Check Parity; Software Handshaking - Motorola Symbol MS4404 Integration Manual

8 - 14 Symbol MS4404/MS4407 Integration Guide

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.
*Do Not Check 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: When this option is selected, the decoder neither generates nor expects
ACK/NAK handshaking packets.
•
Enable ACK/NAK Handshaking: When this option is selected, after transmitting data, the decoder expects
either an ACK or NAK response from the host. The decoder also ACKs or NAKs messages from the host.
The decoder waits up to the programmable Host Serial Response Time-out to receive an ACK or NAK. If the
decoder 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.
Disable ACK/NAK
(00h)
(00h)
Check Parity
(01h)
*Enable ACK/NAK
(01h)