32579B

Signal Definitions

 

 

3.4.5TV Interface Signals

Signal Name

Ball No.

Type

Description

Mux

 

 

 

 

 

CVBS

A23,

O

Composite Video. Includes synchronization, luminance

See F4BAR0+

 

A24,

 

and chrominance components of video.

Memory Offset

 

D24

 

 

C08h[4:3] bit

 

 

 

 

description on

SVY

A24

O

Super Video Luminance. S-Video luminance signal.

page 356 for config-

 

 

 

 

SVC

C23

O

Super Video Chrominance. S-Video chrominance sig-

uration details.

 

 

 

nal.

 

 

 

 

 

 

TVR

A24,

O

TV Red. TV Red component signal for SCART.

 

 

C23

 

 

 

 

 

 

 

 

TVG

A23

O

TV Green. TV Green component signal for SCART.

 

 

 

 

 

 

TVB

C23,

O

TV Blue. TV Blue component signal for SCART.

 

 

D24

 

 

 

 

 

 

 

 

Y

A23

O

Intensity. Color intensity vector.

 

 

 

 

 

 

Cr

C23,

O

Chrominance Red. Red axis phase angle.

 

 

D24

 

 

 

 

 

 

 

 

Cb

A24,

O

Chrominance Blue. Blue axis phase angle.

 

 

C23

 

 

 

 

 

 

 

 

TVREF

C24

I/O

Voltage Reference. Reference voltage for TV DAC. This

---

 

 

 

signal reflects the internal voltage reference. If an exter-

 

 

 

 

nal voltage reference is used, this input is tied to a

 

 

 

 

1.235V reference.

 

 

 

 

 

 

TVCOMP

B26

I

Current Compensation for TV DAC. A 0.1 µF to 1.2 µF

---

 

 

 

capacitor is used to connect this ball to AVCCTV.

 

TVRSET

A25

I

TV Set Resistor. This signal sets the current-level for the

---

 

 

 

TV DAC. Typically, an 1140 Ω, 1% resistor is connected

 

 

 

 

between this ball and AVSSTV. The full scale current out-

 

 

 

 

put of TV DACs is 32 * TVREF / TVRSET. An 1140 Ω, 1%

 

 

 

 

resistor enables driving a double terminated 75 Ω trans-

 

 

 

 

mission line.

 

 

 

 

 

 

TVIOM

B23

O

TV Output Dump Current. Typically, a 9.3 Ω, 1% resistor

---

 

 

 

is connected between this ball and AVSSTV.

 

54

AMD Geode™ SC1200/SC1201 Processor Data Book

Page 54
Image 54
AMD SC1200, SC1201 manual TV Interface Signals, Super Video Chrominance. S-Video chrominance sig