ta1383afg TOSHIBA Semiconductor CORPORATION, ta1383afg Datasheet - Page 8

• Manufacturer Part Number: ta1383afg
• Description: Ntsc Chroma Decoder, Multi-point Scan Sync Processor, H/v Frequency Counter Ic For Color Tv
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Bus Control Functions
Write Function
READ SW
INPUT SW
H/V FREQ
AFC-RAN
FREQ DET SW
Signal
Switches Read Mode.
Switches luminance, chroma, and sync signals.
Switches horizontal oscillation frequency and vertical pull-in range.
Switches horizontal AFC pull-in range.
Switches frequency counting input.
Note: To count frequency, use Bus Mode (10/11). However, note that in Bus
Switches Read Mode.
Switches pull-in range of 525I/P, 750P, and 1125I horizontal frequencies.
Switches input pin for counting frequency.
0: READ MODE 2 (counts frequency)
1: READ MODE 1 (self diagnosis)
000: SYNC1/Y1/C1
010: SYNC2/Y2/C2
100: D-SYNC1/Y3/CbCr (PbPr)
110: HD/VD/Y3/CbCr (PbPr)
000: Horizontal oscillation frequency 15.734 kHz, vertical pull-in range
001: Horizontal oscillation frequency 31.5 kHz, vertical pull-in range 48H to
010: Horizontal oscillation frequency 33.75 kHz, vertical pull-in range 48H to
011: Horizontal oscillation frequency 45 kHz, vertical pull-in range 48H to
100: Horizontal oscillation frequency 15.734 kHz, forced vertical pull-in
101: Horizontal oscillation frequency 15.734 kHz, vertical pull-in range
110: D5 (1125P/60 Hz) input mode (H: 33.75 kHz Free-run, V: 48H to
111: RGB Input Mode (H frequency 33.75 kHz Free-run, V pull-in range
0: NORMAL
00: 525I1 (rejects pulse of 1.75 µs or less.) (pins 2, 4, and 30)
01: 525I2 (inputs H-sync for AFC. (and rejects pulse of 0.3 µs or less.) )
(pins 2, 4, and 30)
10: D-SYNC2 (pin 6)
11: HD/VD (pins 5 and 7)
Mode (00/01), frequencies such as 525P, 750P, and 1125I cannot be
counted. In this mode (00/01), frequencies may not be counted accurately
due to weak electric fields or ghosts.
224.5H to 297H (262.5H at quiescent)
612H (525H at quiescent)
636H (562.5H at quiescent)
848H (750H at quiescent)
range 262.5H
32.5H to 297H (at multi-windows)
636H)
Internal clamping pulse, internal H-BLK and HD output are generated
by inputted sync.
When no-signal inputted, the clamp pulse, the H-BLK and VD output
are switched to free-run signals of 33.75 kHz/562.5H. And then, HD
output is gone.
Set AFC-Mode = (111) and INPUT SW = (100), when this mode used.
48H to 740H)
Input HD signal is used as clamp pulse. HD/VD-OUT outputs are
remade of input signals. (H-pull-in range: 5.7 kHz to 120 kHz, V-pull-in
range: 47 Hz to 688 Hz, HD input width: 0.2 µs to 10 µs, VD input
width: 3 µs to 1.45 ms)
When no-signal inputted, the clamp pulse, the H-BLK and VD output
are switched to free-run signals of 33.75 kHz/562.5 H. And then, HD
output is gone.
Set AFC-Mode = (111) and INPUT SW = (111), when this mode used.
In this mode, when TEST = 01, V-pull-in range becomes 0 to 688 Hz.
Then, VD output is gone when no-input.
1: Narrow
Function
8
001: SYNC2/Y1/C1
011: SYNC2/Y3/CbCr (PbPr)
101: D-SYNC1/RGB
111: HD/VD/RGB
Power-On Initial Value
V: 224.5H to 297H
TA1383AFG
SYNC1/Y1/C1
H: 15.734 kHz
Self diagnosis
D-SYNC2
NORMAL
2005-09-05
(000)
(000)
(10)
(1)
(0)