GC5316 datasheet(55/75 Pages) TI

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GC5316

SLWS154A − JANUARY 2004 − REVISED MARCH 2004

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duc_counter_width

1C00

Sets the width of the counter generated

sync pulse in TX clock cycles, from 1 to

256. The width of this pulse must be long

enough to be captured by the slowest

block to use the DUC counter sync.

ssel_comp_pmeter_0

1C00

Selects the sync source for composite

power meter 0.

ssel_comp_pmeter_1

1C00

Selects the sync source for composite

power meter 1.

ssel_comp_pmeter_2

1C00

Selects the sync source for composite

power meter 2.

ssel_comp_pmeter_3

1C00

Selects the sync source for composite

power meter 3.

ssel_txsync_out

1C00

Selects the sync source for the

TXSYNC_OUT pin.

5.1.7 DDC or DUC Channel Controls

These controls are used by both the DDC or DUC channels. These follow either the ddc <channel_number> or the

duc <channel_number> keywords in the cmd5316 configuration file.

VARIABLE NAME

TYPE

PAGE

ADDRESS

LSB

POSITION

BIT

WIDTH

DEFAULT

DESCRIPTION

cdma_mode

0100

When asserted the block is in the dual channel

CDMA2000 mode.

crastarttap_pfir

0100

These bits define the number of taps that PFIR

uses for the filtering. Another way of looking at

these bits is that this value is the location in the

RAM of the center tap. DUC PFIR: (2 x

crastarttap_pfir) +1, DDC PFIR:

4(crastarttap_pfir+1), DDC PFIR long mode:

8(crastarttap_pfir+1). Note: crastarttap_pfir must

be odd for a DUC

crastarttap_cfir

0100

These bits define the number of taps that CFIR

uses for the filtering. DUC CFIR: (2 x

crastarttap_cfir) +1, DDC CFIR:

2(crastarttap_cfir+1). Note: crastarttap_cfir must

be odd for a DUC

pfir_gain

0100

This is the gain for the PFIR. The range is from

2e−19 to 2e−12 for the receive PFIR. (“000” =

2e−19 and “111” = 2e−12) For the transmit PFIR

however, only the LSB of the word is used and it

selects either 2e−18 when ‘0’ or 2e−17 when ‘1’.

cfir_gain

0100

This is the gain for the CFIR. 0= 2e−19, 1=

2e−18.

cic_scale_a

0100

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.

cic_scale_b

0100

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.

cic_interp_decim

0100

Sets the CIC interpolation, where interpolation is

cic_interp_decim + 1 in the digital up converters.

Sets the CIC decimation, where decimation is

cic_interp_decim + 1 in the digital down

converters.

GC5316 Datasheet(PDF) 55 Page - Texas Instruments

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