Symbol DS6707-DP20411ZZR - Symbol Digital Scanner DS6707-DP, Product Reference Manual

Page: 99 / 402

SSI Interface 6 - 7
Check Parity
Parameter # 97h
Select whether or not to check the parity of received characters. Use the Parity parameter to select the type of
parity.
Software Handshaking
Parameter # 9Fh
This parameter offers control of the data transmission process in addition to that offered by hardware handshaking.
Hardware handshaking is always enabled and cannot be disabled by the user.
• Disable ACK/NAK Handshaking : If you select this option, the decoder neither generates nor expects
ACK/NAK handshaking packets.
• Enable ACK/NAK Handshaking : If you select this option, after transmitting data, the digital imager scanner
expects either an ACK or NAK response from the host. The digital imager scanner also ACKs or NAKs
messages from the host.
The digital imager scanner waits up to the programmable Host Serial Response Time-out to receive an ACK
or NAK. If the scanner does not get a response in this time, it resends its data up to two times before
discarding the data and declaring a transmit error.
*
Check Parity
(01h)
Do Not Check Parity
(00h)
Disable ACK/NAK
(00h)
*
Enable ACK/NAK
(01h)