hbcr-2210 Avago Technologies, hbcr-2210 Datasheet - Page 10

• Manufacturer Part Number: hbcr-2210
• Description: Programmable Bar Code Decode Ics - Agilent Hewlett-packard
• Manufacturer: Avago Technologies

PP0-PP7
4-56
Figure 1. Host Commands Received by Decode IC (Reader).
Handshake Timing
t
t
t
t
t
Handshake and Data Lines
Parallel Mode Handshake Timing
Handshake and Data Lines
Figure 2. Decoder IC Data Sent to Host.
Handshake Timing
t
t
t
t
t
t
PP0-PP7
CR
CB
CS
CA
CC
DO
DF
DA
DW
DH
DD
DWR
DDY
RTS
CDY
CRD
=
=
=
=
=
= Data output to bus to falling edge of data write. Max. = 6 s
= Falling edge of data write to rising edge of data ready. Min. = 0 s
= Falling edge of data ready to data output to bus. Min. = 6 s Typical Max. = 74 s
= Data hold after rising edge of data write. Max. = 4 s
= Rising edge of data write to falling edge of data ready. Min. = 0 s
= Rising edge of data ready to rising edge of data write. Max. = 8 s
Falling edge of command ready to falling edge of command read. Max. = 30 s for the first byte
of transmission from host.
Falling edge of command read to command valid. Min. = 0 s
Command valid set up to rising edge of command ready. Min. = 0 s
Rising edge of command ready to rising edge of command read. Max. = 8 s
Rising edge of command read to falling edge of command ready. Min. = 0 s
Note: The maximum can be infinite if there is no data to be transmitted. RTS can be used to
t
CR
determine when there is data. If the scanner is active or escape sequence commands
are being processed, (t
t
DO
t
CB
t
CS
t
DF
DO
= t
t
CA
t
DA
DF
) can extend by an indefinite amount.
t
DW
t
DH
t
CC
t
DD