SAA7154E/V2/G,518 NXP Semiconductors, SAA7154E/V2/G,518 Datasheet - Page 34
SAA7154E/V2/G,518
Manufacturer Part Number
SAA7154E/V2/G,518
Description
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7154EV2G518.pdf
(90 pages)
Specifications of SAA7154E/V2/G,518
Adc/dac Resolution
10b
Screening Level
Commercial
Package Type
LBGA
Pin Count
156
Lead Free Status / RoHS Status
Compliant
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NXP Semiconductors
SAA7154E_SAA7154H_2
Product data sheet
7.14.1 Analog terminals
7.14.2 Audio clock signals
The SAA7154E; SAA7154H has 16 analog inputs AI41 to AI44, AI31 to AI34,
AI21 to AI24 and AI11 to AI14 for composite video CVBS or s-video Y/C signal pairs or
component video input signals RGB plus separate sync (or Y-P
Component signals with e.g. sync-on-Y or sync-on-green are also supported; they are fed
to two ADC channels, one for the video content, the other for sync conversion.
Additionally, there are four differential reference inputs which must be connected to
ground through a capacitor equivalent to the decoupling capacitors at the 16 inputs. There
are no peripheral components required other than these decoupling capacitors and
termination resistors, one set per connected input signal.
When using the OSD feature in combination with the SAA5697HL, the analog pins AI22,
AI32, AI42 and AI44 are reserved for analog OSD and can not be used for other input
sources.
Clamp and gain control for the four ADCs are also integrated. Two analog video outputs
(pins AOUT1 and AOUT2) are provided. They can be used for analog output for one of the
input signals. In addition, pin AOUT2 can output the sum of two analog input signals. This
can be used for CVBS generation from an Y/C signal.
Table 8.
The SAA7154E; SAA7154H also synchronizes the audio clock and sampling rate to the
video frame rate through a very slow PLL. This ensures that multimedia capture and
compression processes always gather the same predefined number of samples per video
frame.
An audio master clock AMCLK and two divided clocks ASCLK and ALRCLK are
generated:
The ratios are programmable.
Pin
AI11 to AI14
AI21 to AI24
AI31 to AI34
AI41 to AI44
AOUT1
AOUT2
AI1D, AI2D,
AI3D and AI4D
•
•
ASCLK: can be used as audio serial clock
ALRCLK: audio left/right channel clock.
Analog pin description
I/O
I
O
O
I
Rev. 02 — 6 December 2007
Description
analog video signal inputs, e.g. 16 CVBS signals or
eight Y/C pairs or four RGB plus separate sync (or
Y-P
connected simultaneously to this device; many
combinations are possible
analog video output 1
analog video output 2
analog reference pins for differential ADC
operation; connect to ground through 47 /22 nF
B
-P
R
plus separate sync) signal groups can be
SAA7154E; SAA7154H
Multistandard video decoder with comb filter
B
-P
R
plus separate sync).
Control through
MODE[5:0]
AOSL1[3:0]
AOSL2[1:0],
AOSL2A[1:0] and
AOSL2B[1:0]
-
© NXP B.V. 2007. All rights reserved.
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