DVD-S530/DV-S5550
DVD-S530/DV-S5550
27
External Memory
The STi55xx family is capable of accessing external
memory via three buses:
• The enhanced memory interface (EMI). This
interface is configurable and can be used to access
Flash, ROM, and various types of DRAM. The EMI is
connected to:
– Flash/ROM in Bank 3 (item 7410 and 7401 optional).
This memory holds the DVD firmware, and is
controlled by pin 186 (FLASH_OE) of the STi5580. It
must be able to perform a download (by disk or
DCU) in a Flash-only system.
– SDRAM in Bank 0 (item 7402, optional). A 64Mbits
(4M x 16bits) 7.5ns SDRAM can be connected to the
EMI when the module is used as a Software
Development Module (SDM).
• The shared memory interface (SMI). The SMI is only
capable of accessing SDRAM. The SMI is connected to
a 64Mbits (4M x 16bit) 7.5ns SDRAM (item 7500).
There is no longer the option to use two pieces of
16Mbits SDRAM. The SDRAM 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.
• The I2C bus. Via this bus, the NVRAM (or EEPROM) is
accessible. This memory is used to store user settings,
player settings, and region code.
Audio Output
The audio interfaces available in SD4.0 are I2S and S/
PDIF for digital audio output, and I2S karaoke microphone
input.
I2S audio
The STi55xx is capable of 6-channel I2S output. These
channels can be configured to output 5.1 Dolby Digital,
DTS, etc.
• PCM_OUT0: left and right.
• PCM_OUT1: center and LFE.
• PCM_OUT2: left and right surround.
Two additional channels (available in STi5580 and
STi5588) are capable of providing down-mixed stereo.
S/PDIF
The S/PDIF signal level (item 7600, pin 57, SPDIF_OUT)
is 5V TTL at module interface. To meet the complete S/
PDIF specifications, an external de-coupling circuit (item
7716, diagram M7) is implemented.
Video Output
Analog video
The STi55xx is capable of 6-channel analogue video.
Three channels (pins 25, 26 and 27) are RGB or YUV
format, while the other three channels (pins 32, 33 and 34)
are Y, C, and CVBS.
A new video output buffer (see diagram M7, e.g. item 7707
for R) is implemented: an 8MHz/16MHz selectable filter
stage and a 75
Ω
drive stage.
Miscellaneous I/O Signals
Most general IO ports are connected directly to the
module interface.
SCART
The SCART0 and SCART1 signals are now directly
available at the module interface.
Mute
The MUTE signal is now directly available at the module
interface.
Service
Service Port Buffer
1k
5V
TXD_SER
RXD_SER
100R
1n5
Out
4k
4k
10k
3V3
6k8
In
10k
10k
Fig. 11
Buffers
The signal levels at the module interface are 3.3V only.
Note: Care must be taken that the external circuitry does
not force any IO line from the module to more than 3.8V.
External DAC
An external audio DAC from AKM (AK4382) is used.
Serial Bus Voltage Translator
3V3
3k3
5V
3k3
(optional)
5V I2C levels
3.3V I2C levels
Fig. 11
Since the 5V in the module is turned 'off' during the DVD
player’s standby mode, the pull-up to 5V on the module is
not used. Instead, pull-up resistors to a +5V standby
voltage are added outside the module.
