MC9S12HY64 Datasheet, PDF (613/792 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Chapter 17
64 KByte Flash Module (S12FTMRC64K1V1)
Revision
Number
V01.11
V01.12
V01.13
Table 17-1. Revision History
Revision
Date
28 Jul 2008
19 Dec 2008
25 Sep 2009
Sections
Affected
Description of Changes
17.1.1/17-614 - Remove reference to IFRON in Program IFR definition
17.3.1/17-617 - Remove reference to IFRON in Table 17-4 and Figure 17-3
17.1/17-613 - Clarify single bit fault correction for P-Flash phrase
17.4.5.4/17-647 - Add statement concerning code runaway when executing Read Once,
17.4.5.6/17-649 Program Once, and Verify Backdoor Access Key commands from Flash block
17.4.5.11/17-65 containing associated fields
3
- Relate Key 0 to associated Backdoor Comparison Key address
17.4.5.11/17-65 - Change “power down reset” to “reset”
3
- Reformat section on unsecuring MCU using BDM
17.4.5.11/17-65
3
17.5.2/17-661
The following changes were made to clarify module behavior related to Flash
register access during reset sequence and while Flash commands are active:
17.3.2/17-620 - Add caution concerning register writes while command is active
17.3.2.1/17-622 - Writes to FCLKDIV are allowed during reset sequence while CCIF is clear
17.4.3.2/17-640 - Add caution concerning register writes while command is active
17.6/17-662 - Writes to FCCOBIX, FCCOBHI, FCCOBLO registers are ignored during
reset sequence
17.1 Introduction
The FTMRC64K1 module implements the following:
• 64 Kbytes of P-Flash (Program Flash) memory
• 4 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.
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
613