Information

FlexNVM

FlexRAM

Program flash

EEPROM backup

To MCU's

flash controller

Interrupt

Control

registers

Status

registers

Data flash

Memory controller

Figure 28-1. Flash Block Diagram

28.1.3 Glossary

Command write sequence — A series of MCU writes to the flash FCCOB register

group that initiates and controls the execution of flash algorithms that are built into the

flash memory module.

Data flash memory — Partitioned from the FlexNVM block, the data flash memory

provides nonvolatile storage for user data, boot code, and additional code store.

Data flash sector — The data flash sector is the smallest portion of the data flash

memory that can be erased.

EEPROM — Using a built-in filing system, the flash memory module emulates the

characteristics of an EEPROM by effectively providing a high-endurance, byte-writeable

(program and erase) NVM.

EEPROM backup data header — The EEPROM backup data header is comprised of a

32-bit field found in EEPROM backup data memory which contains information used by

the EEPROM filing system to determine the status of a specific EEPROM backup flash

sector.

Introduction

K20 Sub-Family Reference Manual, Rev. 2, Feb 2012

500 Freescale Semiconductor, Inc.