CT2578-12-XT-P119 参数 Datasheet PDF下载

MESSAGE FORMATS

BC TO RT TRANSFER

DATA BUS

NVCR

NHDR

NDATA

NCMDSTRB

NDATAST

T0-T15

COMMAND

DATA

DATA

DATA

STATUS

1

1.

2.

3.

4.

5.

6.

7.

2

3

4 5 6 7

Valid command word received, contents available on T0-T15 for illegalization purposes.

First valid data word (1760 header word) received, contents available on T0-T15 and stored in 32 word data memory.

Second valid data word received, contents available on T0-T15 and stored in 32 word data memory.

Last valid data word received, contents available on T0-T15 and stored in 32 word data memory. Status bits must be valid within 250nS.

Status register contents transferred to transmit buffer.

NCMDSTRB indicates valid message received, command word available on T0-T15.

Data words transferred from 32 word data memory to subsystem at 500 nS per word.

RT TO BC TRANSFER

DATA BUS

NVCR

NCMDSTRB

NSSTRB

T0-T15

COMMAND

STATUS

DATA

DATA

DATA

1 2 3 4

1.

2.

3.

4.

Valid command word received, contents available on T0-T15 for illegalization purposes. Status must be valid within 600 nS.

Status register contents transferred to transmit buffer.

NCMDSTRB indicates valid message received, command word available on T0-T15.

Data words transferred from subsystem to 32 word data memory at 1 uS per word.

RT TO RT TRANSFER

(RECEIVING TERMINAL)

DATA BUS

NVCR

NHDR

NDATA

NCMDSTRB

NDATAST

T0-T15

REC CMD TRAN CMD

STATUS

DATA

DATA

STATUS

1

SCDCT2578 REV B 3/11/98

2

3

4

4

5 6 7 8