hsp50016 Intersil Corporation, hsp50016 Datasheet - Page 5
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hsp50016
Manufacturer Part Number
hsp50016
Description
Digital Down Converter
Manufacturer
Intersil Corporation
Datasheet
1.HSP50016.pdf
(19 pages)
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output data and writes it into the output file as two’s
complement complex or real data. The configuration of the I,
Q, IQCLK and IQSTB pins is transparent to the user,
provided that none of the pins are three-stated and the DDC
Control Word fields Real Output, HDF Decimation Rate,
Number of Output Bits, I followed by Q and IQCLK rate are
compatible with each other. All valid output modes are
supported.
File based I/O is activated by using the space bar to toggle
the “check mark” symbol in the window proceeding the input
and output file identifiers in the control panel's file I/O
Section. If either file input or output is activated, the
respective file name must be entered in the window to the
right of the file identifier. File input or output may be disabled
at any time by toggling the respective “check mark”.
Note: File I/O is only valid when either the ‘Manual CLK’
or ‘Port CLK’ clocking modes are selected and it is
disabled if other clocking modes are specified.
Input and output data files are ASCII files whose format is
described in Appendix A. There is no limitation to the input
and output file size. Care must be taken if file output is
specified since data is collected in the file until file output is
deactivated or the DDCCTRL Program is exited.
TAP I/O files are similar, except that the TAP is available
regardless of the CLK setting. The format for the TAP input
and output files is given in Appendix B.
HSP50016 Data Inputs
The data window to the left of the HSP50016 icon is used to
specify hexadecimal values which drive the DDC's data
inputs DATA0-15. Data is entered into this window in
hexadecimal format starting with the most significant digit.
The contents of a particular data window may be edited by
following the window editing instructions in Appendix C.
If file input is selected, the data input is driven with data from
the specified file. On each clock the data window is updated
with the data sample down loaded from the file. In this mode
the data input window may not be manually updated.
HSP50016 Data I&Q Outputs
There are 32 bits available at P2. The control software for
the evaluation board performs a serial read via the PC Port.
Control Signals
The control signal portion of the control panel is used to
define the state of the DDC control signals RESET and
IQSTRT. The logical state of a control signal is set by using
the space bar to toggle the signal state in the window
preceding the specified control signal. When the evaluation
board is in Port CLK mode and RESET is set either low or
high, the DDC is automatically clocked five times. See the
HSP50016 Data Sheet for a complete description of the
control signals. RESET must be toggled low and high
once after power up. The software DOES NOT do this
automatically.
3-5
HSP50016-EV
Control Words
In the lower left hand corner of the control panel is a data
window which contains the hexadecimal values loaded into
the HSP50016's eight control words. The contents of a
particular control word may be updated by moving the cursor
to the data window which is to be modified, selecting the
control word by pressing the space bar (which moves the
check mark to the desired control word) and depressing the
F4 key. A submenu pops up which parses that control word
into its various fields so that they may be examined or
modified individually.
The value entered into the data window is down loaded to
the HSP50016 and the submenu disappears when the user
depresses the F2 key. Leaving the window via the <Esc> key
ignores any changes made and returns to the main control
panel screen. If the update bit has been set, the new values
will update the configuration of the DDC and this will be
reflected in the submenu screen.
Note that all values displayed in this window are the last
values written to the control words, as opposed to
having been read from the DDC itself.
Help
Help windows are provided as a source of information for
control panel usage. The help window is activated by the F1
function key, and contains information based on the window
which is currently active.
Command Line Interface
As an alternative to the control panel, a command line
interface is provided which allows the user to control the
HSP50016-EV by issuing commands from the DOS prompt.
The commands perform basic I/O and configuration
functions by up or down loading data to the HSP50016
through the HSP50016-EV. The Command Line Program
has the following usage:
The Command specifies the action to be taken, and the
Arguments (ARG1, ARG2) represent additional data
required by the command. For example, to load Control
Word 1 with a value of 200000005(HEX) and set the update
bit, the user would type:
A summary of the command set is given in Table 2.
When several commands are to be entered consecutively,
the user may initiate the interactive command mode by
entering:
All commands are then entered as before, except that
control does not return to DOS between commands, and it is
not necessary to enter DDCCMD for each command. Note
DDCCMD [Command] [ARG 1] [ARG 2] [ARG 3]
DDCCMD WCW 1 1 200000005 <Enter>
DDCCMD <Enter>