ML6460CS 查看數據表（PDF） - Micro Linear Corporation
零件编号
产品描述 (功能)
生产厂家
ML6460CS Datasheet PDF : 30 Pages
| |||
ML6460
FUNCTIONAL DESCRIPTION
INTRODUCTION
The ML6460 is a single-chip NTSC video encoder for
generating analog composite (CV) and S-video (Y/C)
outputs from YCrCb digital inputs. The ML6460 is a mixed
signal processor optimizing SNR and distortion by
performing subcarrier generation, sync generation,
modulation and upsampling in the digital domain, while
performing mixing, reconstruction and gain scaling in the
analog domain. In particular, the Y channel requires no
digital scaling, eliminating the need for higher precision
digital solutions. All timing is based on an external clock
source either 27MHz for CCIR656 clock rate or
24.54MHz for square pixel clock rate.
Additionally, the ML6460 allows the inclusion of Closed
Captioning codes in the vertical blanking interval (VBI).
Both lines 21 and 284 support Closed Captioning. The
ML6460 also incorporates Macrovision® copy protection
technology.
Other special functions include: programmable polarity
and relative position of sync pulses, master and slave
modes of which includes the ability to handle ITU-R656-
compliant digital TV or ITU-R/SMPTE specifications,
chroma subcarrier phase and frequency adjustments from
external source; Japanese NTSC support; 100% color bars
processing; and internal 7th order reconstruction filters
with group delay equalization and 6dB line drivers for
direct TV output.
The ML6460 can be programmed and controlled via a
two-wire serial bus or preset modes. A summary of the
features of the ML6460 are listed in Table 1.
VIDEO STANDARDS SUPPORTED
The ML6460 supports NTSC only. The video standards and
clock rates are listed in Table 2.
DEVICE
FUNCTIONAL DESCRIPTION
Video Formats
Clock
Rates
DAC
Closed
Caption
Encoder
Macrovision
Reconstruction
Filter
75Ω
Cable
Driver
NTSC
PAL CCIR656 Square
Pixel
ML6460 Yes. Input: 8-Bit No Yes
Yes
Yes.
Yes
Yes
YCrCb digital
10-bit
Outputs: Y, C,
DAC
and CV analog
ML6461 Yes. Input: 8-Bit No Yes
Yes
Yes.
Yes
No
YCrCb digital
10-bit
Outputs: Y, C,
DAC
and CV analog
Table 1. Video Encoder Functional Selection
Yes. 7th-order
Yes.
Butterworth, with
group delay
equalization
Yes. 7th-order
Yes.
Butterworth, with
group delay
equalization
INPUT
NTSC CCIR656
NTSC Square Pixel
CLOCK RATE
27 MHz
24.54 MHz
HORIZONTAL
LINES PER FRAME
525
525
Table 2: Video Standards and Clock Rates
PIXELS PER
HORIZONTAL LINE
858
780
MODE
Master Mode
External Slave Mode
Internal Slave Mode (SAV/EAV CCIR656)
VSYNC PIN
OUT
IN
OUT
HSYNC PIN
OUT
IN
OUT
Table 3: Pin Assignments for Various Master/Slave Modes
6
FIELD PIN
IN/OUT
IN/OUT
IN/OUT
Share Link: 