AKM AK8853VN

[AK8853XQ/ VN]
AK8853XQ/ VN
NTSC/PAL/SECAM Digital Video Decoder
Overview
The AK8853 is a single-chip digital decoder for NTSC, PAL, and SECAM composite video signals. Its
output data is in YCbCr format, compliant with ITU-R BT.601. Its pixel clock, with a generated clock
rate of 27 MHz, synchronizes with the input signal. Its output interface is ITU-R BT.656 compliant.
Closed-caption, VBID, and WSS encoded information in the input signal is externally accessible.
Microprocessor access is via a I2C interface.
Features
Decodes composite video signals NTSC (J, M, 4.43), PAL (B, D, G, H, I, M, N, Nc, 60), SECAM.
Four input channels, with internal video switch.
10-bit ADC 1 channel.
Internal line-locked and frame-locked PLLs for generation of clock synchronized with input signal.
Internal PGA (-6 dB to 6 dB).
Adaptive automatic gain control (AGC).
Auto color control (ACC).
Image adjustment (contrast, saturation, brightness, hue, sharpness).
Automatic input signal detection.
Adaptive 2-D Y/C separation.
PAL decoding phase correction.
ITU-R BT.656 format output (with 4:2:2_8 bit parallel_EAV/SAV)
Closed-caption signal decoding (output via register).
WSS signal decoding (output via register).
Macrovision signal detection (Macrovision certification).
Power down function.
I2C control.
1.70~2.00 V core power supply.
1.70~3.60 V interface power supply.
Operating temperature range: −40°C to 105°C. (AK8853XQ)
Operating temperature range: −40°C to 85°C. (AK8853VN)
48-pin LQFP package. (AK8853XQ)
48-pin QFN package. (AK8853VN)
(Note) The difference between AK8853XQ and AK8853VN is operating temperature range and package type.
Rev-E-00
1
2008/01
[AK8853XQ/ VN]
1. Functional block diagram
TEST0 TEST1
XTI
XTO
CLKMD
SELA SDA SCL
TEST
PDN RSTN
OE
Microprocessor
Timing Controller
LOGIC
Clock
Interface
Digital PLL
Module
Sync
AIN1
27MHz
Luminance
Separation
Y
AIN2
MUX
CLAMP
AAFilter
PGA
YC
Decimation
ADC
CVBS
AIN3
10-bit
Filter
Separation
CVBS
C
AIN4
HD
Process
VD_F
VBI
Output
Decoding
Buffer
DVALID_F
NSIG
DTCLK
Chrominance
Process
DATA[7:0]
VREF
ATIO
Rev-E-00
VRP
VCOM
VRN
IREF
AVDD
AVSS
2
DVDD
DVSS
PVDD1
PVDD2
2008/01
[AK8853XQ/ VN]
2. Pin assignment – 48 pins LQFP/ 48 pins QFN
DATA0
TEST0
TEST1
DVDD
DVSS
SDA
PVDD2
SCL
SELA
OE
RSTN
PDN
36 35 34 33 32 31 30 29 28 27 26 25
CLKMD
DVDD
XTI
DVSS
XTO
AVSS
AVDD
IREF
AVSS
ATIO
VCOM
AIN4
24
23
22
21
20
19
18
17
16
15
14
13
37
38
39
40
41
42
43
44
45
46
47
48
DATA1
DATA2
DATA3
DATA4
PVDD1
DTCLK
DVSS
DATA5
DATA6
DATA7
HD
VD_F
1 2 3 4 5 6 7 8 9 10 11 12
DVALID_F
NSIG
3
DVSS
DVDD
AVSS
AIN1
AVDD
AVSS
AIN2
VRP
AIN3
VRN
Rev-E-00
2008/01
[AK8853XQ/ VN]
3. Pin functions
Pin
No.
Symbol
P/S1
I/O2
Description
Internal reference negative voltage pin for AD converter.
Connect to AVSS via ≥0.1 µF ceramic capacitor.
Analog video signal input pin. Connect via 0.033 µF capacitor and
2
AIN3
A
I
voltage-splitting resistors as shown in Sec. 11.
Internal reference positive voltage pin for AD converter.
3
VRP
A
O
Connect to AVSS via ≥0.1 µF ceramic capacitor.
Analog video signal input pin. Connect via 0.033 µF capacitor and
4
AIN2
A
I
voltage-splitting resistors as shown in Sec. 11.
