3
1.2 M
EMORY
1.2.1
SDRAM Memory Interface
The MT1379 provides a glueless 16-bit interface to DRAM memory devices used as
OSD, MPEG stream and video buffer memory for a DVD player. The maximum amount of
memory supported is 16 MB of Synchronous DRAM (SDRAM). The memory interface is
configurable in depth to support 128-Mb addressing. The memory interface controls access to
both external SDRAM memories, which can be the sole unified external read/write memory acting
as program and data memory as well as various decoding and display buffers.
1.3 D
RIVE
I
NTERFACES
The MT1379 supports the DV34 interface, and other RF and servo interfaces used by
many types of DVD loaders. These interfaces meet the specifications of many DVD loader
manufacturers.
1.4 F
RONT
P
ANEL
The front panel is based around an Futaba VFD and a common NEC front panel
controller chip, (uPD16311). The MT1379 controls the uPD16311 using several control signals,
(clock, data, chip select). The infrared remote control signal is passed directly to the MT1379 for
decoding.
1.5 R
EAR
P
ANEL
A typical rear panel is included in the reference design. This rear panel supports:
- Six channel or two channel audio outputs
- Optical and coax S/PDIF outputs.
- Composite, S-Video, and SCART outputs
The six-video signals used to provide CVBS, S-Video, and RGB are generated by the
MT1379’s
internal video DAC. The video signals are buffered by external circuitry.
Six channel audio output by the MT1379 in the form of three I
2
S (or similar) data streams. The
S/PDIF serial stream is also generated by the MT1379 output by the rear panel. The six channel
audio DACs (AK4356,PCM1606) are used for six channel audio output with MT1379, and
similarly AK4382A ,CS4392 Audio DACs are used for two channel audio output with MT1379.
