Datasheet

Chapter 25 256 KByte Flash Module (S12XFTM256K2V1)
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 901
25.3.2 Register Descriptions
The Flash module contains a set of 20 control and status registers located between Flash module base +
0x0000 and 0x0013. A summary of the Flash module registers is given in Figure 25-4 with detailed
descriptions in the following subsections.
CAUTION
Writes to any Flash register must be avoided while a Flash command is
active (CCIF=0) to prevent corruption of Flash register contents and
Memory Controller behavior.
Table 25-7. EEE Nonvolatile Information Register Fields
Global Address
(EEEIFRON)
Size
(Bytes)
Description
0x12_0000 – 0x12_0001 2
D-Flash User Partition (DFPART)
Refer to Section 25.4.2.15, “Full Partition D-Flash Command”
0x12_0002 – 0x12_0003 2 D-Flash User Partition (duplicate
(1)
)
1. Duplicate value used if primary value generates a double bit fault when read during the reset sequence.
0x12_0004 – 0x12_0005 2
Buffer RAM EEE Partition (ERPART)
Refer to Section 25.4.2.15, “Full Partition D-Flash Command”
0x12_0006 – 0x12_0007 2 Buffer RAM EEE Partition (duplicate
1
)
0x12_0008 – 0x12_007F 120 Reserved
Address
& Name
76543210
0x0000
FCLKDIV
R FDIVLD
FDIV6 FDIV5 FDIV4 FDIV3 FDIV2 FDIV1 FDIV0
W
0x0001
FSEC
R KEYEN1 KEYEN0 RNV5 RNV4 RNV3 RNV2 SEC1 SEC0
W
0x0002
FCCOBIX
R0 0 0 0 0
CCOBIX2 CCOBIX1 CCOBIX0
W
0x0003
FECCRIX
R0 0 0 0 0
ECCRIX2 ECCRIX1 ECCRIX0
W
0x0004
FCNFG
R
CCIE
00
IGNSF
00
FDFD FSFD
W
0x0005
FERCNFG
R
ERSERIE PGMERIE
0
EPVIOLIE ERSVIE1 ERSVIE0 DFDIE SFDIE
W
Figure 25-4. FTM256K2 Register Summary