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PL3307 Decoder Integration Guide
Transfer of Decode Data
The Decode Data Packet Format parameter controls how decode data is sent to the host. Set this parameter to
send the data in a DECODE_DATA packet. Clear this parameter to transmit the data as raw ASCII data.
ACK/NAK Enabled and Packeted Data
The decoder sends a DECODE_DATA message after a successful decode. The decoder waits for a
programmable time-out for a CMD_ACK response. If it does not receive the response, the decoder tries to
send two more times before issuing a host transmission error. If the decoder receives a CMD_NAK from the
host, it may attempt a retry depending on the cause field of the CMD_NAK message.
ACK/NAK Enabled and Unpacketed ASCII Data
Even though the ACK/NAK handshaking is enabled, no handshaking occurs because the handshaking applies
only to packeted data. In this example the
packeted_decode
parameter is disabled.
ACK/NAK Disabled and Packeted DECODE_DATA
In this example ACK/NAK does not occur even though
packeted_decode
is enabled because the ACK/NAK
handshaking parameter is disabled.
NOTE
When transmitting decode data as raw ASCII data, ACK/NAK handshaking does not apply regardless of
the state of the ACK/NAK handshaking parameter.
Decoder
Data is captured
by decoder
Host
(1)
DECODE_DATA
(2)
CMD_ACK
message sent
Decoder
Data is captured
by decoder
Host
ASCII data
Decoder
Data is captured
by decoder
Host
(1)
DECODE_DATA
message sent
Summary of Contents for PL3307
Page 1: ...PL3307 DECODER INTEGRATION GUIDE ...
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Page 3: ...PL3307 INTEGRATION GUIDE 72E 149624 01 Revision 11 September 2011 ...
Page 6: ...iv PL3300 Decoder Integration Guide ...
Page 15: ...Table of Contents xiii Appendix E ASCII Character Sets Index ...
Page 16: ...xiv PL3307 Decoder Integration Guide ...
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Page 44: ...3 4 PL3307 Decoder Integration Guide Figure 3 3 Imager Engine to PL3307 21 Pin Flex ...
Page 47: ...Accessories 3 7 Figure 3 6 PL3307 30 Pin Host Connector Molex 52437 Series ...
Page 49: ...Accessories 3 9 Figure 3 8 PL3300 microUSB Host Connector Molex 47346 Series ...
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Page 299: ...APPENDIX C SAMPLE BAR CODES Code 39 UPC EAN UPC A 100 123ABC 0 12345 67890 5 ...
Page 302: ...C 4 PL3307 Decoder Integration Guide QR Code US Postnet UK Postal ...
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