5
AVSS
A
G
Analog ground pin.
6
AVDD
A
P
Analog power supply pin.
Analog video signal input pin. Connect via 0.033 µF capacitor and
7
AIN1
A
I
voltage-splitting resistors as shown in Sec. 11.
8
AVSS
A
G
Analog ground pin.
9
DVDD
D
P
Digital power supply pin.
10 DVSS
D
G
Digital ground pin.
Shows status of synchronization with input signal.
Low: Signal present (synchronized).
11 NSIG
P1
O
High: Signal not present or not synchronized.
See Table below for relation of output to OE, PDN, RSTN pin status.
DVALID/FIELD signal output pin.
O
DVALID_
DVALID and FIELD output signals switched by register setting.
12
P1
F
(I/O) Used as I/O pin in Test Mode.
See Table below for relation of output to OE, PDN, RSTN pin status.
Vertical timing/ field timing signal output pin.
13 VD_F
P1
O
VD and FIELD output signals switched by register setting.
See Table below for relation of output to OE, PDN, RSTN pin status.
Horizontal timing signal output pin.
O
14 HD
P1
Used as I/O pin in Test Mode.
(I/O) See Table below for relation of output to OE, PDN, RSTN pin status.
Data output pin. (MSB)
O
15 DATA7
P1
Used as I/O pin in Test Mode.
(I/O) See Table below for relation of output to OE, PDN, RSTN pin status.
Data output pin.
O
16 DATA6
P1
Used as I/O pin in Test Mode.
(I/O) See Table below for relation of output to OE, PDN, RSTN pin status.
Data output pin.
O
17 DATA5
P1
Used as I/O pin in Test Mode.
(I/O) See Table below for relation of output to OE, PDN, RSTN pin status.
18 DVSS
D
G
Digital ground pin.
Data clock output pin.
19 DTCLK
P1
O
Approx. 27 MHz clock output.
See Table below for relation of output to OE, PDN, RSTN pin status.
20 PVDD1
P1
P
I/O power supply pin.
Data output pin.
O
21 DATA4
P1
Used as I/O pin in Test Mode.
(I/O) See Table below for relation of output to OE, PDN, RSTN pin status.
1
Power supply: A, AVDD; D, DVDD; P1, PVDD1; P2, PVDD2.
2
Input/Output: O, output pin; I, intput pin; I/O, input/output pin; P, power supply pin;
G, ground connection pin.
1
VRN
Rev-E-00
A
O
4
2008/01
[AK8853XQ/ VN]
Pin
No.
Symbol
P/S1
22
DATA3
P1
23
DATA2
P1
24
DATA1
P1
25
DATA0
P1
26
27
28
29
TEST0
TEST1
DVDD
DVSS
D
D
D
D
30
SDA
P2
31
PVDD2
P2
32
SCL
P2
33
SELA
P2
34
OE
P2
35
RSTN
P2
36
PDN
P2
37
CLKMD
D
38
DVDD
D
I/O2
Description
Data output pin.
O
Used as I/O pin in Test Mode.
(I/O) See table below for relation of output to OE, PDN, RSTN pin status.
Data output pin.
O
Used as I/O pin in Test Mode.
(I/O) See table below for relation of output to OE, PDN, RSTN pin status.
Data output pin.
O
Used as I/O pin in Test Mode.
(I/O) See table below for relation of output to OE, PDN, RSTN pin status.
Data output pin.
O
Used as I/O pin in Test Mode.
(I/O) See table below for relation of output to OE, PDN, RSTN pin status.
I
Pin for test mode setting. Connect to DVSS.
I
Pin for test mode setting. Connect to DVSS.
P
Digital power supply pin.
G
Digital ground pin.
I2C data pin. Connect to PVDD2 via a pull-up register.
I/O Hi-z input possible when PDN=L.
Will not accept SDA input during reset sequence.
P
Microprocessor I/F power supply pin.
I2C clock input pin. Use PVDD2 or lower for input.
I
Hi-z input possible when PDN=L.
Will not accept SCL input during reset sequence.
I2C bus address selector pin.
I
PVDD2 connection: Slave address [0x8A]
DVSS connection: Slave address [0x88]
Output enable pin.
L: Digital output pin in Hi-z output mode.
I
H: Data output mode.
Hi-z input to OE pin is prohibited.
Reset signal input pin.
Hi-z input is prohibited.
