TA1310ANG Datasheet, PDF (58/106 Pages) Toshiba Semiconductor – NTSC VIDEO, CHROMA, DEFLECTION, AND DISTORTION COMPENSATION IC (WITH YUV INTERFACE AND ACB)

TA1310ANG
NOTE
ITEM
A₁₂ Color γ Characteristics
SW₆
C
SW MODE
SW₄₅ SW₅₂ SW₅₃
1)
2)
3)
B
A
A ⁴⁾
5)
6)
(#16 V_CC = 9 V, #37 V_CC = 9 V, #51 V_CC = 5 V, Ta = 25 ± 3°C)
MEASUREMENT METHOD
Set to external color difference input mode (subaddress (05H), data (81)).
Now set as follows :
Unicolor
:
Brightness
:
Relative phase amplitude :
Y mute
:
maximum (subaddress (00H), data (3F))
maximum (subaddress (01H), data (7F))
standard (subaddress (12H), data (00))
on (set D₇ of subaddress (02H) to 1).
Set SW_52a to a, set SW_53a to b, and input the signal shown in Fig.1) below to the B-Y input pin (TP53).
Set the color to the minimum and measure the picture period DC voltage v_Bγ0 of the B output pin (TP15).
Increase the color from the minimum. When the picture period DC voltage of the R output pin (TP13) changes, measure
the picture period DC voltage v_Bγ1 of the B output pin (TP15).
Using the values obtained above, calculate the color γ start point C_γsp by the following formula.
C_γsp = v_Bγ1 − v_Bγ0
Note 1: Where the bus data are not specified, set the preset value.
Note 2: Ensure the sync signal is always input to TP38 (SYNC IN).
58
2005-09-20