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The Message and Register Interfaces
The HP E1429 digitizer can be programmed as a message-based device or
as a register-based device (Appendix C). When the digitizer functions as a
message-based device, the processor within the message interface (Figure
3-1) converts SCPI (ASCII) command strings to register reads and writes
through the register interface. When the digitizer functions as a
register-based device, command opcodes are written directly to the digitizer
registers from the register interface.
Digitizer Command
Paths
Figure 3-2 shows the command paths used when programming the digitizer
as a message-based device or as a register-based device.
Figure 3-2. HP E1429 Digitizer Command Paths
Chapter 3 Understandin
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the HP E1429 Di
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