TX Top Register Map
632
SBAU337 – May 2020
Copyright © 2020, Texas Instruments Incorporated
Serial Interface Register Maps
Table 2-1220. Register 47 Field Descriptions
Bit
Field
Type
Reset
Description
0-0
TX_DUC_MIXER1
_MODE_CONFIG2
R/W
0h
Mixer1 Mode Configuration2
Value depends on whether mixer1 is engaged at all, and if
engaged, at what sampling rate in relation to the TX Digital
clock.
0: Mixer1 engaged, and at a sampling rate less than or equal
to half the TX digital clock
1: Mixer1 bypassed, or engaged at a sampling rate greater
than half the TX digital clock
The correct/optimal value to use is automatically determined if
System Configuration Macros are used. It is highly
recommended that the System Configuration Macros be used.
2.12.6 Register 4Ch (offset = 4Ch) [reset = Ch]
Figure 2-1209. Register 4Ch
7
6
5
4
3
2
1
0
TX_DUC_INTERPOLATOR2_CONFIG
R/W-Ch
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-1221. Register 4C Field Descriptions
Bit
Field
Type
Reset
Description
3-0
TX_DUC_INTERP
OLATOR2_CONFI
G
R/W
Ch
Interpolator2 Configuration. The value to the programmed is a
function of the interpolation2 interpolation factor as well as the
percentage bandwidth (at the interpolator2 input sampling
rate) that is to be preserved by the interpolation2 interpolation
filters. The correct/optimal value to use is automatically
determined if System Configuration Macros are used. Not all
interpolation2 interpolation factors are valid for all DAC rates
and/or DAC/DIG clock ratios, so it is highly recommended that
the System Configuration Macros be used.
02: Interpolation2 factor = 6 at 80% BW
03: Interpolation2 factor = 3 at 40% BW
06: Interpolation2 factor = 3 at 80% BW
07: Interpolation2 factor = 1.5 at 40% BW
08: Interpolation2 factor = 8 at 80% BW
09: Interpolation2 factor = 4 at 40% BW
11: Interpolation2 factor = 2 at 20% BW
12: Interpolation2 factor = 4 at 80% BW
13: Interpolation2 factor = 2 at 40% BW
14: Interpolation2 factor = 2 at 80% BW
The System Configuration Macros automatically partition the
overall required interpolation factor power optimally between
the interpolation1 and interpolation2 sections, for single and
dual band scenarios, taking into account multiple factors. It is
highly recommended that the System Configuration Macros be
used.
2.12.7 Register 60h (offset = 60h) [reset = 0h]
Figure 2-1210. Register 60h
7
6
5
4
3
2
1
0
TX_DUC_ASYNC_FIFO_CONFIG0
R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset