HBCR-1611 Agilent(Hewlett-Packard), HBCR-1611 Datasheet - Page 7

• Manufacturer Part Number: HBCR-1611
• Description: Single Chip Bar Code Decode IC
• Manufacturer: Agilent(Hewlett-Packard)

DWR
CRD
Parallel I/O Handshake
CDY
DATA TRANSMITTED FROM THE IC
DDY
COMMANDS RECEIVED BY THE IC
D
RTS
D
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1-8
1
1
2
2
3
3
4
4
5
5
6
6
7
7
PROTOCOL
PROTOCOL
1. THE IC INDICATES DATA IS READY
2. THE HOST SIGNALS THE IC THAT IT IS
3. THE IC OUTPUTS DATA ONTO THE BUS.
4. THE IC INDICATES THAT THE DATA
5. THE HOST ACKNOWLEDGES THAT THE
6. THE IC INDICATES THE END OF THE
7. THE IC REMOVES DATA FROM THE BUS.
1. THE HOST INDICATES THAT A COMMAND
2. THE IC INDICATES THAT IT IS READY FOR
3. THE HOST OUTPUTS THE COMMAND
4. THE HOST INDICATES THAT THE DATA
5. THE IC READS THE COMMAND FROM
6. THE IC INDICATES THAT THE COMMAND
7. THE HOST REMOVES THE DATA FROM
TO BE TRANSMITTED BY LOWERING
RTS; RTS STAYS LOW UNTIL THE LAST
BYTE HAS BEEN TRANSMITTED.
READY FOR DATA BY LOWERING DDY.
IS STABLE BY LOWERING DWR.
DATA IS RECEIVED BY RAISING DDY.
OUTPUT CYCLE BY RAISING DWR.
IS PENDING BY LOWERING CDY.
A COMMAND BY LOWERING CRD.
ONTO THE DATA BUS.
IS STABLE BY RAISING CDY.
THE BUS.
WAS ACCEPTED BY RAISING CRD.
THE DATA BUS.
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