PXR40RM Datasheet, PDF (492/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Error Correction Status Module (ECSM)
Table 17-12. PECSM_RESR Field Descriptions
Field
0–7
RESR
Description
RAM ECC Syndrome Register. This 8-bit syndrome field includes 7 bits of Hamming decoded parity plus an
odd-parity bit for the entire 72-bit (64-bit data + 8 ECC) code word. The upper 7 bits of the syndrome specify the
exact bit position in error for single-bit correctable codewords, and the combination of a non-zero 7-bit syndrome
plus overall incorrect parity bit signal a multi-bit, non-correctable error.
For correctable single-bit errors, the mapping shown in associates the upper 7 bits of the syndrome with the data
bit in error.
ECSM_
RESR[0:7]
0x00
0x01
0x02
0x04
0x08
0x0B
0x0E
0x10
0x13
0x15
0x16
0x19
0x1A
0x1C
0x20
0x23
0x25
0x26
0x29
0x2A
0x2C
0x31
0x34
0x40
0x4A
Data Bit in Error
No Error
ECC[0]
ECC[1]
ECC[2]
ECC[3]
DATA[17]
DATA[16]
ECC[4]
DATA[18]
DATA[19]
DATA[20]
DATA[21]
DATA[22]
DATA[23]
ECC[5]
DATA[8]
DATA[9]
DATA[10]
DATA[11]
DATA[12]
DATA[13]
DATA[14]
DATA[15]
ECC[6]
DATA[33]
Table 17-13.
ECSM_
RESR[0:7]
0x4F
0x52
0x54
0x57
0x58
0x5B
0x5D
0x62
0x64
0x67
0x68
0x6B
0x6D
0x70
0x75
0x80
0x8A
0x8F
0x92
0x94
0x97
0x98
0x9B
0x9D
0xA2
Data Bit in Error
DATA[32]
DATA[34]
DATA[35]
DATA[36]
DATA[37]
DATA[38]
DATA[39]
DATA[56]
DATA[57]
DATA[58]
DATA[59]
DATA[60]
DATA[61]
DATA[62]
DATA[63]
ECC[7]
DATA[49]
DATA[48]
DATA[50]
DATA[51]
DATA[52]
DATA[53]
DATA[54]
DATA[55]
DATA[40]
ECSM_
RESR[0:7]
0xA4
0xA7
0xA8
0xAB
0xAD
0xB0
0xB5
0xCB
0xCE
0xD3
0xD5
0xD6
0xD9
0xDA
0xDC
0xE3
0xE5
0xE6
0xE9
0xEA
0xEC
0xF1
0xF4
Others
Data Bit in Error
DATA[41]
DATA[42]
DATA[43]
DATA[44]
DATA[45]
DATA[46]
DATA[47]
DATA[1]
DATA[0]
DATA[2]
DATA[3]
DATA[4]
DATA[5]
DATA[6]
DATA[7]
DATA[24]
DATA[25]
DATA[26]
DATA[27]
DATA[28]
DATA[29]
DATA[30]
DATA[31]
Multiple
17-14
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor