DM385 Datasheet, PDF (101/280 Pages) Texas Instruments – DM385 and DM388 DaVinci™ Digital Media Processor

DM385, DM388
www.ti.com
SPRS821D – MARCH 2013 – REVISED DECEMBER 2013
3.3.25 Video Output (Analog, TV)
Table 3-54. Video Output (Analog, TV) Terminal Functions
SIGNAL NAME [1]
HDDAC_A
HDDAC_B
HDDAC_C
HDDAC_HSYNC
HDDAC_IREF
HDDAC_VREF
HDDAC_VSYNC
TV_OUT0
TV_RSET
TV_VFB0
DESCRIPTION [2]
TYPE [3] AAR BALL [4]
Analog HD Video DAC (G/Y). This pin should be
connected to ground through a 165-ohm resistor.
O
A9
Analog HD Video DAC (B/Pb). This pin should be
connected to ground through a 165-ohm resistor.
O
A8
Analog HD Video DAC (R/Pr). This pin should be
connected to ground through a 165-ohm resistor.
O
B8
Analog HD Video DAC Discrete HSYNC Output
O
E9
Video DAC reference current. When the video DACs are I/O
B6
used, this pin should be connected to ground through a
2.67K-ohm resistor. When the video DACs are powered
down, this pin should be left unconnected.
Video DAC reference voltage. When the video DACs are I
B7
powered down, this pin should be left unconnected.
Analog HD Video DAC Discrete VSYNC Output
O
D9
Composite Amplifier Output. In Normal mode (internal O
B9
amplifier used), this pin drives the 75-Ohm TV load. An
external resistor (Rout) should be connected between
this pin and the TV_VFB0 pin and be placed as close to
the pins as possible. The nominal value of Rout is 2700
Ohm. In TVOUT Bypass mode (internal amplifier not
used), this pin is not used. When this pin is not used or
the TV output is powered-down, this pin should be left
unconnected.
TV Input Reference Current Setting. An external resistor A
B11
(Rset) should be connected between this pin and
VSSA_VDAC to set the reference current of the video
DAC. The value of the resistor depends on the mode of
operation. In Normal mode (internal amplifier used), the
nominal value for Rset is 4700 Ohm. In TVOUT Bypass
mode (internal amplifier not used), the nominal value for
Rset is 10000 Ohm. When the TV output is not used, this
pin should be connected to ground (VSS).
Composite Feedback. In Normal mode (internal amplifier O
B10
used), this pin acts as the buffer feedback node. An
external resistor (Rout) should be connected between
this pin and the TV_OUT0 pin. In TVOUT Bypass mode
(internal amplifier not used), this pin acts as the direct
Video DAC output and should be connected to ground
through a load resistor (Rload) and to an external video
amplifier. The nominal value of Rload is 1500 Ohm.
When this pin is not used or the TV output is powered-
down, this pin should be left unconnected.
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