Check Parity; Software Handshaking - Motorola Symbol DS3407 Reference Manual

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.
*Check Parity
(01h)

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.
•
Disable ACK/NAK Handshaking: Select this option to disable hardware handshaking. The digital scanner
neither generates nor expects ACK/NAK handshaking packets.
•
Enable ACK/NAK Handshaking: If you select this option, after transmitting data, the digital scanner expects
either an ACK or NAK response from the host. The scanner also ACKs or NAKs messages from the host.
The digital scanner waits up to the programmable Host Serial Response Time-out to receive an ACK or NAK.
If it does not receive a response in this time, it resends its data up to two times before discarding the data and
declaring a transmit error.
Disable ACK/NAK
(00h)
SSI Interface
Do Not Check Parity
(00h)
*Enable ACK/NAK
(01h)
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