SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 605

• Manufacturer Part Number: SC9S12XS256J1MAA
• Description: HCS12 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 20
64 KByte Flash Module (S12XFTMR64K1V1)
20.1
The FTMR64K1 module implements the following:
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.
Freescale Semiconductor
Revision
Number
V01.04
V01.05
V01.06
•
•
64 Kbytes of P-Flash (Program Flash) memory
4 Kbytes of D-Flash (Data Flash) memory
Introduction
19 Dec 2008
25 Sep 2009
03 Jan 2008
Revision
Date
20.4.2.4/20-640
20.4.2.6/20-642
20.4.2.11/20-64
20.4.2.11/20-64
20.4.2.11/20-64
20.3.2.1/20-615
20.4.1.2/20-634
20.3.2/20-613
20.1/20-605
20.6/20-654
Sections
Affected
6
6
6
S12XS Family Reference Manual, Rev. 1.09
Table 20-1. Revision History
- Cosmetic changes
- Clarify single bit fault correction for P-Flash phrase
- Add statement concerning code runaway when executing Read Once,
Program Once, and Verify Backdoor Access Key commands from Flash block
containing associated fields
- Relate Key 0 to associated Backdoor Comparison Key address
- Change “power down reset” to “reset” in
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
Preliminary
Description of Changes
Section 20.4.2.11
605