Keysight 34959A, Руководство пользователя

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32 Keysight 34959A User’s Guide
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.
Read Command Syntax
Before reading digital data from the breadboard, you must first configure the
digital channel width as byte or word, using the
CONFigure:DIGital:WIDTh
command. The syntax is:
CONFigure:DIGital:WIDTh <width>,(@<ch_list>)
Example: If the Breadboard Module is in slot 1, the following command configures
channel 002 as a byte:
CONFigure:DIGital:WIDTh BYTE, (@1002)
data from 34959A
data to write 1.25 μ s
write to strobe 1.25 μ s
read/write
data hold till next read or write
write to strobe 1.25 μ s
strobe byte 1 and/or byte 2
strobe byte 1 or byte 2
data (8-bit) from customer
strobe byte 1 and byte 2
strobe width 1.25 μ s
strobe width 3.75 μ s
data (16-bit) from customer
strobe to data valid 1.25 μ s
data hold 0
strobe width 5 μ s
strobe to data valid 1.25 μ s
data hold 0
Data Write
Data Read (8-Bit)
Data Read (16-Bit)