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EN 106
9.
SACD 900
•
SDRAM Interface: The SDRAM interface forms a glue less
interface to one 16 Mbit (or one 64 Mbit) SDRAM device.
The interface takes care for the power-up sequence, mode
programming and refreshing of the SDRAM devices. This
is hard coded in the interface and does not have to be
controlled by the host.
•
Audio data input/output Interface:
–
DSD/PCM combined data output. DSD_PCM:
Output intended for a combined 6-channel DSD
(SACD) and PCM (DVD-CDDA) DAC. Switching
between the PCM data coming from the STi5505, and
the internal generated DSD signals, is done in the
FURORE IC.
–
Stereo DSD only output. DSD_stereo: 2-channel
DSD output with stereo down mix in the case of 5- and
6-channel, and normal stereo in case of 2-channel
DSD mode.
–
Stereo PCM data output. Two possible stereo
sources can be selected as stereo PCM output:
1. Stereo PCM coming from the STi5505 via the PCM
input on Furore.
2. Stereo or down-mix-PCM derived via a decimation
filter from the SACD-DSD signal.
–
Digital audio output interface (IEC958). The IEC958
format is intended to connect the SACD 900 to a digital
receiver. No DSD signals are defined for IEC958,
therefore the 'DSD-->PCM converted' signal is
transmitted. Following two types of signals are possible
on the digital interface:
1. IEC958 data coming from the STi5505.
2. IEC958 data (stereo or down-mix-PCM) derived
via a decimation filter from the SACD-DSD signal.
–
Clock + reset input. Two different processing clocks
and a reset pulse are needed:
1. Sys_clk: System clock for data processing part,
frequency can be 27 MHz or 768 * f
2. 384 * f
: Processing clock for LLD and post
S
processing.
3. RESETn is an asynchronous reset and should be
low for at least 1 period of DSD_CLK.
Memory
SDRAM
The size of the SDRAM is 2 times 16 Mbit or 1 time 64 Mbit (not
simultaneously).
The SDRAM (items 7504 and 7505) has the following
functions:
•
it is used by the MPEG video decoder as a frame buffer,
•
it holds the software and the variables used by it.
Flash-ROM
A 2MB Flash-ROM (item 7401) holds the DVD firmware, and is
controlled by pin 16 (FLASH_OEN) of the STi5505. It must be
able to perform a download (by disk or OS-link) in a Flash-only
system.
EEPROM
User settings, player settings, and region code are stored in a
2
32 Kb I
C EEPROM.
Circuit Descriptions and List of Abbreviations
9.4
9.4.1
.
P50
S
CVBS
Y IN
C IN
RGB
VMUTE
CENTER ON
DATA LR
DATA CL
DATA LS/RS
AMUTE
S/P DIF
Data Processing
Audio/Video (A/V) Board
General
This board is the interface panel between the DVD-player and
its peripherals. See also block diagram in Chapter 6. This
board has some added features compared to the 2nd
generation DVD 2B.
The control of the A/V board is done by the I
(see table below):
Description
Pin
Hi
CLK_SEL
12
Internal clock
CLKFREQSEL
11
384 * fs
DAC_RESET
10
Normal
DSD_PCM
6
DSD stream
output
SACD_ACT
5
SACD
SACD_BASSMGT 4
Configure 0
(LLL1)
VMUTE
7
Video mute
(audio direct)
Reserved
9
Block diagram
A/V Board
TO P-SCAN BOARD
1411
A
DIGITAL YUV
H SYNC
V SYNC
7600
DIG
ANA
AUDIO L / R
1405/04
7500
7321
7300
7302
1400
7324
7200
7204
7325
DAC
STD1
7201
7205
7421
STD3
DAC
STD2
7401 7402 7403
7420
FRONT
FRONT
SURROUND
CENTER
7326
7202
7206
7327
DAC
Figure 9-5
Video
The analogue video signals from the SD1.1 Mono Board are
fed to video buffer LA7109 (item 7500). Then (for Europe) they
2
C-decoder IC7107
Lo
External clock
192 * fs
Reset
PCM stream
output
CD
Configure 1
(SSS1)
No video mute
RGB
P50
SCART
STATUS
L / R
CVBS
1
2
CVBS
VIDEO OUT
SVHS
7504
Y
U
V
RGB
YUV
7322
7323
L
R
STEREO
AUDIO
AUDIO OUT
L
R
FRONT
C
SW
C / SW
MULTI CHANNEL
AUDIO
OUT
L
R
SURROUND
7604
OPTICAL
DIGITAL
AUDIO OUT
5506
1410
DIGITAL OUT
COAXIAL
CL 16532136 044 eps
261101
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