GC5318 Datasheet, PDF (35/45 Pages) Texas Instruments – HIGH-DENSITY DIGITAL UPCONVERTER

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GC5318
HIGH-DENSITY DIGITAL UPCONVERTER
SLWS187 – JULY 2006
Variable Name
ssel_tadj_coarse
ssel_gain
gainfora
gainforb
ssel_nco
ssel_dither
ssel_freq
ssel_phase
cic_scale_a
cic_scale_b
cic_interp_decim
cic_m2_ena_a
cic_m2_ena_b
cic_auto_flush_dis
cic_flush_test
cic_flush_clear
tadj_offset_coarse_a
tadj_offset_coarse_b
tadj_offset_fine_a
tadj_offset_fine_b
tadj_interp_decim
Address
Type Page (HEX)
U 0120 0C
U 0120 0C
U 0100 0C
U 0100 0D
U 0120 0D
U 0120 0D
U 0120 0D
U 0120 0D
U 0100 0E
U 0100 0E
U 0100 0E
D 0100 0F
D 0100 0F
E 0100 10
E 0100 10
E 0100 10
D 0100
11
D 0100
11
D 0100
12
D 0100
12
U 0100
12
LSB
Position
8
4
0
0
12
8
4
0
11
6
0
10
4
12
8
4
10
4
13
10
7
Bit
Width
3
3
16
16
3
3
3
3
5
5
5
6
6
4
4
4
6
6
3
3
3
Default
Description
0 Selects the sync source for the course time adjust delay
selection.
0 Selects the sync source for the DUC gain register.
8192
This is the unsigned gain that is multiplied with the CDMA
channel A or UMTS channel input signal. The gain multiply
is calculated as gainfora/8192.
8192 This is the unsigned gain that is multiplied with the CDMA
channel B input signal.
0 Selects the sync source for the NCO accumulator reset.
0 Selects the sync source for the NCO phase dither
generator reset.
0 Selects the sync source for the NCO frequency register.
0 Selects the sync source for the NCO phase offset register.
0 This sets the gain shift at the output of the CDMA A
channel (or UMTS channel) CIC. 0x00 is no shift; each
increment by 1 increases the signal amplitude by 2X.
0 This sets the gain shift at the output of the CDMA B
channel CIC. 0x00 is no shift; each increment by 1
increases the signal amplitude by 2X.
24 Sets the CIC interpolation, where interpolation is
cic_interp_decim + 1 in the digital up converters.
0 Programs the CDMA A channel (or UMTS channel) CIC fir
sections M value to 2 when set, 1 when cleared.
cic_m2_ena_a(0) controls the M value for the first comb
section and cic_m2_ena_a(5) controls the M value for the
last comb section.
0 Programs the CDMA B channel CIC fir sections M value to
2 when set, 1 when cleared. cic_m2_ena_b(0) controls the
M value for the first comb section and cic_m2_ena_b(5)
controls the M value for the last comb section.
0 Disables the automatic flush feature in the CIC
accumulators.
0 Forces an overflow detection in the CIC only on a rising
edge of this bit, therefore it must be programmed to '0' and
then back to `1' for the edge to occur.
0 Clears an overflow error manually when set, again only on
a rising edge does this occur.
0 This is part of the time delay adjust. This is the coarse
offset and is really an offset from the write address in the
delay ram. This value affects the A channel if CDMA mode
is being used, or the UMTS channel. Each LSB is one
more offset between input to the course delay block and
the output of the course block.
0 This is part of the time delay adjust. This is the coarse
offset and is really an offset from the write address in the
delay ram. This value affects the B channel if CDMA mode
is being used. Each LSB is one more offset between input
to the course delay block and the output of the course
block.
0 This is part of the time delay adjust. This is the fine adjust
value. It adjusts the time delay at the clock rate. This value
affects the A channel if CDMA mode is being used, or the
UMTS channel.
0 This is part of the time delay adjust. This is the fine adjust
value. It adjusts the time delay at the clock rate. This value
affects the B channel if CDMA mode is being used.
1 This is the decimation or interpolation value for the fine
time adjust block. Decimation or interpolation can be from 1
to 8. This value affects both the A and B channels if CDMA
mode is being used, or the UMTS channel.
GC5318 Programming
35