K60P100M100SF2RM Datasheet, PDF (645/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

28.4.3 FlexNVM Description
Chapter 28 Flash Memory Module (FTFL)
This section describes the FlexNVM memory. This section does not apply for devices
that contain only program flash memory.
28.4.3.1 FlexNVM Block Partitioning for FlexRAM
The user can configure the FlexNVM block as either:
• Basic data flash,
• EEPROM flash records to support the built-in EEPROM feature, or
• A combination of both.
The user's FlexNVM configuration choice is specified using the Program Partition
command described in Program Partition Command.
CAUTION
While different partitions of the FlexNVM block are available,
the intention is that a single partition choice is used throughout
the entire lifetime of a given application. The FlexNVM
partition code choices affect the endurance and data retention
characteristics of the device.
28.4.3.2 EEPROM User Perspective
The EEPROM system is shown in the following figure.
User access
FlexRAM
(effective
EEPROM)
File
system
handler
EEPROM backup
with 1KByte
erase sectors
Figure 28-31. Top Level EEPROM Architecture
To handle varying customer requirements, the FlexRAM and FlexNVM blocks can be
split into partitions as shown in the figure below.
1. EEPROM partition (EEESIZE) — The amount of FlexRAM used for EEPROM
can be set from 0 Bytes (no EEPROM) to the maximum FlexRAM size (see Table
28-2). The remainder of the FlexRAM is not accessible while the FlexRAM is
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
645