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Datalogic PowerScan M8500 Product Reference Manual: References; Rs-232 Parameters; Handshaking

Datalogic powerscan industrial handheld area imager bar code reader with datalogic’s star cordless system.
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RS-232 Parameters

Handshaking

Hardware handshaking: (RTS/CTS)
The RTS line is activated by the decoder before transmitting a character. Transmission is
possible only if the CTS line (controlled by the Host) is active.
Figure 23. RTS/CTS handshaking
Signals at
EIA levels
Software handshaking: (XON/XOFF)
During transmission, if the Host sends the XOFF character (13 Hex), the decoder interrupts
the transmission with a maximum delay of one character and only resumes when the XON
character (11 Hex) is received.
Figure 24
TX
RX
Product Reference Guide
RTS
TX
Transmitted data
CTS
XON/XOFF handshaking
.
Transmitted data
Transmitted data
XOFF
XON
Host busy
Host ready
Transmitted data
Host busy
Chapter 5

References

155

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