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PDF AK8856 Data sheet ( Hoja de datos )
| Número de pieza | AK8856 | |
| Descripción | NTSC/PAL Digital Video Decoder | |
| Fabricantes | AKM | |
| Logotipo |  |
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ASAHI KASEI
[ AK8856 ]
AK8856
NTSC/PAL Digital Video Decoder
General Description
The AK8856 decodes NTSC or PAL composite video signals into digital video data. The outputs are ITU-R BT.
601 level compatible Y, Cb and Cr signals. The decoded result is scaled to 601, VGA (interlaced output), CIF,
QVGA, QCIF, rotated QVGA , or rotated CIF(progressive). Information including closed caption, VBID, and WSS
are encoded in the video signal can be read out externally. The AK8856 is controlled by through an I2C interface.
Features
• NTSC-M, NTSC-4.43 / PAL- B, D, G, H, I, N, Nc, M, 60 composite signal decoding process
• 10 Bit ADC (sampling at 24.5454MHz or 27MHz)
• Integrated PGA (0dB ~ 12dB)
• Automatic color control (ACC) function
• Adaptive automatic gain control (AGC) function
• 1D or 2D YC separation
• Phase compensation for PAL
• Output interface
- ITU-R BT.656 output format (4:2:2 8-bit parallel output with EAV / SAV)
- Camera interface
- Interface with HD / VD / DVALID signals
• Closed caption decoding function (read by register setting)
• VBID (CGMS-A) decoding function (CRCC decode) (read by register setting)
• WSS decoding function (read by register setting)
• Macrovision signal detect function
• Power-down function
• 2-channel analog input selector
• I2C control compatible
• Core voltage (AVDD, DVDD) 1.65 - 1.8V
• I/O voltage (PVDD) 1.65 - 3.3V (AK8856VG) / 1.65 - 3.6V (AK8856VN)
• Package: 41 FBGA 4.0mm x 4.0mm / 48 QFN 7.2mm x 7.2mm
* The output that meets the ITU-R BT.656 standard according to the fineness of the input signal might not be available.
Rev-01
1
2007/03
Free Datasheet http://www.datasheet-pdf.com/
1 page  
ASAHI KASEI
AK8856VN
[ AK8856 ]
NC
NC
AVDD
AVSS
AIN2
DVSS
DVDD
NSIG
MACDET
DVALID
NC
NC
48 47 46 45 44 43 42 41 40 39 38 37
1 36
2 35
3 34
4 33
5 32
48 QFN
6 31
(TOP VIEW)
7 30
8 29
9 28
10 27
11 26
12 25
13 14 15 16 17 18 19 20 21 22 23 24
NC
TEST0
PDN
DVDD
RSTN
OE
SCL
PVDD
SDA
DTCLK
TEST1
NC
Rev-01
5
2007/03
Free Datasheet http://www.datasheet-pdf.com/
5 Page 
ASAHI KASEI
[ AK8856 ]
- input from 27.00 MHz crystal oscillator is connected to this pin
Clock mode set: connect to either DVDD (high) or DVSS (low)
41 CLKMOD
D
I - Low setting: crystal oscillator is used
- High setting: external clock source is used
Internal negative reference voltage for ADC
- connect this pin to analog ground through a 0.1uF or larger capacitor
42 VRN
A I/O - this pin may go to high-Z in power-down mode (no high-Z test is performed in
production test)
- do not use this as a reference voltage source for external circuitry
Internal positive reference voltage for ADC
- connect this pin to analog ground through a 0.1uF or larger capacitor
43 VRP
A I/O - there is a case when this pin becomes Hi-Z output at power-down ( no Hi-Z test is
performed in mass-production test )
- do not use this pin as a reference voltage source for external circuit.
Reference current setting
44 IREF
A
I/O
- connect this pin to analog ground through a 6.8kΩ resistor (≤1% accuracy)
- this pin goes to high-Z in power-down mode (no high-Z test is performed in
production test)
Internal common voltage for AD converter
- connect this pin to analog ground via a 0.1 uF or larger capacitor.
45 VCOM
A I/O - there is case when this pin becomes Hi-Z output at power-down (no Hi-Z test is
performed in mass-production test ).
- do not use this pin as a reference voltage source for external circuit.
46 LPF
A
I/O
I/O for analog test
- connect this pin to AVSS for normal operation
47 AIN1
A I Analog input pin (1) ; if not used, leave floating
48 NC
No connection – leave floating
- Reserved for AKM testing
A/D/P A: AVDD, D: DVDD, P: PVDD
I/O I: Input pin, O: Output pin, I/O Input/Output pin
Note 1 ) Output pin conditions are determined by setting PDN and OE pins
OE
PDN
RSTN
Output1*
Output2*
L x x Hi-Z output L output
H
L
x
L output
L output
H
H
L
L output
L output
H Dataout(*1) Dataout(*1)
Output1*: DATA[7:0], HD/HV, VD/VAF/FIELD, DVALID, DTCLK
Output2*: NSIG, MACDET
Output pin conditions immediately following power-on are indeterminate, except at OE = “L“
(*1 ) With no analog input signal, black level data (Y = 0x10, Cb/Cr = 0x80) is output in decoder mode operation
Rev-01
11
2007/03
Free Datasheet http://www.datasheet-pdf.com/
11 Page | ||
| Páginas | Total 70 Páginas | |
| PDF Descargar | [ Datasheet AK8856.PDF ] | |
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