EFM32WG Datasheet, PDF (195/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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Figure 14.32. EBI EBI_ECCPARITY Format
EBI_ECCPARITY[ 31:24]
MSB
LSB
P32768 P32768' P16384 P16384' P8192 P8192' P4096 P4096'
EBI_ECCPARITY[ 23:16]
P2048 P2048' P1024 P1024' P512
P5 1 2 '
P2 5 6
P2 5 6 '
EBI_ECCPARITY[ 15:8]
P1 2 8
P1 2 8 '
P6 4
P6 4 '
P3 2
P3 2 '
P1 6
P1 6 '
EBI_ECCPARITY[ 7:0]
P8
P8 '
P4
P4 '
P2
P2 '
P1
P1 '
Table 14.10. EBI EBI_ECCPARITY valid bits
Number of data bytes used for ECC generation
256
512
1024
2048
4096
8192
Valid EBI_ECCPARITY bits
EBI_ECCPARITY[21:0]
EBI_ECCPARITY[23:0]
EBI_ECCPARITY[25:0]
EBI_ECCPARITY[27:0]
EBI_ECCPARITY[29:0]
EBI_ECCPARITY[31:0]
Software can compare, XOR, the parity data generated in EBI_ECCPARITY with the parity information
stored in the spare area for the used data set. The syndrome resulting from XOR'ing the valid
EBI_ECCPARITY bits with the ECC code read from the spare area can be used for error detection and
correction as shown in Table 14.11 (p. 195) .
Table 14.11. EBI Error Detection Result
Error Detection Result
No Error
1-bit Correctable Error
ECC Error
Uncorrectable Error
Syndrome
Syndrome has all valid Pn, Pn' bits 0
For all valid syndrome (Pn, Pn') pairs:
Pn = not(Pn')
1 bit of the XOR result is high
Other cases
Interpretation
No error has been detected
1 bit in the user main data is incorrect
and it can be corrected. For 8-bit wide
data the position of the incorrect bit is
indicated by bit pattern (P4, P2, P1); the
position of the incorrect byte is indicated
by (..., P32, P16, P8). For 16-bit wide
data the position of the incorrect bit
is (P8, P4, P2, P1); the incorrect byte
number is indicated by (..., P64, P32,
P16)
An error has been detected in the ECC
itself. No error has been detected in the
user data
Multiple (2 or more) bits are incorrect.
This error cannot be corrected
14.3.16 TFT Direct Drive
TFT Direct Drive can be used to automatically transfer frame data stored in either internal or external
memory to a TFT display without frame buffer. The EBI generates the necessary RGB control signals
for the TFT display and it coordinates and aligns the pixel data transfers accordingly. The Direct Drive
engine is enabled by setting the DD bitfield in the EBI_TFTCTRL register to either INTERNAL or
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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