Spectrum Digital, Inc
2.2.3 CAN Interface
The internal CAN controller on the DM6437 device is driven to connector P7. The
controller is routed to a Texas Instruments SN65HVD235 CAN controller prior to being
routed to female DB-9 connector, P7. The on board CAN signals can be disabled by
pulling CAN_ENABLEn high via the daughter card connector.
2.3 Video Interfaces
The DM6437 EVM has video input and output ports to support a variety of user
applications. These are discussed in the two sections below.
2.3.1 Input Video Port Interfaces
The DM6437 EVM supports video capture via the devices internal video ports. A Texas
Instruments TVP5146M2 is used to decode composite video or S-video inputs into the
device. P2 is used for the S-video inputs and J5 for the composite inputs on the EVM.
User inputs can be driven via daughter card connector DC_P1 when the on board CBTs
are disabled by driving control TVP5146_ENABLEn signal high on DC_P1.
2.3.2 On Chip Video Output DACs
The DM6437 incorporates 4 output DACs to interface to various output standards. The
DACs are buffered via opamps and driven to four RCA jacks, J1-J4. The outputs of the
DACs are programmable to support composite video, component video, or RGB.
S-video output is available from connector P1. This connector is driven by video DACs
B and C from the DM6437. Video DAC B is the chroma and video DAC C is the luma.
2-3
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