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5
5
REFERENCES
5.1
RS232 PARAMETERS
5.1.1
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.
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.
138
RTS
TX
CTS
RTS/CTS handshaking
Transmitted data
TX
RX
XON/XOFF handshaking
Transmitted data
Host busy
Transmitted data
XOFF
XON
Host busy
Host ready
Transmitted data
DRAGON™
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