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Reprogramming Factory Programmed CY22393/4/5 Devices. | Cypress Semiconductor

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Reprogramming Factory Programmed CY22393/4/5 Devices.

Last Updated: September 19, 2011

Can the Factory programmed CY22393/4/5 devices be re-programmed in the field?


One cannot field program the non-volatile memory registers of a factory programmed

CY22393/4/5 programmable clock using our CY3672-USB Hardware Programmer. The non-volatile memory registers of our

CY22393/4/5 devices could be re-programmed at the Factory only. Please contact your FAE or Local Sales Representative any Factory programming assistance.

As these devices have SDAT and SCLK pins for I2C programming, you have an option to re-program only the volatile memory registers of the factory programmed devices In-system. This means that when you Power On the device, it will run with the Power On factory programmed configuration which is present in the non-volatile memory registers. Later, you can change the configuration by making changes to the volatile memory registers using I2C. Now, this change will last as long as the device is powered. The new configuration will be lost once the device is powered down and the next time when it is Powered ON, it will have the factory programmed configuration.

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