I
L: Reset.
H: Normal operation.
Power-down control pin.
Hi-z input is prohibited.
I
L: Power-down.
H: Normal operation.
Clock mode selection pin. Connect to DVDD or DVSS.
DVSS connection: For crystal.
I
DVDD connection: For quartz generator or other external
clock input; not for crystal.
P
Digital power supply pin.
Crystal connection pin.
Connect to digital ground via 22 pF capacitor as shown in Sec. 11.
39 XTI
D
I
Use 24.576 MHz crystal resonator.
For input from 24.576 MHz crystal oscillator, use this pin.
1
Power supply: A, AVDD; D, DVDD; P1, PVDD1; P2, PVDD2.
2
Input/Output: O, output pin; I, intput pin; I/O, input/output pin; P, power supply pin;
G, ground connection pin.
Rev-E-00
5
2008/01
[AK8853XQ/ VN]
Pin
No.
40
Symbol
DVSS
P/S1
I/O2
D
G
Description
Digital ground pin.
Crystal connection pin.
Connect to digital ground via 22 pF capacitor as shown in Sec. 11.
41 XTO
D
O
Use 24.576 MHz crystal.
When PDN=L, output level is DVSS.
If crystal is not used, connect to NC or DVSS.
42 AVSS
A
G
Analog ground pin.
43 AVDD
A
P
Analog power supply pin.
Reference current setting pin.
44 IREF
A
O
Connect to ground via 6.8 kΩ (≤1% accuracy) resistor.
45 AVSS
A
G
Analog ground pin.
46 ATIO
A
I/O Analog test pin. For normal operation, connect to AVSS.
Common internal voltage for AD convertor.
47 VCOM
A
O
Connect to AVSS via ≥0.1 µF ceramic capacitor.
Analog video signal input pin. Connect via 0.033 µF capacitor and
48 AIN4
A
I
voltage-splitting resistors as shown in Sec. 11.
1
Power supply: A, AVDD; D, DVDD; P1, PVDD1; P2, PVDD2.
2
Input/Output: O, output pin; I, intput pin; I/O, input/output pin; P, power supply pin;
G, ground connection pin.
Output pin status as determined by OE, PDN, and RSTN pin status.
OE
PDN
RSTN
Output11
Output21
L
x
x
Hi-z output
L output
H
L
x
L output
L output
L
L output
L output
H
H
Default Data Out2
H
Default Data Out2
1
Output1: DATA[7:0], HD, VD_F, DVALID_F, DTCLK
Output2: NSIG
If OE=H and PDN=H just after power is turned on, output pin status will be indefinite
until internal state is determined by reset sequence.
2
In the absence of AIN signal input, output will be black data ((Y=0x10, Cb/Cr=0x80).
(Blueback output can be obtained by register setting.)
Rev-E-00
6
2008/01
[AK8853XQ/ VN]
4. Electrical specifications
4.1 Absolute maximum ratings
Parameter
Supply voltage
DVDD, AVDD
PVDD1 , PVDD2
Analog input pin voltage A
(VinA)
Min
Max
Units
Notes
−0.3
−0.3
2.2
4.2
V
V
–
−0.3
AVDD + 0.3 (≤2.2)
V
–
Digital input pin voltage D
(VinD)
−0.3
DVDD + 0.3 (≤2.2)
V
Digital output pin voltage P1
(VoutP)
−0.3
PVDD1 + 0.3 (≤4.2)
V
Digital input pin current P2
(VinP)
−0.3
PVDD2 + 0.3 (≤4.2)
V
XTI, XTO, CLKMD,
TEST0, TEST1
DTCLK, DATA[7:0], HD,
VD_F, DVALID_F, NSIG
OE, SELA, PDN, RSTN,
SDA, SCL
Input pin current (Iin)
−10
10
mA
–
(except for power supply pin)
Storage temperature
−40
125
˚C
–
The above supply voltages are referenced to ground pins (DVSS=AVSS) at 0 V (the Reference Voltage).
All power supply grounds (AVSS, DVSS) should be at the same electric potential.
If digital output pins are connected to data bus, the data bus operating voltage should be in the same
range as shown above for the digital output pin.
