Host Interface

4.5.9 PACKET (A0h)

 

 

 

Table 4.30 PACKET command

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

6

 

5

 

4

 

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

CM

1

0

1

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

DH

X

X

 

X

 

DEV

 

X

X

X

X

 

 

 

 

 

 

 

 

 

 

 

CH

 

 

 

 

Byte Count Limit (15-8)

 

 

 

 

 

 

 

 

 

 

 

 

CL

 

 

 

 

Byte Count Limit (7-0)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SN

X

X

 

X

 

X

 

X

X

X

X

 

 

 

 

 

 

 

 

 

 

 

 

SC

X

X

 

X

 

X

 

X

X

X

X

 

 

 

 

 

 

 

 

 

 

 

 

FR

X

X

 

X

 

X

 

X

X

X

X

 

 

 

 

 

 

 

 

 

 

 

 

 

The PACKET command issues the ATAPI packet command.

For the Byte Count Limit, specify the maximum number of bytes transferred per INTRQ in PIO mode.

When the value of the Byte Count Limit is smaller than 2048, the data is transferred in 2048-byte units.

The execution protocol of the ATAPI packet command conforms to the AT Attachment with Packet Interface - 5 (ATA/ATAPI-5) of the ANSI documents.

4-34

C156-E205-01EN

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Fujitsu MCJ3230AP manual Packet A0h, Packet command