參數(shù)資料
型號(hào)： SAA7105H
廠商： NXP Semiconductors N.V.
元件分類： 通用總線功能
英文描述： Digital video encoder
文件頁(yè)數(shù)： 18/71頁(yè)
文件大小： 354K
代理商： SAA7105H
2004 Mar 04
18
Philips Semiconductors
Product specification
Digital video encoder
SAA7104H; SAA7105H
14 24 00 00
54 00 00 00
use pattern entries 4, 1, 4 and 2 in this sequence (for sync-black-sync-black-null)
use pattern entries 4 and 5 in this sequence (for sync-black)
Write to subaddress D3H (no signals are directed to pins HSM_CSYNC and VSM)
00
CC 00
80 00
0A 00
CC 00
80 00
points to first entry of value array (index 0)
black level, to be added during active video
sync level LOW (minimum output voltage)
sync level HIGH (3-level sync)
black level (needed elsewhere)
null (identical to sync level LOW)
Write to subaddress DCH
0B
insertion is active, gain for signal is adapted accordingly
SEQUENCE
COMMENT
7.18
I
2
C-bus interface
The I
2
C-bus interface is a standard slave transceiver,
supporting 7-bit slave addresses and 400 kbits/s
guaranteed transfer rate. It uses 8-bit subaddressing with
an auto-increment function. All registers are write and
read, except two read only status bytes.
The register bit map consists of an RGB Look-Up Table
(LUT), a cursor bit map and control registers. The LUT
contains three banks of 256 bytes, where each RGB triplet
is assigned to one address. Thus a write access needs the
LUT address and three data bytes following subaddress
FFH. For further write access auto-incrementing of the
LUT address is performed. The cursor bit map access is
similar to the LUT access but contains only a single byte
per address.
The I
2
C-bus slave address is defined as 88H.
7.19
Power-down modes
Inordertoreducethepowerconsumption,theSAA7104H;
SAA7105H supports 2 power-down modes, accessible via
the I
2
C-bus. The analog power-down mode (DOWNA = 1)
turns off the digital-to-analog converters and the pixel
clock synthesizer. The digital power-down mode turns off
all internal clocks and sets the digital outputs to LOW
except the I
2
C-bus interface. The IC keeps its
programming and can still be accessed in this mode,
howevernotallregisterscanbereadorwrittento.Reading
or writing to the look-up tables, the cursor and the HD sync
generator require a valid pixel clock. The typical supply
current in full power-down is approximately 5 mA.
Because the analog power-down mode turns off the pixel
clock synthesizer, there are limitations in some
applications. If there is no pixel clock, the IC is not able to
set its outputs to LOW. So, in most cases, DOWNA and
DOWND should be set to logic 1 simultaneously. If the
EIDIV bit is logic 1, it should be set to logic 0 before
power-down.
7.20
Programming the SAA7104H; SAA7105H
The SAA7104H; SAA7105H needs to provide a
continuous data stream at its analog outputs as well as
receive a continuous stream of data from its data source.
Because there is no frame memory isolating the data
streams, restrictions apply to the input frame timings.
Input and outputprocessing of the SAA7104H;SAA7105H
are only coupled through the vertical frequencies. In
master mode, the encoder provides a vertical sync and an
odd/even pulse to the input processing. In slave mode, the
encoder receives them.
The parameters of the input field are mainly given by the
memory capacity of the SAA7104H; SAA7105H. The rule
is that the scaler and thus the input processing needs to
provide the video data in the same time frames as the
encoder reads them. Therefore, the vertical active video
times (and the vertical frequencies) need to be the same.
The second rule is that there has to be data in the buffer
FIFO when the encoder enters the active video area.
Therefore, the vertical offset in the input path needs to be
a bit shorter than the offset of the encoder.
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PDF描述
SAA7105H Digital video encoder
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參數(shù)描述
SAA7105H/V1,518 功能描述:視頻 IC PC DENC WO MACROVISION LICENSE RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7105H/V1,557 功能描述:視頻 IC PC GRAPHICS 85MHZ RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7105HBG 功能描述:視頻 IC PC GRAPHICS 85MHZ ENCODER RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel
SAA7108 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:PC-CODEC
SAA7108AE 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:HD-CODEC
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