4.2 Recommended operating conditions
Parameter
Min
Analog supply voltage (AVDD)
1.70
Digital supply voltage (DVDD)
Typ
Max
Units
Condition
1.80
2.00
V
AVDD=DVDD
PVDD1≥DVDD
PVDD2≥DVDD
−40
–
105
˚C
AK8853XQ
Operating temp. (Ta)
−40
–
85
˚C
AK8853VN
The above supply voltages are referenced to ground pins (DVSS=AVSS) at 0 V (the Reference Voltage).
All power supply grounds (AVSS, DVSS) should be at the same electric potential.
I/O supply voltage (PVDD1)
MPU I/F supply voltage (PVDD2)
Rev-E-00
1.70
1.80
7
3.60
V
2008/01
[AK8853XQ/ VN]
4.3 DC characteristics
Where no specific condition is indicated in the following table, the supply voltage range
is the same as that shown for the recommended operating conditions in 4-2 above.
Parameter
Symbol
Min
Typ
Max
Units
Condition
0.8PVDD2
–
–
V
Case 1a
0.7PVDD2
–
–
V
Case 2b
–
–
0.2PVDD2
V
Case 1a
–
–
0.3PVDD2
V
Case 2b
VDIH
0.8DVDD
–
–
V
–
Digital D input low voltage
VDIL
–
–
0.2DVDD
V
–
Digital input leak current
IL
–
–
±10
uA
–
Digital output high voltage
VOH
0.7PVDD1
–
–
–
IOH = −600uA
Digital output low voltage
VOL
–
–
0.3PVDD1
–
IOL = 1mA
I2C (SDA)L output
VOLC
–
–
0.3 PVDD2
V
IOLC = 3mA
Digital P2 input high
voltage
VIH
Digital P2 input low
voltage
VIL
Digital D input high voltage
a
DVDD = 1.70V~2.00V, 1.70V≤PVDD1<2.70V, 1.70V≤PVDD2<2.70V, Ta: Recommended Operating Temp.
b
DVDD = 1.70V~2.00V, 2.70V≤PVDD1≤3.60V, 2.70V≤PVDD2≤3.60V, Ta: Recommended Operating Temp.
Definition of above input/output terms
Digital P2 input: Collective term for SDA, SCL, SELA, OE, PDN, RSTN pin inputs.
Digital D input: Collective term for CLKMD, TEST0, TEST1 pin inputs.
Digital output: Collective term for DTCLK, DATA[7:0], HD, VD_F, DVALID_F, NSIG pin outputs.
SDA pin output: Not termed digital pin output unless otherwise specifically stated.
Rev-E-00
8
2008/01
[AK8853XQ/ VN]
4.4 Analog characteristics (AVDD=1.8V, Temp.25˚C)
Selector clamp
Parameter
Maximum input range
Symbol
Min
Typ
Max
Units
VIMX
0
0.50
0.60
VPP
Symbol
Min
–
–
–
–
Typ
7
−6
6
0.094
Max
–
–
–
0.235
Units
bits
dB
dB
dB
Condition
Max value at minimum
PGA_GAIN setting
PGA
Parameter
Resolution
Minimum gain
Maximum gain
Gain step
AD converter
Parameter
Resolution
Operating clock
frequency
GMN
GMX
GST
Symbol
RES
Min
Typ
10
FS
–
27
Integral nonlinearity
INL
–
1.0
3.0
LSB
Differential nonlinearity
DNL
–
0.5
1.5
LSB
S/N
SN
–
53
–
dB
S/(N+D)
SND
–
51
–
dB
–
0.9
–
V
–
–
1.1
–
V
–
–
0.7
–
V
–
Min
Typ
Max
Units
Condition
−1
10
22
+1
–
dB
dB
6 MHz
27 MHz
ADC internal common
VCOM
voltage
ADC internal
VRP
positive VREF
ADC internal
VRN
negative VREF
*Fin = AIN input signal frequency
Max
–
Units
bits
Condition
–
MHz
–
FS = 27 MHz,
PGA_GAIN default setting
FS = 27 MHz,
PGA_GAIN default setting
Fin = 1 MHz*, FS = 27 MHz,
PGA_GAIN default setting
Fin=1MHz*, FS=27MHz
PGA_GAIN default setting
AAF (Anti-Aliasing Filter)
Parameter
Pass band ripple
Stop band blocking
Symb
ol
Gp
Gs
4.5 Current consumption (at DVDD = AVDD = PVDD1 = PVDD2 = 1.8V, Ta = Recommended Operating Temp.)
Parameter
Symbol Min
Typ
Max
Units
Condition
(Active mode)
a
Total
IDD
58
76
mA
Analog block
AIDD
35
mA
Digital block
DIDD
19
mA
With crystal connected
I/O block
PIDD
4
mA Load condition: CL=15pF
(Power down mode)
Total
SIDD
≤1
200
uA
Analog block
ASIDD
≤1
uA
Digital block
DSIDD
≤1
uA
I/O block
PSIDD
≤1
uA
a
With NTSC-J 100% color bar input.
