MD2241-D128-V3 M-Systems Inc., MD2241-D128-V3 Datasheet - Page 27

• Manufacturer Part Number: MD2241-D128-V3
• Description: Diskonchip Dimm Plus
• Manufacturer: M-Systems Inc.

7.7
Description:
Address (hex):
Type:
Reset Value:
27
ERROR
Bit No.
1, 4, 6
Bit 7
0
2
3
5
7
Toggle Bit Register
IGNORE. When set to a 1, data read from or written to the Flash Data register is not processed by
the ECC unit.
Reserved for future use
TOGGLE. This read only bit toggles on consecutive reads and serves to identify the presence of
the device.
ECC_EN (ECC Enable).
0: Resets the ECC logic and reloads the ECC Syndrome Register[5:0] with their Reset values.
1: Enables the Reed-Solomon ECC and parity generators, allowing new data to be clocked into the
ECC unit.
ECC_RW (ECC Read/Write).
0: The ECC unit is in ‘Read Mode’. In this mode, a block of data and the 6-byte syndrome are read
from flash memory into the ECC unit and are checked for errors. The status of the error detection
process is indicated by the state of the ERROR bit.
1: The ECC unit is put into ‘Write Mode’, where a block of data (512 bytes) is passed through the
ECC unit as it is written into the flash memory. At the end of this pass, TrueFFS reads the 6-byte
syndrome from the ECC Control Register and writes it into the flash.
ERROR. This bit is read only. After reading a block of data and six ECC syndrome bytes, this bit
should be examined.
0: No error detected
1: Error detected
This register controls the Reed-Solomon ECC logic.
1046
Read/Write (except for bits 2 and 7 which are Read Only)
82H
Bit 6
RFU
ECC_RW
Bit 5
Preliminary Data Sheet, Rev. 1.2
RFU_0
Bit 4
Description
ECC_EN
Bit 3
TOGGLE
Bit 2
RFU_1
Bit 1
DiskOnChip DIMM Plus
94-SR-002-08-8L
IGNORE
Bit 0