MEC1404 SIO Programmable or Non-Programmable

MEC1404 SIO Programmable Or Non-Programmable? Let's Understand Difference between rom & ram.

MEC1404 SIO Programmable or Non-Programmable

Today, we will delve into the intriguing world of MEC1404 programmable devices. Many of you have asked about its capabilities, and I’m here to clarify the matter. Let’s start by understanding what makes the MEC1404 unique and how it differs from ROM-based systems.

What is MEC1404 Programmable?

  • MEC1404 is a programmable device that has gained attention recently.

  • Some confusion has arisen because it is being mentioned alongside ROM-based systems.

  • However, the primary difference lies in the type of memory used in the MEC1404: SRAM (Static Random-Access Memory), not ROM (Read-Only Memory).

RAM vs ROM – What’s the Difference?

RAM (Random-Access Memory) and ROM (Read-Only Memory) are two types of memory used in electronic devices, each with distinct characteristics.

  1. RAM (SRAM):

    • RAM is volatile memory, which means it does not retain data when the power is turned off.

    • It provides fast read and write access, making it ideal for temporary storage.

    • In the case of the MEC1404, the custom firmware image code and data are downloaded from the system’s main BIOS (Basic Input/Output System) when the device receives power.

  2. ROM:

    • ROM is non-volatile memory, meaning it retains data even without power.

    • It typically stores permanent instructions or data that should remain the same.

    • Since ROM has data after powering off, programs can be written and stored permanently.

Programming the MEC1404: The Process

  • Since the MEC1404 uses SRAM (RAM) as its memory, it is unsuitable for permanently storing programs or firmware.

  • Instead, when the device receives power, it downloads the custom firmware image code and data from the system’s main BIOS.

  • This process ensures the MEC1404 is up and running with the required firmware to perform its intended functions.

However, here’s the catch:

  • When the power is turned off, the SRAM loses all its stored data, effectively wiping out the custom firmware.

  • So, each time you turn on the MEC1404, it needs to download the firmware again from the main BIOS to function correctly.

Datasheet Highlights: Evidence of MEC1404’s SRAM-Based Programmability

  • To support this understanding, I’ve uploaded some datasheet highlights demonstrating the MEC1404’s SRAM-based nature.

  • You can refer to these highlights to see the technical details backing up this information.


  • The MEC1404 is a programmable device, but its programming process differs significantly from traditional ROM-based systems.

  • With SRAM as its memory, it can download and execute custom firmware from the system’s main BIOS when powered on.

  • However, it is essential to remember that this firmware is not permanently stored and needs to be downloaded each time the power is turned on.

Download Data-Sheet MEC1404


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