Rev-E-00
9
2008/01
[AK8853XQ/ VN]
4.6 Crystal circuit block
(Ta: Recommended Operating Temp.)
Parameter
Symbol
Min
Typ
Max
Units
Notes
Frequency
f0
24.576
–
MHz
–
–
Frequency tolerance
Δf/f
±100
ppm
–
–
Load capacitance
CL
15
–
pF
–
–
Effective equivalent resistance
Re
–
100
Ω
See note 1
–
Crystal parallel capacitance
CO
0.9
pF
–
–
–
XTI terminal external
CXI
22
pF
If CL=15 pF
–
–
connection load capacitance
XTO terminal external
CXO
22
pF
If CL=15 pF
–
–
connection load capacitance
(note1) Effective equivalent resistance generally may be taken as Re = R1 x (1+CO/CL)2, where R1 is
the crystal series equivalent resistance.
Example connection
AK8853 internal circuit
Rf
XTI pin
XTO pin
External circuit
Rd (note2)
CXI = 22pF
CXO = 22pF
(note2) Determine need for and appropriate value of limiting resistance (Rd) in accordance with
the crystal specifications.
Rev-E-00
10
2008/01
[AK8853XQ/ VN]
5. AC timing (DVDD=1.70V~2.00V, PVDD1=PVDD2=1.70V~3.60V, Recommended Operating Temp.)
Load condition: CL=15pF
5.1 Clock input
Set AK8853 clock input as follows.
fCLK
tCLKL
tCLKH
0.8DVDD
1/2 level
0.2DVDD
Parameter
Input CLK
CLK pulse width H
CLK pulse width L
Frequency tolerance
Symbol
fCLK
tCLKH
tCLKL
–
Min
–
16
16
–
Typ
24.576
–
–
–
Max
–
–
–
±100
Units
MHz
ns
ns
ppm
5.2 Clock output (DTCLK output)
Parameter
DTCLK
Symbol
fDTCLK
Min
–
Typ
27
Max
–
Units
MHz
fDTCLK
0.5PVDD1
Rev-E-00
11
2008/01
[AK8853XQ/ VN]
5.3 Output data (DATA[7:0], HD, VD_F, DVALID_F) timing
0.5PVDD1
DTCLK
tDS
tDH
VOH
OUTPUT DATA
VOL
Parameter
Symbol
Min
Typ
Max
Units
Output Data Setup Time
tDS
10
nsec
Output Data Hold Time
tDH
10
nsec
5.4 Register reset timing
RSTN
VIL
RESETTIMING
fCLK
Parameter
Symbol
RSTN pulse width
RESETTIMING
Min
100
(4.1)
Typ
Max
–
–
Units
CLK
(µsec)
Notes
Based on clock leading edge
Note. Clock input is necessary for reset operation.
RSTN pin must be pulled low following clock application.
Rev-E-00
12
2008/01
[AK8853XQ/ VN]
5.5 Power-down sequence and Reset sequence after power-down
Reset must be applied for at least 2048 clock cycles (or 83.33 µs) before setting PDN (PDN=Low).
Reset must be applied for at least 10 ms after PDN release (PDN=Hi).
CLKIN
RSTN
RESh
RESs
VIH
VIL
VIH
PDN
GND
Parameter
Symbol
Reset width before setting PDN
RESs
Reset width after PDN release
RESh
Min
2048
(83.33)
Typ
Max
–
–
10
–
–
Units
CLK
(µs)
ms
To perform power-down, all control signals must always be brought to the voltage polarity to be used or
to ground level.
For any power supply removal, all power supplies must be removed.
Clock input is necessary for resetting.
The power-down sequence for connection of the crystal is as follows.
