EFM32WG Datasheet, PDF (194/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

Figure 14.31. EBI ECC Generation
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Byte 0
Byte 1
Byte 2
Byte 3
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8 '
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8 '
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8
P1 6 '
P32' . . .
P1 6
Byte N-4
Byte N-3
Byte N-2
Byte N-1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8 '
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8 '
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
P8
P1
P1 '
P1
P1 '
P1
P1 '
P1
P1 '
P2
P2 '
P2
P2 '
P4
P4 '
P1 6 '
P3 2
P1 6
...
Table 14.8. EBI ECC Bit/Column Parity
Parity bit
P1'
P1
P2'
P2
P4'
P4
Table 14.9. EBI ECC Byte/Row Parity
Parity bit
RP(x)
Generation for 8-bit data
Bit 6 xor Bit 4 xor Bit 2 xor Bit 0 xor P1'
Bit 7 xor Bit 5 xor Bit 3 xor Bit 1 xor P1
Bit 5 xor Bit 4 xor Bit 1 xor Bit 0 xor P2'
Bit 7 xor Bit 6 xor Bit 3 xor Bit 2 xor P2
Bit 3 xor Bit 2 xor Bit 1 xor Bit 0 xor P4'
Bit 7 xor Bit 6 xor Bit 5 xor Bit 4 xor P4
Generation for 8-bit data
Byte(x)(7) xor Byte(x)(6) xor Byte(x)(5) xor Byte(x)(4) xor
Byte(x)(3) xor Byte(x)(2) xor Byte(x)(1) xor Byte(x)(0)
P8'
P8
P16'
P16
RP(0) xor RP(2) xor RP(4) xor RP(6) xor ... xor RP(N-4) xor
RP(N-2)
RP(1) xor RP(3) xor RP(5) xor RP(7) xor ... xor RP(N-3)xor
RP(N-1)
RP(0) xor RP(1) xor RP(4) xor RP(5) xor ... xor RP(N-4) xor
RP(N-3)
RP(2) xor RP(3) xor RP(6) xor RP(7) xor ... xor RP(N-2) xor
RP(N-1)
Etc.
Etc.
The generated ECC code can be read from the EBI_ECCPARITY register according to the format shown
in Figure 14.32 (p. 195) . The number of valid ECC bits depends on the number of transferred bytes
during the time that the ECC hardware is running as indicated in Table 14.10 (p. 195) .
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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