HP 9030 CE Handbook page 53

9030/40 Peripherals 7-7
HP 27128A Asynchronous Serial Interface (ASI)
Features
• Switch selectable and software programmable baud rate; up to 19,200 bits per second.
• EIA RS-232C, CCITT V.24, and CCITT V.28 compatibility.
• Asynchronous transmission in simplex, full duplex, and echoplex mode.
• Programmable format control and built-in framing error, overrun error, and parity checking.
• Break detection, support for X-ON/X-OFF and terminal emulation mode.
Configuration
The normal switch settings are:
S1: Single Text Termination;
S2: Hard wired;
S3: No Parity;
S4: Bits Per Character;
S5 to S8: Baud Rate;
UP - Single Text T ermination. (Typical)
Down - Not Single Text Termination.
Up - Device Directly Connected.
Down - Device Not Directly Connected. (Modem use)
Up - No Parity. (Typical)
Down - Odd Parity.
Up - 8 Bits Per Character. (Typical)
Down - 7 Bits Per Character.
(See table)
ASI Baud Rate Switches
Switches
S5 S6 S7
S8 BAUD Rate
Down Down Down
Down
50
Down Down Down
Up
75
Down
Down
Up
Down
110
Down Down
Up
Up
134.5
Down
Up
Down Down
150
Down
Up
Down
Up
300
Down
Up Up
Down
600
Down
Up Up
Up
900
Up
Down Down Down
*1200
Up
Down Down
Up
1800
Up
Down
Up
Down
2400
Up
Down
Up Up
3600
Up Up
Down Down
4800
Up Up
Down
Up
7200
Up Up Up
Down
**9600
Up
Up
Up Up
19200
* Typical modem
**rypical direct connection application