DLPC3470 datasheet(28/70 Pages) TI1

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DLPC3470

DLPS110 – APRIL 2018

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(1)

The user must stay within specifications for all source interface parameters such as max clock rate and max line rate.

(2)

The max DMD size for all rows in the table is 854 × 480.

(3)

To achieve the ranges stated, the composer-created firmware used must be defined to support the source parameters used.

(4)

These interfaces are supported with the DMD sequencer synchronization mode command (3Bh) set to auto.

(5)

Bits / Pixel does not necessarily equal the number of data pins used on the DLPC3470 controller . Fewer pins are used if multiple clocks

are used per pixel transfer.

(6)

By using an I2C command, portrait image inputs can be rotated on the DMD by minus 90 degrees so that the image is displayed in

landscape format.

(7)

All parameters in this row follow the BT.656 standard. The image format is always landscape.

(8)

BT.656 uses 16-bit 4:2:2 YCr/Cb.

7.2 Input Source

Table 2. Supported Input Source Ranges(1)(2)(3)(4)

INTERFACE

Bits / Pixel (5)

IMAGE TYPE

SOURCE RESOLUTION RANGE(6)

FRAME RATE

RANGE

HORIZONTAL

VERTICAL

Landscape

Portrait

Landscape

Portrait

Parallel

24 max

2D only

320 to 1280

200 to 800

320 to 1280

10 to 122 Hz

Parallel

24 max

3D only

320 to 1280

200 to 720

320 to 1280

98 to 102 Hz

118 to 122 Hz

BT.656-NTSC

(7)

See (8)

2D only

720

n/a

240

n/a

60 ±2 Hz

BT.656-PAL (7)

See (8)

2D only

720

n/a

288

n/a

50 ±2 Hz

7.2.1 Input Source - Frame Rates and 3-D Display Orientation

For 3D sources on the parallel interface, images must be frame sequential (L, R, L, ...) when input to the

DLPC3470 controller . Any processing required to unpack 3D images and to convert them to frame sequential

must be done by external electronics prior to inputting the images to the DLPC3470 controller . Each 3D source

frame input must contain a single eye frame of data separated by a VSYNC where an eye frame contains image

data for a single left or right eye. The signal 3DR input to the DLPC3470 controller tells whether the input frame

is for the left eye or right eye.

Each DMD frame will be displayed at the same rate as the input interface frame rate. Typical timing for a 50-Hz

or 60-Hz 3D HDMI source frame, the input interface of the DLPC3470 controller , and the DMD is shown in

Figure 8. GPIO_04 is optionally sent to a transmitter on the system PCB for wirelessly transmitting a

synchronization signal to 3D glasses. The glasses are then in phase with the DMD images being displayed.

Alternately, 3-D Glasses Operation shows how DLP Link pulses can be used instead.

Figure 8. DLPC3470 controller L/R Frame and Signals Timing

DLPC3470 Datasheet(PDF) 28 Page - Texas Instruments

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