GC5318 Datasheet, PDF (32/45 Pages) Texas Instruments – HIGH-DENSITY DIGITAL UPCONVERTER

GC5318
HIGH-DENSITY DIGITAL UPCONVERTER
SLWS187 – JULY 2006
www.ti.com
4.1.5 General Controls
These registers control the transmit output interface from the channels.
Variable Name
tst_sel_slice
tst_rate
interf_round
interf_ena
interf_interl
interf_real
interf_scale_3
interf_scale_2
interf_scale_1
interf_scale_0
comp_pmeter0_count_lsb
comp_pmeter0_count_msb
comp_pmeter0_sync_delay
Type
E
Page Address
1C00
00
LSB
Position
13
E 1C00
05
11
D 1C00
00
8
D 1C00
00
4
U 1C00
00
1
U 1C00
00
0
U 1C00
01
12
U 1C00
01
8
U 1C00
01
4
U 1C00
01
0
D 1C00
02
0
D 1C00
03
0
D 1C00
03
7
Bit
Width
3
5
2
4
1
1
4
4
4
4
16
5
9
Default
Description
0 (TESTING PURPOSES) This value selects the
slice block that is generating the tst_out data.
(Which DUC)
0 The value here controls the output clock rate on
the clk_tst pin. A value of 0 gives a full-rate
output clock (txclk rate), a 1 gives half-rate
output clock, a 3 gives 1/4th rate output clock,
and so on. The number of txclk cycles for which
the clk_tst signal is high + low = 1 + tst_rate.
0 Controls round point on the transmit output data;
{00 = 18b, 01 = 16b, 10 = 14b, 11 = 12b}.
Rounded output data is MSB justified. For
example, a 12b round point causes the output
data to be presented on the output pins (17:6),
and the output pins (5:0) to be held low.
15 Enables the individual transmit output busses 3
through 0. Disabled busses are always held low.
0 Enables interleaved I/Q data when asserted.
1 Enables real only outputs when asserted.
Complex data is output when cleared.
0 Selects the scaling between the sumchain
output signals and the transmit output pins and
transmit composite power meters. Appropriate
limiting and rounding is performed as required
by the programmed round point. Gain =
2^{(interf_scale)}. For sumchain 3.
0 Selects the scaling between the sumchain
output signals and the transmit output pins and
transmit composite power meters. Appropriate
limiting and rounding is performed as required
by the programmed round point. Gain =
2^{(interf_scale)}. For sumchain 2
0 Selects the scaling between the sumchain
output signals and the transmit output pins and
transmit composite power meters. Appropriate
limiting and rounding is performed as required
by the programmed round point. Gain =
2^{(interf_scale)}. For sumchain 1
0 Selects the scaling between the sumchain
output signals and the transmit output pins and
transmit composite power meters. Appropriate
limiting and rounding is performed as required
by the programmed round point. Gain =
2^{(interf_scale)}. For sumchain 0
0 This is the number of sample sets to accumulate
for a power measurement. Ia and Qa (signal)
are each squared and accumulated. Each pair
of I and Q are equal to one integration count.
The accumulation interval is initiated when the
sync is asserted and the programmed
sync_delay has expired or when the interval
start time is reached. When the integration count
is reached, the accumulated powers are made
available for MPU access and an interrupt is
generated. Bits 0–15
0 Bits 16–20 of the number of sample sets to
accumulate for a power measurement. (Used in
conjunction with the previous variable.)
0 Programmable start delay from sync, in eight
output sample units.
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GC5318 Programming