Tag Archives: SPI

STM32F411RE Nucleo PCD8544/Nokia5110 Simplistic Chronograph (Timer) Program

A very simplistic timer implemented on an STM32 Nucleo board using a PCD8544 controller/Nokia 5110 LCD for display output. The display uses a memory buffer to construct the screen display, and sends the complete buffer to the LCD instead of … Continue reading

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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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Need More Memory? Arduino and 23LC1024

See this post for background information on interfacing the 23K256 SPI SRAM to the Arduino. Since the 23LC1024 is tolerant of 5V logic levels, it was much easier. However, note in the code below, the larger memory (1024K vs. 256K) … Continue reading

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Microchip 23K256/Arduino Transfer Rates

I used my Saleae Logic to time the transfer (read/write) rates between the Arduino and Microchip 23k256 SPI SRAM. See this post for more information on the Arduino and 23K256. Here is the program that was running on the Arduino: … Continue reading

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Interfacing Microchip 23K256 32KB SRAM SPI Memory with Arduino

My GPS Predictive Lap Timer Project needs more memory than the typical Arduino contains. However, it occurred to me that I could use a Microchip 23K256 32KB SRAM SPI memory chip and not need to revert to an Arduino Mega … Continue reading

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