HP Sander 16500C manual Protocol, Data Bits

Programming Over RS-232-C

Interface Capabilities

Interface Capabilities

The baud rate, stop bits, parity, protocol, and data bits must be configured exactly the same for both the controller and the Logic Analysis System to properly communicate over the RS-232-C bus. The RS-232-C interface capabilities of the HP 16500C Logic Analysis System are listed below:

•Baud Rate: 110, 300, 600, 1200, 2400, 4800, 9600, or 19.2k

•Stop Bits: 1, 1.5, or 2

•Parity: None, Odd, or Even

•Protocol: None or XON/XOFF

•Data Bits: 8

Protocol

NONE With a three-wire interface, selecting NONE for the protocol does not allow the sending or receiving device to control data flow. No control over the data flow increases the possibility of missing data or transferring incomplete data.

With an extended hardwire interface, selecting NONE allows a hardware handshake to occur. With hardware handshake, the hardware signals control data flow.

XON/XOFF XON/XOFF stands for Transmit On/Transmit Off. With this mode, the receiver (controller or Logic Analysis System) controls

data flow and can request that the sender (Logic Analysis System or controller) stop data flow. By sending XOFF (ASCII 19) over its transmit data line, the receiver requests that the sender disables data transmission. A subsequent XON (ASCII 17) allows the sending device to resume data transmission.

Data Bits

Data bits are the number of bits sent and received per character that represent the binary code of that character. Characters consist of either 7 or 8 bits, depending on the application. The HP 16500C Logic Analysis System supports 8-bit only.

8-Bit Mode Information is usually stored in bytes (8 bits at a time). With 8-bit mode, you can send and receive data just as it is stored, without the need to convert the data.

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