TYAN S7040, User Manual

Page: 81 / 124

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Flow Control
Flow Control can prevent data loss from buffer overflow. When sending data, if the
receiving buffers are full, a ‘stop’ signal can be sent to stop the data flow. Once the
buffers are empty, a ‘start’ signal can be sent to restart the flow. Hardware flow
control uses two wires to send start/stop signal.
None /
Hardware RTS/CTS
Data Bits
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7
Parity
A parity bit can be sent with the data bits to detect some transmission errors. Even:
parity bit is 0 if the num of 1’s in the data bits is even. Odd: parity bit is 0 if the num
of 1’s in the data bits is odd. Mark: parity bit is always 1. Space: parity bit is always
0. Mark and Space parity do not allow for error detection.
None /
Even / Odd / Mark / Space
Stop Bits
Stop bits indicate the end of a serial data packet. (A start bit indicates the
beginning). The standard setting is 1 stop bit. Communication with slow devices
may require more than 1 stop bit.
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2