Rohde & Schwarz RTM2032 - UART;RS-232 Interface (Option R&S RTM-K2); The UART; RS232 Interface

Protocol Analysis
R&S
®
RTM20xx
175User Manual 1317.4726.02 ─ 01
Remote commands:
● BUS<b>:I2C:FCOunt? on page 392
BUS<b>:I2C:FRAMe<n>:DATA? on page 392
BUS<b>:I2C:FRAMe<n>:STATus? on page 393
BUS<b>:I2C:FRAMe<n>:STARt? on page 393
BUS<b>:I2C:FRAMe<n>:STOP? on page 394
BUS<b>:I2C:FRAMe<n>:AACCess? on page 394
BUS<b>:I2C:FRAMe<n>:ACCess? on page 394
BUS<b>:I2C:FRAMe<n>:ACOMplete? on page 395
BUS<b>:I2C:FRAMe<n>:ADBStart? on page 395
BUS<b>:I2C:FRAMe<n>:ADDRess? on page 395
BUS<b>:I2C:FRAMe<n>:ADEVice? on page 396
BUS<b>:I2C:FRAMe<n>:AMODe? on page 396
BUS<b>:I2C:FRAMe<n>:ASTart? on page 396
BUS<b>:I2C:FRAMe<n>:BCOunt? on page 397
BUS<b>:I2C:FRAMe<n>:BYTE<o>:ACCess? on page 397
BUS<b>:I2C:FRAMe<n>:BYTE<o>:ACKStart? on page 397
BUS<b>:I2C:FRAMe<n>:BYTE<o>:COMPlete? on page 398
BUS<b>:I2C:FRAMe<n>:BYTE<o>:STARt? on page 398
BUS<b>:I2C:FRAMe<n>:BYTE<o>:VALue? on page 398
11.4 UART/RS-232 Interface (Option R&S RTM-K2)
11.4.1 The UART / RS232 Interface
The Universal Asynchronous Receiver/Transmitter UART converts a word of data into
serial data, and vice versa. It is the base of many serial protocols like of RS-232. The
UART uses only one line, or two lines for transmitter and receiver.
Data transfer
The data is transmitted in symbols, also referred to as words or characters. Each symbol
consists of a start bit, several data bits, an optional parity bit, and one or more stop bits.
Several symbols can form a frame, or package. The end of a frame is marked by a pause
between two symbols.
[Data8]
[Parity]
Stop[Data7][Data6][Data5]
Data4Data3Data2Data1Data0
Start
Fig. 11-9: Bit order in a UART word (symbol)
●
The start bit is a logic 0.
●
The stop bits and the idle state are always logic 1.
UART/RS-232 Interface (Option R&S RTM-K2)