HP 9020 CE Handbook page 71

7-4 9020 Peripherals
HP-IB Cables
Product Length
Number (in metres)
*92220R 0.3
10833D 0.5
10833A 1.0
*82977A 1.0
108338 2.0
*829778 2.0
10833C
4.0
8120-3448 6.0
8120-3449 8.0
* Right Angle Connector
HP 27112A General Purpose 110 (GPIO) 16-Bit Parallel
Features
• Choice of programmable operating modes (clocked or transparent) for ease of use with instru-
mentation .
• 5upports
+
5V level on all input and output signals, plus an optional
+
12V level on output
signals.
• Programmed data detection for either positive true or ground true levels.
• Independent 16-bit input and output buses and storage registers.
• Two control and two status lines.
Configuration
The normal switch settings depend on which peripheral device is connected to the GPIO. The
9885M15 Flexible Disc Drive and the 97060A Graphics Processor require the GPIO switch settings
shown in the next figure.
The switch setting functions are:
5W1
5W2
51: DIN - Negative True
52: CTL and 5T5 - Negative True
53: P5ET - Negative True
54: PDIR - Negative True
55: DOUT - Negative True
56: PEND - Negative True
57: PFLAG - Negative True (97060A)
- Positive True (9885M/5)
58: PCNTL - Negative True
51: Bidirectional Bus - Disabled
52: Internal Handshake - Disabled
53: Full/Pulse Handshake - Disabled (9885M/5)
- Enabled (97060A)
54 and 55: Data Clocked On Ready To Busy Edge Of PFLAG (Leading Edge)
09020-90035.
rev.
7
1
85