Spectrum Digital, Inc
2.1.4 UART Interface
The internal UART0 on the DM355 device is driven to connector P4. The UART’s
interface is routed to the RS-232 line drivers prior to being brought out to a DB-9
connector, P4.
2.1.5 USB Interface
The DM355 incorporates an on chip USB II controller. This interface is brought out to a
mini A/B connector with its own power regulator. Two jumpers are provided to make a
flexible host peripheral, and USB on the go interface.
2.2 Input Video Port Interfaces/Imager Input Ports
The DM355 EVM supports video capture via the devices internal video ports. A Texas
Instruments TVP5146 is used to decode composite video or S-video inputs into the
device. J11 is used for the S-video inputs and J2 for the composite inputs on the EVM.
The input port can also be driven by LCD imagers connected to connectors J30 and
J31. The imager or encoder is selectable via software control on I 2 C bus by accessing
MSP430 registers.
2.2.1 On Chip Video Output DAC
The DM355 incorporates 1 composite video output DAC to interface to various video
output standards. The DAC is filtered and driven to RCA jack, J4.
2-3
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