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M64403FP

ERROR CORRECTION WITH VARIABLE LENGTH AND DISTANCE

MITSUBISHI ELECTRIC  

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MITSUBISHI ICs (LSI)

M64403FP

ERROR CORRECTION WITH VARIABLE LENGTH AND DISTANCE

MICRO COMPUTER INTERFACE

Parameter register setting method (write) is described as follows.

(See page7 about sequence chart : See below diagram about

micro computer I/F and register table.)

1. Perform power on reset.

2. Set various parameters (code length-1, check byte length,

erasure correction threshold) to below parameter register table.

3. Set decode operation mode parameters to address-E. (See

address-E description)

See sequence chart page7 (micro computer I/F sequence) as for

read from parameter register, see below table as for register table.

Parameter register table

address (Hex) R/W

0

R/W

1

R/W

2

R/W

3

R/W

4

R/W

5

R/W

6

R/W

7

R/W

8

R/W

9

R/W

A

R/W

B

R/W

C

R

D

—

E

R/W

F

—

Initial (Hex)

00

00

00

00

00

00

00

00

00

00

00

00

—

—

—

—

set data (Hex)

≤FE

≤FE

≤FE

≤FE

≤10

≤10

≤10

≤10

≤10

≤10

≤10

≤10

—

—

—

—

description

code (0) code length-1

code (1) code length-1

code (2) code length-1

code (3) code length-1

code (0) check byte length

code (1) check byte length

code (2) check byte length

code (3) check byte length

code (0) erasure threshold

code (1) erasure threshold

code (2) erasure threshold

code (3) erasure threshold

real erasure counts which is derived from syndrome calculation

reserve

decode operation mode

reserve

Address-E description

address (Hex)

data

E

D7 D6 D5 D4 D3 D2 D1 D0

means "0" fixed.

D0 (bit0) 0:constrained error correction mode

D3 (bit3) 0:error value output mode

1:erasure correction priority mode

1:internal correction mode

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