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GC3021A Datasheet(PDF) 17 Page - Texas Instruments

Part No. GC3021A
Description  3.3V MIXER AND CARRIER REMOVAL CHIP
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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GC3021A Datasheet(HTML) 17 Page - Texas Instruments

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Texas Instruments Incorporated
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GC3021A 3.3V MIXER AND CARRIER REMOVAL CHIP
SLWS137A
This document contains information which may be changed at any time without notice
4.0
CONTROL REGISTERS
The chip is configured and controlled through the use of 14 sixteen bit control registers. These
registers are accessed for reading or writing using the control bus pins (CS, R/W, A[0:8], and C[0:15])
described in the previous section. The register names and their addresses are:
ADDRESS
NAME
ADDRESS
NAME
0
MODE_REG
8
OUTPUT_REGA
1
SYNC_REG0
9
OUTPUT_REGB
2
SYNC_REG1
10
OUTPUT_REGC
3
DELAY_REG
11
OUTPUT_REGD
4
COUNTER_REG0
12
SNAP_REG
5
PLL_REG
13
PHASE_REG
6
FREQ_REG0
14
ONE_SHOT
7
FREQ_REG1
15
TEST_OUT
16
DC_I_IN
17
DC_Q_IN
18
DC_I_OUT
19
DC_Q_OUT
20 to 255
unused
256 to 511
Snapshot memory (read only)
256 to 511
Phase Error memory (write only)
The DC offset registers contain two’s complement values. Only the 12 LSBs are used.
The following sections describe each of these registers. The type of each register bit is either R or
R/W indicating whether the bit is read only or read/write. All bits are active high.
Suggested default settings for using the chip in carrier removal applications is given for each
register.


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