Aaeon ICS-6270, Руководство пользователя

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Chapter 3 – AMI BIOS Setup 58
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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 re-start the flow. Hardware flow
control uses two wires to send start/stop signals.
Data Bits
7
8
Data Bits
Parity
None
Even
Odd
Mark
Space
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 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.
Stop Bits
1
2
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.