SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 531
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SC9S12XS256J1MAA
Manufacturer Part Number
SC9S12XS256J1MAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.SC9S12XS256J1MAA.pdf
(736 pages)
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The P-Flash word addressed by ECCRIX = 001 contains the lower 16 bits of the global address. The
following four words addressed by ECCRIX = 010 to 101 contain the 64-bit wide data phrase. The four
data words and the parity byte are the uncorrected data read from the P-Flash block.
The D-Flash word addressed by ECCRIX = 001 contains the lower 16 bits of the global address. The
uncorrected 16-bit data word is addressed by ECCRIX = 010.
18.3.2.15 Flash Option Register (FOPT)
The FOPT register is the Flash option register.
All bits in the FOPT register are readable but are not writable.
Freescale Semiconductor
GADDR[22:16]
Offset Module Base + 0x0010
Reset
PAR[7:0]
Field
15:8
6–0
W
R
F
7
ECC Parity Bits — Contains the 8 parity bits from the 72 bit wide P-Flash data word or the 6 parity bits,
allocated to PAR[5:0], from the 22 bit wide D-Flash word with PAR[7:6]=00.
Global Address — The GADDR[22:16] field contains the upper seven bits of the global address having
caused the error.
ECCRIX[2:0]
= Unimplemented or Reserved
000
001
010
011
100
101
110
111
F
6
Table 18-26. FECCR Index=000 Bit Descriptions
Figure 18-22. Flash Option Register (FOPT)
S12XS Family Reference Manual, Rev. 1.09
Parity bits read from
Table 18-25. FECCR Index Settings
Flash block
Bits [15:8]
F
5
Not used, returns 0x0000 when read
Not used, returns 0x0000 when read
Data 1 [15:0] (P-Flash only)
Data 2 [15:0] (P-Flash only)
Data 3 [15:0] (P-Flash only)
FECCR Register Content
F
4
Global address [15:0]
NV[7:0]
Description
Data 0 [15:0]
Bit[7]
0
F
3
256 KByte Flash Module (S12XFTMR256K1V1)
Global address
F
2
Bits[6:0]
[22:16]
F
1
F
0
531
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