S9S12XS256J0CAL Datasheet, PDF (507/738 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 18
256 KByte Flash Module (S12XFTMR256K1V1)
Revision
Number
V01.04
V01.05
V01.06
Table 18-1. Revision History
Revision
Date
03 Jan 2008
19 Dec 2008
25 Sep 2009
Sections
Affected
Description of Changes
- Cosmetic changes
18.1/18-507 - Clarify single bit fault correction for P-Flash phrase
18.4.2.4/18-542 - Add statement concerning code runaway when executing Read Once,
18.4.2.6/18-544 Program Once, and Verify Backdoor Access Key commands from Flash block
18.4.2.11/18-54 containing associated fields
7
- Relate Key 0 to associated Backdoor Comparison Key address
18.4.2.11/18-54 - Change “power down reset” to “reset” in Section 18.4.2.11
7
18.4.2.11/18-54
7
The following changes were made to clarify module behavior related to Flash
register access during reset sequence and while Flash commands are active:
18.3.2/18-514 - Add caution concerning register writes while command is active
18.3.2.1/18-516 - Writes to FCLKDIV are allowed during reset sequence while CCIF is clear
18.4.1.2/18-536 - Add caution concerning register writes while command is active
18.6/18-556 - Writes to FCCOBIX, FCCOBHI, FCCOBLO registers are ignored during
reset sequence
18.1 Introduction
The FTMR256K1 module implements the following:
• 256 Kbytes of P-Flash (Program Flash) memory
• 8 Kbytes of D-Flash (Data Flash) memory
The Flash memory is ideal for single-supply applications allowing for field reprogramming without
requiring external high voltage sources for program or erase operations. The Flash module includes a
memory controller that executes commands to modify Flash memory contents. The user interface to the
memory controller consists of the indexed Flash Common Command Object (FCCOB) register which is
written to with the command, global address, data, and any required command parameters. The memory
controller must complete the execution of a command before the FCCOB register can be written to with a
new command.
S12XS Family Reference Manual, Rev. 1.13
Freescale Semiconductor
507