GC5318 Datasheet, PDF (28/45 Pages) Texas Instruments – HIGH-DENSITY DIGITAL UPCONVERTER

GC5318
HIGH-DENSITY DIGITAL UPCONVERTER
SLWS187 – JULY 2006
www.ti.com
Table 3-2 and Table 3-3 summarize the blocks that have functions which can be synchronized using the
above eight sync options:
Table 3-2. Common Syncs
VARIABLE
ssel_comp_pmeter
ssel_duc_counter
ssel_duc_serp
ssel_duc_gain
ssel_duc_pilot
ssel_duc_tadj
ssel_duc_pmeter
DESCRIPTION
Initializes the xmit composite power meter
Initializes the xmit common sync counter
Initializes the xmit serial interface
Updates the gain register
Initializes the xmit pilot generator and updates the pilot gain
Updates the delay adjust register
Initializes the xmit channel power meter
VARIABLE
ssel_duc_nco
ssel_duc_freq
ssel_duc_phase
ssel_duc_dither
Table 3-3. Channel Syncs
DESCRIPTION
Resets the NCO accumulator
Updates the NCO frequency registers
Updates the NCO phase register
Resets the NCO dither
3.5 Initialization
Chip initialization procedures are available from Texas Instruments.
3.6 GC5318 Board Diagnostics
The GC5318 contains built-in test features that can be used to confirm that the chip is operating correctly
and to help users debug their boards and systems that contain the GC5318.
The diagnostic and board test procedures can be downloaded from the web at www.ti.com as the GC5318
Diagnostics Designer's Kit.
4 GC5318 Programming
The GC5318 contains over 3,000 control and coefficient registers, many of which must be initialized in
order to fully configure the chip. Rather than program each of these registers individually, Texas
Instruments supplies a configuration program called cmd5318 that accepts top-level configuration
information for the chip and then generates the full register map and control writes required to program the
chip.
The cmd5318 program, its user's guide, and example configuration files can be downloaded from the web
at www.ti.com as the GC5318 Configuration Designer's Kit.
The configuration controls have been defined in the functional description of each section of the chip. The
following tables summarize these controls and identify which register and which bits within the registers
they occupy.
Each control register table has a column identifying whether the variable must be specified by the user in
cmd5318 (U), is typically left at the default value and does not need to be specified (D), is computed by
cmd5318 and should not be set (C), or is for expert use only (E).
Tables are also included that show the top level page mapping for the chip controls, the status and
measurement result registers, and additional controls that are used with the GC101/GC5318 DIMM
evaluation platform.
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GC5318 Programming