HP 340 Series Service Manual page 66

Table 3-3. HP-HIL Devices and Power Requirements
Product
Number Device Name Milliamps
HP 35723A Touchscreen Bezel
HP 46021A ITF Key board
HP 46060A HP Mouse
HP 46080A Extension Module
HP 46081A
3 Metre Ext.
HP 46082A/B Hi/30 Metre Extension!
HP 46083A Rotary Control Knob
HP 46084A ID Module
HP 46085A Control Dials
HP 46086A Button Box
HP 46087 A/B2
"A" -Size Digitizer 2
HP 46088A/B2 "13" -Size Digitizer2
HP 46089A
4-Button Cursor
HP 46094A Quadrature Port Device
3
HP 46095A Three-Button Mouse
HP 92916A Barcode Reader
Notes:
1
Extensions have two boxes, each draws 25 rnA.
2
Includes HP 46089A 4-Button Cursor.
250
100
200
25
25
50
110
60
350
80
200
200
80
80
100
Watts
3.0
1.2
2.4
0.3
0.3
0.6
1.32
0.72
4.2
0.96
2.4
2.4
1.2
0.96
1.2
3
Port devices require 80 rnA; devices attached cannot exceed 120 rnA.
Computer-Link Interface. DIO bus architecture is interfaced to the HP-HIL microprocessor in
these circuits. They allow device input data to be used by the SPU.
Microprocessor. The HP-HIL microprocessor on the processor board provides support for link
protocol and is responsible for:
• Configuring the link.
• Processing input device data.
• Error recovery.
• Initiating commands onto the link through the Link Interface.
Link Interface. Data is exchanged between the device and the SPU through the link interface.
It accepts commands from the nlicroprocessor for transmitting and receiving messages in an
HP-HIL frame format.
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Functional Description