Figure 37 Xon/Xoff Serial Port Flow Control - TransAct POSjet 1500 Programmer's Manual

Port Protocols and
Connection Specifics
Communications
Serial
Data In
Inquire
Serial
Data Out
DTR
RTS
XON or XOFF
(Not Used for
Flow Control)
RTS = Request to Send
Page 260
POSjet
Port
Data
ENQ
Data
Proc.
Commands
ENQ Response
Send
XOFF
Buffer Getting Full
Buffer Getting Empty
Send
XON
Select Key
Send

Figure 37 XON/XOFF Serial Port Flow Control

Rev M
®
1500
Data
Print
Buffer
40 - 8K
DTR = Data Terminal Ready
Programmer' s Guide
Printer Control
Software
Data
Nov-07