Page 10 - DS2278_Neat

viii DS2278 Digital Scanner Product Reference Guide

Serial Response Timeout ......................................................................................................... 8-6
Retries ...................................................................................................................................... 8-6
Baud Rate, Stop Bits, Parity, Response Timeout, ACK/NAK Handshaking ............................. 8-6
Errors ....................................................................................................................................... 8-6
SSI Communication Notes ....................................................................................................... 8-7
Using Time Delay to Low Power Mode with SSI ............................................................................ 8-7
Encapsulation of RSM Commands/Responses over SSI .............................................................. 8-8
Command Structure ................................................................................................................. 8-8
Response Structure ................................................................................................................. 8-8
Example Transaction ............................................................................................................... 8-9
Setting Parameters ..................................................................................................................... 8-10
Scanning Sequence Examples .............................................................................................. 8-10
Errors While Scanning ........................................................................................................... 8-10
Simple Serial Interface Parameter Defaults ................................................................................. 8-11
SSI Host Parameters ................................................................................................................... 8-12
Select SSI Host ...................................................................................................................... 8-12
Baud Rate .............................................................................................................................. 8-12
Parity ...................................................................................................................................... 8-14
Check Parity ........................................................................................................................... 8-15
Stop Bits ................................................................................................................................. 8-15
Software Handshaking ........................................................................................................... 8-16
Host RTS Line State .............................................................................................................. 8-17
Decode Data Packet Format .................................................................................................. 8-17
Host Serial Response Timeout .............................................................................................. 8-18
Host Character Timeout ......................................................................................................... 8-19
Multipacket Option ................................................................................................................. 8-20
Interpacket Delay ................................................................................................................... 8-21
Event Reporting ........................................................................................................................... 8-22
Decode Event ......................................................................................................................... 8-22
Boot Up Event ........................................................................................................................ 8-23
Parameter Event .................................................................................................................... 8-23

Chapter 9: RS-232 Interface
Introduction .................................................................................................................................... 9-1
Setting Parameters ....................................................................................................................... 9-1
Scanning Sequence Examples ................................................................................................ 9-2
Errors While Scanning ............................................................................................................. 9-2
Connecting an RS-232 Interface .................................................................................................... 9-2
RS-232 Parameter Defaults ........................................................................................................... 9-3
RS-232 Host Parameters ............................................................................................................... 9-4
RS-232 Host Types .................................................................................................................. 9-6
Baud Rate ................................................................................................................................ 9-8
Parity ........................................................................................................................................ 9-9
Stop Bits ................................................................................................................................... 9-9
Data Bits ................................................................................................................................. 9-10
Check Receive Errors ............................................................................................................ 9-10
Hardware Handshaking .......................................................................................................... 9-11
Software Handshaking ........................................................................................................... 9-13
Host Serial Response Timeout .............................................................................................. 9-15
RTS Line State ....................................................................................................................... 9-16