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| 型號(hào)： | GC1012A-CQ |
| 廠(chǎng)商： | Texas Instruments, Inc. |
| 英文描述： | DIGITAL TUNER CHIP |
| 中文描述： | 數(shù)字調(diào)諧器芯片 |
| 文件頁(yè)數(shù)： | 7/30頁(yè) |
| 文件大小： | 186K |
| 代理商： | GC1012A-CQ |
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GRAYCHIP,INC.
- 2 -
FEBRUARY 18, 1998
GC1012A DIGITAL TUNER
DATA SHEET REV 0.1
This document contains information which may be changed at any time without notice
1.2
BLOCK DIAGRAM
A block diagram illustrating the major functions of the chip is shown in Figure 1
Figure 1. GC1012A Block Diagram
Each of these functions are described below.
1.3
CONTROL INTERFACE
The control interface performs four major functions: It allows an external processor to configure the
chip, it allows an external processor to capture and read output samples from the chip, it allows an external
processor to perform diagnostics, and it generates internal synchronization strobes.
The chip is configured by writing control information into 8 bit control registers within the chip. The
contents of these control registers and how to use them are described in Section 3. The registers are written
to or read from using the
C[0:7]
,
A[0:3]
,
R/W
, and
CS
pins. Each control register has been assigned a
unique address within the chip. An external processor (a microprocessor, computer, or DSP chip) can write
into a register by setting
A[0:3]
to the desired register address, setting the
R/W
pin low, setting
D[0:7]
to
the desired value and then pulsing
CS
low.
To read from a control register the processor must set
A[0:3]
to the desired address, set
R/W
high,
and then set
CS
low. The chip will then drive
C[0:7]
with the contents of the selected register. After the
processor has read the value from
C[0:7]
it should set
CS
high. The
C[0:7]
pins are turned off (high
impedance) whenever
CS
is high or
R/W
is low. The chip will only drive these pins when
CS
is low and
R/W
is high.
M
DIAG-
NOSTIC
RAMP
DIGITAL
OSCILLATOR
COS
SIN
DIAG
SELECT
FREQ
PROGRAMMABLE
LOW PASS
FILTER
GAIN
ADJUST
OUTPUT
FORMAT
CHECKSUM
GAIN
I/Q
SAMPLES
BANDWIDTH
CONTROL INTERFACE
C0-C7
A0-A3
R/W
CS
REAL,
FLIP
CHECKSUM
I
Q
(10,12,14, OR 16 BITS)
STROBES
(WS,IFLAG)
SYNCS OUT
(SO,OS,INT,OFLOW)
CK
SYNCS IN
SS,AS,GS)
X
VCC
GND
AND
OFFSET
OUTPUTS
OPTIONS
(12 BITS)
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|---|---|
| GC1012A-PQ | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DIGITAL TUNER CHIP |
| GC1012B | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:3.3V DIGITAL TUNER CHIP |
| GC1012B_07 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:3.3V DIGITAL TUNER CHIP |
| GC1012B-PQ | 功能描述:調(diào)諧器 Sgl channel WB DDC RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| GC1012B-PQA | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:3.3V DIGITAL TUNER CHIP |
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