Rainbow-electronics DS1957 Bedienungsanleitung PDF herunterladen (Seite 7)

DS1957

7 of 25

DATA TRANSFER AND CONTROL FUNCTION FLOW CHART Figure 4

MASTER TX DATA TRANSFER OR

CONTROL FUNCTION COMMAND

0FH

WRITE IPR

AAH

READ IPR

BUS MASTER TX

LENGTH BYTE

BUS MASTER TX

DATA BYTE

LAST BYTE

DS1957 INCREMENTS

IPR ADDRESS

BUS MASTER RX

CRC 16 OF COMMAND,

LENGTH BYTE, DATA

BUS MASTER

TX RESET

TO DATA TRANSFER AND

CONTROL FUNCTION

FROM ROM FUNCTION FLOW CHART

1) TO BE TRANSMITTED OR RECEIVED AT OVERDRIVE SPEED IF OD=1

2) RESET PULSE TO BE TRANSMITTED AT OVERDRIVE SPEED IF OD=1;

RESET PULSE TO BE TRANSMITTED AT REGULAR SPEED IF OD=0

OR IF THE DS1957 IS TO BE RESET FROM OVERDRIVE SPEED TO

REGULAR SPEED

BUS MASTER TX

LENGTH BYTE

BUS MASTER RX

DATA BYTE

LAST BYTE

DS1957 INCREMENTS

IPR ADDRESS

BUS MASTER RX

CRC 16 OF COMMAND,

LENGTH BYTE, DATA

BUS MASTER

TX RESET

FLOW CHART PART 2

LEGEND:

DECISION MADE

BY THE MASTER

DECISION MADE

BY DS1957

TO DATA TRANSFER AND

CONTROL FUNCTION

FLOW CHART PART 2

SEE COMMAND

DESCRIPTION

FOR DETAILS

BUS MASTER

RX 1’s

BUS MASTER

TX RESET

1 2 3 4 5 6 7 8 9 10 11 12 ... 24 25

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