GC5316_14 Datasheet, PDF (53/76 Pages) Texas Instruments – HIGH-DENSITY DIGITAL DOWNCONVERTER AND UPCONVERTER

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GC5316
SLWS154A − JANUARY 2004 − REVISED MARCH 2004
5.1.6 General Transmit Controls
These registers control the transmit output interface from the DUC 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
TYPE
E
PAGE
1C00
ADDRESS
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
BIT
WIDTH
3
DEFAULT
0
5
0
2
0
4
15
1
0
1
1
4
0
4
0
4
0
4
0
DESCRIPTION
(TESTING PURPOSES) This selects the
slice block that is generating the tst_out
data. (which DUC/DDC)
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.
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.
Enables the individual transmit output
busses 3 through 0. Disabled busses are
always held low.
Enables interleaved I/Q data when
asserted.
Enables real only outputs when asserted.
Complex data is output when cleared.
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.
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
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
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
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