User guide

Chapter 5
Data Retention System
Introduction
In This
Chapter
The EF51R and EF52R ISEs contain advanced hardware and
firmware that protect the data in the memory arrays from loss
in case of power or other system failure.
This chapter discusses the following features of the integrated
data retention system:
Continuously saving data
Restoring data on line
Battery testing and monitoring
Fast charge circuit
Automatic write protect
Comprehensive battery test
5–1