AVDD/DVDD
PVDD1/PVDD2
PDN
RSTN
XTI
VCOM,VRP,VRN
5 ms (max) to stable
crystal oscillation*
RESh ≥ 10ms(min)
* Reference value
PDN release
Rev-E-00
13
2008/01
[AK8853XQ/ VN]
5.6 Power-on reset
At power-on, reset must be applied until the analog reference voltage and current have stabilized.1
AVDD/DVDD/PVDD1/PVDD2 should be raised simultaneously at power-on.2
VDD
VIL
RSTN
VREF
Parameter
RSTN pulse width
RESPON
Symbol
RESPON
Min
10
Typ
Max
Units
ms
1
Clock input is necessary for resetting.
If not simultaneous, then raise in the order PVDD2 -> AVDD/DVDD -> PVDD1.
2
Rev-E-00
14
2008/01
[AK8853XQ/ VN]
5.7 I2C bus input timing (DVDD=1.70V~2.00V, PVDD1=PVDD2=1.70V~3.60V, Recommended Operating Temp.)
5.7.1 Timing 1
tBUF tHD : STA
tR
tF
tSU : STO
VIH
SDA
VIL
tF
tR
VIH
SCL
VIL
tLOW
tSU : STA
Parameter
Symbol
Min
Max
Units
Bus Free Time
tBUF
1.3
usec
Hold Time (Start Condition)
tHD:STA
0.6
usec
Clock Pulse Low Time
tLOW
1.3
usec
Input Signal Rise Time
tR
300
nsec
Input Signal Fall Time
tF
300
nsec
Setup Time(Start Condition)
tSU:STA
0.6
usec
Setup Time(Stop Condition)
tSU:STO
0.6
usec
Note. The timing relating to the I2C bus is as stipulated by the I2C bus specification,
and not determined by the device itself. For details, see I2C bus specification.
5.7.2 Timing 2
tHD : DAT
VIH
SDA
VIL
tHIGH
VIH
SCL
VIL
TSU : DAT
Parameter
1
2
Symbol
Min
Typ
1
Data Setup Time
tSU:DAT
100
Data Hold Time
tHD:DAT
0.0
Clock Pulse High Time
tHIGH
0.6
Units
nsec
0.92
usec
usec
If I2C is used in standard mode, tSU: DAT ≥ 250 ns is required.
This condition must be met if the AK8853 is used with a bus that does not extend tLOW (to use
tLOW at minimum specification).
Rev-E-00
15
2008/01
[AK8853XQ/ VN]
6. Functional overview
The following key functions are characteristic of the AK8853 and its operational performance.
(1)
It accepts composite video signal (CVBS) input, with 4 input pins available for this purpose. The
decode signal is selected via the register.
(2)
It contains an internal analog band limiting filter (anti-aliasing) in front of the AD converter input.
(3)
Its analog circuit clamps the input signal to the sync tip (analog sync tip clamp).
clamps the digitized input data to the pedestal level (digital pedestal clamp).
(4)
It decodes NTSC-M, J; NTSC-4.43; PAL-B, D, G, H, I, N; PAL-Nc, PAL-M, PAL-60; and SECAM
video signals, as selected by register setting for input signal category.
In auto detection mode, it automatically recognizes the input signal category.
(5)
Its VBI data slicing function enables output of the slicing results as ITU-R BT.601 format digital
data.
(6)
Its adaptive AGC function enables measurement of the input signal size and determination of the
input signal level.
(7)
Its ACC function enables measurement of the input signal color burst size and determination of the
appropriate color burst level.
(8)
It performs adaptive two-dimensional Y/C separation, in which its phase detector selects the best
correlation from among vertical, horizontal, and diagonal samples and the optimum Y/C separation
mode.
(9)
Its digital pixel spacing adjustor can align vertical positions by vertical pixel positioning.
Its digital circuit
(10) It operates in line-locked, frame-locked, or fixed clock mode, with automatic transition and optimum
mode selection by automatic scanning.
(11) In PAL-B, D, G, H, I, and N decoding, it can perform phase-difference correction for each line.
(12) Its decoded data is ITU-R BT.656 compliant, except in certain cases of fixed-clock operation or
poor-quality input signal.
(13) For connection of devices having no ITU-R BT.656 interface, it shows the active video region by
DVALID signal output.
(14) Its input-stage embedded PGA can be adjusted in the range -6~+6dB by register setting, in gain
steps of approximately 0.1 dB/step.
(15) It detects and separates the sync signal from the digitized input signal. The detected sync signal
provides the base timing for decode processing, and the separated sync signal as the basis for
calculation of phase error signal and for sampling clock control.
