FRAM

Previously, I tested a Cypress FRAM memory chip with the Arduino. A feature of FRAM memory is the speed at which it can be accessed. Cypress claims the FM25xxx chips can operate at 40MHz, however the maximum speed for SPI … Continue reading

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Arduino Mode0 SPI Bit Bang and Bare Metal Hardware SPI

Here are two additional versions of the SPI program from my previous post. The first of these programs use a “bare-metal” version of hardware SPI. The second is a bit-bang version using different pins. How does the speed compare between … Continue reading

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Arduino and Cypress SPI FM25CL64B FRAM

The FM25CL64B is a 64K-bit ferroelectric RAM (F-RAM or FRAM) memory chip. Unlike typical flash and EEPROM memory, FRAM is capable of performing write operations at bus speed. According to the Cypress datasheet, this FRAM chip is capable of being … Continue reading

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