NXP Semiconductors MPC5644A, Reference Manual, Page: 1611 / 1735

FlexRay Communication Controller (FlexRay)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 1611
This coding of the checkbit ensures that neither 0x000 nor 0xFFF are valid code words and written into
the memory
33.6.24.2.2 PE DRAM syndrome
The coding of the syndrome reported in ECC Error Report Code Register (FR_EERCR) for PE DRAM
memory errors is shown in Table 33-132 .
Table 33-131. PE DRAM checkbits coding
CODE
CODE DATA
3 2 1 0 7 6 5 4 3 2 1 0
4
1
1
The checkbit CODE[4] is set to 1 if and only if there is a even number of 1’s in columns with X.
X X X X X X X X X X X X
3
2
2
The checkbits CODE[3]... CODE[0] are set to 1 if and only if there is a odd number of 1’s in all columns with X.
— — — — X X X X — — — —
2 — — — — X — — — X X X —
1 — — — — — X X — X X — X
0 — — — — — X — X X — X X