FIGURE 2-3 JUMPER SELECTIONS
2.10.2 ASCII FORMAT
The word format: data bits per character, number of stop bits, and parity is set with the top 4 jumpers
on P3. These positions are silk screened with mnemonics: 7B for 7 bits, 2S for 2 Stop bits, EV for
Even parity, and ON for parity On. The table below lists the jumpers in the positions that they appear
on the board and explains their functions further.
JUMPER
LABEL PARAMETER ON OFF
7B Data Bits per Character 7 8
2S Stop Bits per Character** 2 1
EV Parity Sense (if ON)* Even Odd
ON Parity Generate and Receive On Off
* If Parity is Off, no parity is generated or checked regardless of the position of the Parity Sense
jumper.
** If Parity is ON and 8 bits per character is selected, one stop bit is transmitted regardless of the Stop
Bit jumper.
2.10.3 DATA TRANSFER RATES, BAUD
The Interface's baud rate is set with the bottom 3 jumpers of P3. Baud transfer selections range from
110-19200. The Interface requires up to 800 microseconds to process received characters;