Agilent Technologies Agilent 34980A, Руководство пользователя

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Breadboard Module
13
34980A User’s Guide 329
If both bytes are targeted in the write (
SOURce
) command
, both control
lines 1 and 2 are set strobe low, both bytes’ data are written to the 16
output bits, and then both control lines are set strobe high. Valid data is
present 1.25
3
s before the control line strobe is set high. Control line 3
is then set high.
In all three cases , once the data has been written by the mainframe, the
data is kept on the data lines until another (read or write) command
changes them.
The write timing diagram is shown below.
Timing Diagrams for the Digital Read and Write Commands
The strobe timing, control line status and data timing for the read and
write commands as explained above are illustrated in the diagrams that
follow:
34959A Breadboard Module Digital I/O Timing Diagrams
Digital Channel Numbering
The two 8- bit DIO channels, numbered 001 and 002, are intended to be
used as two separate channels (bytes). However, they can be grouped
together as a single 16- bit channel (word). When these channels are
grouped, all bits in Channel 002 will be reconfigured to operate in the
same direction (input or output) as Channel 001; Channel 001 will become
the control channel, and should be used for all DIO channel configuration
commands.