The GALEP-4 will also allow you to program a number of Zero-power -RAMs.

Zero-power-RAMs are RAM devices that use very little power during stand-by operation. These devices are placed in a case together with a powerful battery and a voltage monitoring circuit.

As far as the target system is concerned, such devices behave like perfectly normal RAM devices that can be accessed via read and write functions.

In the event that the general power supply suffers a failure at the device however, the voltage monitoring sensor insures the standby supply of current to the RAM from the batteries.

Zeropower-RAMs are also often called nvRAMs.

Note: On devices with 4 bit data width only bits 0 - 3 (Low Nibble) of the data in the buffer are used, bits 4- 7 are ignored.