BMSKTOPASA900(DCE) Toshiba, BMSKTOPASA900(DCE) Datasheet - Page 316

• Manufacturer Part Number: BMSKTOPASA900(DCE)
• Description: KIT STARTER TMPA900 USB JTAG
• Manufacturer: Toshiba
• Series: TOPASr
• Type: MCUr

Specifications of BMSKTOPASA900(DCE)

• Contents: Evaluation Board, Cable(s), Software and Documentation
• For Use With/related Products: TMPA900CMXBG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note : If the error address (after conversion) is in the range of 0x000 to 0x007, it indicates that an error bit exists in
Reed-Solomon ECC
1. If the error address indicated by the NDRSCAn register is in the range of 0x000 to
2. If the error address indicated by the NDRSCAn register is in the range of 0x008 to
redundant area (ECC). In this case, no error correction is needed. If the number of error bits is not more than
4 symbols, the Reed-Solomon ECC calculation method calculates each error bit precisely even if it is in the
redundant area (ECC).
Example 1: When NDRSCAn = 0x005 and NDRSCDn = 0x04 = 0y0000_0100
Example 2: When NDRSCAn = 0x083 and NDRSCDn = 0x81 = 0y1000_0001
0x007, this error exists in the ECC area and no correction is needed in this case. (It
is not able to correct the error in the ECC area. Note, however, that if the error
exists in the ECC area, this LSI has only the ability to correct errors up to 4 symbols
including the error in the ECC area.
0x207, the error address is obtained by subtracting this address from 0x207.
• The ECC generator generates 80 bits of ECC for up to 518 bytes of valid data. If
• Basically no calculation is needed for error correction. If error detection is
the NAND-Flash memory to be used has a large-capacity page size (e.g. 2048
bytes), the error correction process must be repeated several times to cover the
entire page.
performed properly, the NDFC only needs to refer to the error address and error
bit. However, it may be necessary to convert the error address, as explained
below.
Because the error address is in the range of 0x000 to 0x007, no correction is needed.
(Although an error exists in bit 2, no correction is needed.)
Error correction is performed by inverting the data in bits 7 and 0 at address 0x184 (0x207 – 0x083).
TENTATIVE
TMPA900CM- 315
TMPA900CM
2009-10-14