TMS320DM8148 Datasheet, PDF (139/343 Pages) Texas Instruments – TMS320DM814x DaVinci™ Digital Media Processors

TMS320DM8148, TMS320DM8147
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SPRS647 – MARCH 2011
3.2.24 Video Output (Analog, TV)
SIGNAL
NAME
TV_OUT0
TV_OUT1
TV_VFB0
TV_VFB1
Table 3-47. Video Outupt (Analog, TV) Terminal Functions
NO.
AH24
AH22
AG23
AG22
TYPE ⁽¹⁾
OTHER ^{(2) (3)}
DESCRIPTION
VIDEO INTERFACES (TV)
Composite/S-Video (Luminance) Amplifier Output.
In Normal mode (internal amplifier used), this pin drives the 75-Ω 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.
O
–
The nominal value of Rout is 2700 Ω.
VDDA_VDAC_1P8
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.
S-Video (Chrominance) Amplifier Output.
In Normal mode (internal amplifier used), this pin drives the 75-Ω TV
load.
An external resistor (Rout) should be connected between this pin and
O
–
the TV_VFB1 pin and be placed as close to the pins as possible. The
VDDA_VDAC_1P8 ^{nominal value of Rout is 2700 Ω.}
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.
Composite/S-Video (Luminance) Feedback.
In Normal mode (internal amplifier used), this pin acts as the buffer
feedback node.
An external resistor (Rout) should be connected between this pin and
the TV_OUT0 pin.
AO
–
VDDA_VDAC_1P8 ^{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 Ω.
When this pin is not used or the TV output is powered-down, this pin
should be left unconnected.
S-Video (Chrominance) Feedback.
In Normal mode (internal amplifier used), this pin acts as the buffer
feedback node.
An external resistor (Rout) should be connected between this pin and
the TV_OUT1 pin.
AO
–
VDDA_VDAC_1P8 ^{In TVOUT Bypass mode (internal amplifier not used), it 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 Ω.
When this pin is not used or the TV output is powered-down, this pin
should be left unconnected.
(1) I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal, MM = Multi Muxed, DSIS =
De-selected Input State
(2) IPD = Internal Pulldown Active, IPU = Internal Pullup Active, DIS = Internal Pull Disabled. This represents the default state of the
Internal Pull after Reset. For more detailed information on pullup/pulldown resistors and situations where external pullup/pulldown
resistors are required, see , Pullup/Pulldown Resistors and , Pin Behaviors at Reset.
(3) Specifies the operating I/O supply voltage for each signal
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