Datasheet

MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 891
Chapter 25
256 KByte Flash Module (S12XFTM256K2V1)
25.1 Introduction
The FTM256K2 module implements the following:
• 256 Kbytes of P-Flash (Program Flash) memory, consisting of 2 physical Flash blocks, intended
primarily for nonvolatile code storage
Table 25-1. Revision History
Revision
Number
Revision
Date
Sections
Affected
Description of Changes
V01.08 14 Nov 2007 25.5.2/25-951
25.4.2/25-927
25.4.2.8/25-933
- Changed terminology from ‘word program’ to “Program P-Flash’ in the BDM
unsecuring description, Section 25.5.2
- Added requirement that user not write any Flash module register during
execution of commands ‘Erase All Blocks’, Section 25.4.2.8, and ‘Unsecure
Flash’, Section 25.4.2.11
- Added statement that security is released upon successful completion of
command ‘Erase All Blocks’, Section 25.4.2.8
V01.09 19 Dec 2007 25.4.2.5/25-930
25.4.2/25-927
25.3.1/25-896
- Corrected Error Handling table for Load Data Field command
- Corrected Error Handling table for Full Partition D-Flash, Partition D-Flash,
and EEPROM Emulation Query commands
- Corrected P-Flash IFR Accessibility table
V01.10 25 Sep 2009 25.1/25-891
25.3.2.1/25-903
25.4.2.4/25-930
25.4.2.7/25-932
25.4.2.12/25-
936
25.4.2.12/25-
936
25.4.2.12/25-
936
25.4.2.20/25-
945
25.3.2/25-901
25.3.2.1/25-903
25.4.1.2/25-922
25.6/25-951
- Clarify single bit fault correction for P-Flash phrase
- Expand FDIV vs OSCCLK Frequency table
- Add statement concerning code runaway when executing Read Once
command from Flash block containing associated fields
- Add statement concerning code runaway when executing Program Once
command from Flash block containing associated fields
- Add statement concerning code runaway when executing Verify Backdoor
Access Key command from Flash block containing associated fields
- Relate Key 0 to associated Backdoor Comparison Key address
- Change “power down reset” to “reset”
- Add ACCERR condition for Disable EEPROM Emulation command
The following changes were made to clarify module behavior related to Flash
register access during reset sequence and while Flash commands are active:
- Add caution concerning register writes while command is active
- Writes to FCLKDIV are allowed during reset sequence while CCIF is clear
- Add caution concerning register writes while command is active
- Writes to FCCOBIX, FCCOBHI, FCCOBLO registers are ignored during
reset sequence