µPC1830

17

Figure 5-4. Color Control Characteristic

(a) NTSC mode

(b) PAL mode

(4) Tint control circuit

Controls the phase of a color difference signal whose amplitude is adjusted by the color control circuit, in a range of

±45° according to the voltage of the tint control pin (pin 21), and adjusts tint on the screen.

Table 5-2 shows the demodulation angle and demodulation ratio in each mode and Figure 5-5 shows the control

characteristic.

Table 5-2. Demodulation Angle and Demodulation Ratio when

Tint Control Pin (Pin 21) Voltage = 2 V (TYP.)

Mode

Demodulation angle (

∠R-Y)

Demodulation ratio (R-Y/B-Y)

NTSC

105

° (TYP.)

0.75 (TYP.)

PAL

90

° (TYP.)

0.61 (TYP.)

Figure 5-5. Tint Control Characteristic

(a) NTSC mode

(b) PAL mode

0.8

0.1

0

12345

0.2

0.3

0.4

0.5

0.6

0.7

Color control pin voltage (V)

Tint control pin voltage: 2 V

0.9

1.0

0.8

0.1

0

12345

0.2

0.3

0.4

0.5

0.6

0.7

Color control pin voltage (V)

Tint control pin voltage: 2 V

0.9

1.0

+90

_90

0

12345

_45

0

+45

Tint control pin voltage (V)

Tint control pin voltage: MAX.

+90

_90

0

12345

_45

0

+45

Tint control pin voltage (V)

Tint control pin voltage: MAX.