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Application Notes

Building a Fragmented Message

Table C-5 Alphanumeric Message with fragmentation

PACKET

PACKET

PHASE

All Frame

COMMENT

TYPE

Counter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1st

 

ADDRESS 1

A

0

Address 1 is received

 

 

 

 

 

 

2nd

 

VECTOR 1

A

1

Vector = Alphanumeric Type

 

 

 

 

 

 

3rd

 

MESSAGE

A

1

Message Word received “C” bit = 1,

 

 

 

 

 

Message is fragmented, more expected

 

 

 

 

 

 

4th

 

STATUS

 

1

End of Frame Indication (EOF = 1)

 

 

 

 

 

 

5th

 

ADDRESS 1

B

1

Address 1 is received

 

 

 

 

 

 

6th

 

VECTOR 1

B

2

Vector = Alphanumeric Type

 

 

 

 

 

 

7th

 

MESSAGE

B

2

Message Word received “C” bit = 1,

 

 

 

 

 

Message is fragmented, more expected.

 

 

 

 

 

 

8th

 

TBD

 

1

Host writes All Frame Mode Packet to the

 

 

 

 

 

FLEXchip IC with the “DAF” bit = 1

 

 

 

 

 

 

9th

 

STATUS

 

1

End of Frame Indication (EOF = 1)

 

 

 

 

 

 

10th

 

ADDRESS 1

A

1

Address 1 is received

 

 

 

 

 

 

11th

 

VECTOR 1

A

2

Vector = Alphanumeric type

 

 

 

 

 

 

12th

 

MESSAGE

A

2

Message Word received “C” bit = 0, No

 

 

 

 

 

more fragments are expected.

 

 

 

 

 

 

13th

 

TBD

 

1

Host writes All Frame Mode Packet to the

 

 

 

 

 

FLEXchip IC with the “DAF” bit = 1

 

 

 

 

 

 

14th

 

TBD

 

0

Host writes All Frame Mode Packet to the

 

 

 

 

 

FLEXchip IC with the “DAF” bit = 1

 

 

 

 

 

 

Note:

TBD—Host Initiated Packet. The FLEXchip IC returns a packet according to Decoder-to-Host

 

Packet Descriptions on page B-22.

 

 

 

 

 

 

 

C-10

MC68175/D, Preliminary

MOTOROLA

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