GC1012B_07 Datasheet, PDF (21/30 Pages) Texas Instruments – 3.3V DIGITAL TUNER CHIP

GC1012B 3.3V DIGITAL TUNER
SLWS138B
3.7 ONE SHOT ADDRESS
The one shot pulse is generated on the OS pin by writing to address 10. This is a write-only address
and the data written to it is irrelevant.
ADDRESS 10: ONE SHOT
3.8 CHECKSUM REGISTER
This read-only register stores the checksums generated in the diagnostic mode.
ADDRESS 11: CHECKSUM
BIT
TYPE
NAME
0-7
R
CHECK[0:7]
DESCRIPTION
The 8 bit checksum. The checksum is generated as a non-linear feedback
accumulation of the BS, FS, I, and Q output bits. The current checksum is stored
in this register and the checksum generator is cleared whenever the internal sync
goes low (see SS_MUX in Section 3.2 for the modes of the internal sync).
3.9 I AND Q OUTPUT REGISTERS
These registers are used to capture output samples.
ADDRESS 12: I-Output Byte 0
BIT
TYPE
NAME
0-7
R
I[0:7]
DESCRIPTION
Least significant 8 bits of the I output.
ADDRESS 13: I-Output Byte 1
BIT
TYPE
NAME
0-7
R
I[8:15]
DESCRIPTION
Most significant 8 bits of the I output.
ADDRESS 14: Q-Output Byte 0
BIT
TYPE
NAME
0-7
R
Q[0:7]
DESCRIPTION
Least significant 8 bits of the Q output.
ADDRESS 15: Q-Output Byte 0
BIT
TYPE
NAME
0-7
R
QI[8:15]
DESCRIPTION
Most significant 8 bits of the Q output.
The user reads the I and Q outputs through these read-only registers. The captured samples can
be used for gain control, analysis, display, or diagnostics.
Texas Instruments Incorporated
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