(16) It judges the chroma signal quality from the color burst of the input signal, and can apply color kill if
the signal quality is judged insufficient.
It can also apply color kill if the color decode PLL lock is lost.
(17) Its image quality adjustment function includes contrast, brightness, hue, color saturation, and
sharpness adjustment.
(18) Its luminance band limiting filter is adjustable via register setting.
(19) It can provide sepia output of decoded results.
(20) It can decode conflated closed caption data, closed caption extended data, VBID(CGMS), and
WSS signals, and write them separately to the storage register.
(21) Its monitoring register enables monitoring of a number of internal functions.
(22) It enables Macrovision signal type notification, in cases where the Macrovision signal is included in
the decoded data.
(23) It enables U/V signal band adjustment, by switching the low pass filter after C signal demodulating.
(24) It enables C filter band switching via the register, for Y/C separation.
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7. Functional description
7.1 Analog interface
The AK8853 accepts composite video signal (CVBS) input, with 4 input pins available for this purpose.
The decode signal is selected via the register.
INSEL[1:0]-bits
[00]
[01]
[10]
[11]
Input channel selection
AIN1
AIN2
AIN3
AIN4
Notes
7.2 Analog band limiting filter and analog clamp circuit
7.2.1 Analog band limiting filter
The characteristics of the AK8853 internal analog band limiting filter (anti-aliasing), which is in front of
the AD converter input, are as follows:
±1dB (~6MHz )
−22dB (27MHz)….Typical value
7.2.2 Analog clamp circuit
The analog circuit of the AK8853 clamps the input signal to the sync tip (analog sync tip clamp). The
clamp timing pulse, with its origin at the falling edge of the internally synchronized and separated sync
signal, is generated at approximately the central position of the sync signal. Its digital circuit clamps the
digitized input data to the pedestal level (digital pedestal clamp), as described in Sec. 7.20 below.
7.3 Input video signal categorization
The AK8853 can decode the following video signals, in accordance with the register setting.
NTSC-M,J
NTSC-4.43
PAL-B,D,G,H,I,N
PAL-Nc
PAL-M
PAL-60
SECAM
In auto detection mode, it automatically recognizes the input signal category, from among the above.
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The register settings for the input signal characterization are essentially as follows.
VSCF[1:0]-bits: Setting for subcarrier frequency of input signal.
VSCF[1:0]-bits
Subcarrier frequency (MHz)
[00]
3.57954545
[01]
3.57561149
[10]
3.58205625
[11]
4.43361875
Formats
NTSC-M,J
PAL-M
PAL-Nc
PAL-B, D, G, H, I, N, NTSC-4.43,
PAL-60, SECAM*
*For SECAM input signal, set VSCF[1:0] to [11].
VCEN[1:0]-bits: Setting for color encode format of input signal.
Color encode format
VCEN[1:0]-bits
[00]
NTSC
[01]
PAL
[10]
SECAM
[11]
Reserved
VLF-bit: Setting for line frequency of each input frame.
Number of lines
VLF-bit
[0]
525
[1]
625
Notes
Notes
NTSC-M, J, NTSC-4.43, PAL-M, PAL-60
PAL-B, D, G, H, I, N, Nc, SECAM
BW-bit: Setting for decoding of input signal as monochrome signal (monochrome mode)
Signal type
BW-bit
Not monochrome (monochrome mode OFF)
[0]
Decode as monochrome signal (monochrome mode ON)
[1]
In the monochrome mode, the input signal is treated as a monochrome signal, and all sampling data
digitized the the AD converter passes through the luminance process and is processed as a luminance
signal. Thus, with this bit ON, the signal input to the Y/C separation block is all output as luminance
signal data to the luminance signal processing block.
In the monochrome mode, the CbCr code is output as 0x80 (601 level data) regardless of the input.
SETUP-bit: Setting for presence or absence of input signal SETUP.
SETUP presence/absence
Notes
SETUP-bit
Setup absent
–
[0]
Setup present
7.5IRE Setup
[1]
With the Setup present setting, the luminance and color signals are processed as follows:
Luminance signal: Y=(Y-7.5)/0.925
Color signal: U=U/0.925, V=V/0.925
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The register settings for auto detection are essentially as follows.
AUTODET-bit: Settings for auto detection of input signal (auto detection mode)
Auto detection
Notes
AUTODET-bit
OFF
Manual setting
[0]
ON
–
[1]
The auto detection recognizes the following parameters.
