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[Reference]
Reference
Communications Timing
RS232C Communications
T3 T3T4
Request for transmission
Permission to transmit
ACK/NAK
Data block
Request for transmission
Permission to transmit ACK/NAK
Data block
T5 T4
T3 T3T5 T4 T5
Code
T3
T4
T5
Name
Continuous inter-character time
Driver response time
Host response time
Minimum
Stop bit length
4ms
2ms
Maximum
Protocol parameter T1
Protocol parameter T2
Protocol parameter T2
Host Driver
Driver Host
Host Driver
Driver Host
<Caution>
The time represents a period of time from stop bit rising edge.