TC90101FG Toshiba, TC90101FG Datasheet - Page 7

• Manufacturer Part Number: TC90101FG
• Manufacturer: Toshiba

Specifications of TC90101FG

• Function: Multi-standard color decoder and 3L Y/C separation
• Features: 525p/625p freq. detectionPicture improverITU-R656 output
• Power Requirements: 3.3V, 2.5V, 1.5V
• Package: LQFP100 (lead-free)

Feb./2005
3. Clamping
4. TV system detection for CVBS and S- Video input
The amplitude of input signal for 10bit ADC is 0.7Vp-p as 140IRE. in case of C signal for S-video.
The amplitude of input signal for C ADC is 0.2Vp-p as 40IRE. (Refer to Fig-2.)
The amplitude of input signal for Cb/Cr is 0.7Vp-p as 100% level. (Refer to Fig-3.) (VDD = 2.5V)
Input signal vs output signal level
※ Input signal amplitude： For CVBS and Y, it means 100% level (140IRE).
Notice: Ｔｈｅｓｅ amplitude of output signal have done by initial value of IIC registers related with gain.
The clam control circuit controls the corect clamping for input signals.
TC90101FG has a feed back clamp for H-Sync portion of CVBS/Y input signal to clamp 256LSB(10bit unit).
It is selectable to use the 2 types of the feed back clamp (internal circuit or external circuit) via
IIC bus. (FBCLMPEX at sub address 03 hex.)
In case use external, the clamp signal from YCLAMP1,YCLAMP2(pin 74,75) to be connected with input
Terminals. (refer to application circuit.)
For C signal, it is biased to 128 LSB. For Cb and Cr signal, it is used keed clamping control to 128 LSB.
TC90101FG has 4 types of detection mode and it is selectable via AUTDET at sub address 00hex.
Input mode
AUTODET
S- Video/
CVBS
Ｙ
C
Cb
Cr
There is not priority for 50Hz/60Hz(Vertical frequency) detection.
VD output (pin 70) is controled via VD.DET at sub address 23hex.
Input signal
CVBS+
YCbCr
YCbCr
CVBS
(1H)
00
01
10
11
[00] : free run.
[01] : fixed mode when it detects no signal (The frequency of VDOUT is depends on TVM2.)
[10] : Fixed Frequency at Manual setting mode.
[11] : VDOUT is depends on TVM2 at all of TV system detection mode.
Input signal
0.7Vp-p（500mVp-p）
0.7Vp-p（500mVp-p）
0.2Vp-p（Burst）
0.7Vp-p (100% color)
0.7Vp-p (100% color)
Manual setting
South America
CVBS
CVBS
Cb/Cr
Cb/Cr
Full multi
C
Y
Y
Mode
Input signal amplitude：
EU
(500mVp-p: pedestal to white 100%.)
Cb/Cr, it means 100% color bar Signal.
Vp-p（※）
Pin
number
88/94
88/94
81
78
86
81
78
-
4.4336MHz
3.57954MHz
3.57954MHz
3.5756MHz
3.5820MHz
4.4336MHz
3.57954MHz
3.5756MHz
3.5820MHz
Fsc detection
8bit(ＭＰＸ)
ADC
10bit
10bit
10bit
8bit
8bit
8bit
TV system is set via TV0 – TV3 at sub address 00hex.
Priority : 4.43MHz PAL→ NTSC→ SECAM
(it’s not available to detect 3.58MHz PAL signal.)
Priority : 3.58MHz PAL→ 3.58MHz NTSC
(it’s not available to detect 4.43MHz fsc signal.)
Priority : PAL→ NTSC→ SECAM
16-235(pedestal to white 100%) （8bit mode）
16-235(pedestal to white 100%) （8bit mode）
16-240（8bit mode）
16-240（8bit mode）
16-240（8bit mode）
Clamping function
Feed back clamp
−
Keed clamp
Sync chip clamp
Feed back clamp
Keed clamp
Ouput signal level（LSB）
Time constant is selectable for
internalClamping mode via BUS
FBCLMOD atSub address 32hex.
Biased to 128LSB
Commemt
Comment
TC90101FG
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