Number of lines per frame: 525/625
Carrier frequencies: 3.57954545
3.57561149
3.58205625
4.43361875
Color encoding formats:
NTSC
PAL
SECAM
Monochrome signal: Not monochrome/monochrome
Note: Automatic monochrome detection is active if the color kill setting is ON (COLKILL-bit = [1].)
The AK8853 stores the detected parameter to the Input Video Status Register (thus, as an internal
notice function).
This enables the host to distinguish among the formats NTSC-M, J; NTSC-4.43; PAL-B, D, G, H, I, N;
PAL-M; PAL-Nc; PAL-60; SECAM; and monochrome.
It should be noted that it does not detect NTSC-M, NTSC-J, or PAL-B, D, G, H, I, N formats.
In auto detection, the candidates for detection can be limited as shown below.
NDMODE Register: For limiting auto detection candidates
Register
Bit
R/W
Name
Definition
bit 0
NDPALM
No Detect PAL-M bit
R/W
[0]: PAL-M candidate
[1]: PAL-M non-candidate
bit 1
NDPALNC
No Detect PAL-Nc bit
R/W
[0]: PAL-Nc candidate
[1]: PAL-Nc non-candidate
bit 2
NDSECAM
No Detect SECAM bit
R/W
[0]: SECAM candidate
[1]: SECAM non-candidate
bit 3
Reserved
Reserved
R/W
Reserved
bit 4
NDNTSC443
No Detect NTSC-4.43 bit
R/W
[0]: NTSC-4.43 candidate
[1]: NTSC-4.43 non-candidate
bit 5
NDPAL60
No Detect PAL-60 bit
R/W
[0]: PAL-60 candidate
[1]: PAL-60 non-candidate
bit 6
ND525L
No Detect 525Line bit
R/W
[0]: 525 line candidate
[1]: 525 line non-candidate
bit 7
ND625L
No Detect 625Line bit
R/W
[0]: 625 line candidate
[1]: 625 line non-candidate
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In making the above register settings, the following restrictions apply,
1. Setting both NDNTSC443(bit 4) and NDPAL60(bit 5) to [1] (High) is prohibited.
2. Setting both ND525L(bit 6) and ND625L(bit 7) to [1] (High) is prohibited.
3. To limit candidate formats, it is necessary to have the auto detection mode OFF while first
setting the register to non-limited signal status and next the NDMODE settings, and then setting
the auto detection mode to ON.
Set auto detection mode to OFF
Set Input Video Standard Register to non-limited signal status
Enter NDMODE Register Settings
Set auto detection mode to ON
7.4 Output data format
In the AK8853, the settings for the output code and the vertical blanking intervals for the output signal
are as follows.
VBIL[2:0]-bits: Settings for vertical blanking interval
VBIL[2:0]-bits
525/625 lines
Vertical blanking interval
Notes
525
Line1~Line20 and Line263.5~Line283.5
[001]
+1Line
625
Line623.5~Line23 and Line311~Line336.5
525
Line1~Line21 and Line263.5~Line284.5
[010]
+2Lines
625
Line623.5~Line24 and Line311~Line337.5
525
Line1~Line22 and Line263.5~Line285.5
[011]
+3Lines
625
Line623.5~Line25 and Line311~Line338.5
525
Line1~Line19 and Line263.5~Line282.5
[000]
Default
625
Line623.5~Line22 and Line311~Line335.5
525
Line1~Line16 and Line263.5~Line279.5
[101]
-3Lines
625
Line623.5~Line19 and Line311~Line332.5
525
Line1~Line17 and Line263.5~Line280.5
[110]
-2Lines
625
Line623.5~Line20 and Line311~Line333.5
525
Line1~Line18 and Line263.5~Line281.5
[111]
-1Line
625
Line623.5~Line21 and Line311~Line334.5
[100]
Reserved
Reserved
–
As indicated in this table, the default values are Lines 1~19 and 263.5~282.5 for 525-line signals and
Lines 623.5~22 and 311~335.5 for 625-line signals, and other specific values are set by entering the
difference from these default values.
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601LIMIT-bit: Settings for output data code Min/Max
Output data code Min~Max
Notes
601LIMIT-bit
Y: 1~254
[0]
Default
Cb, Cr: 1~254
Y: 16~235
[1]
Cb, Cr: 16~240
The AK8853 data code output format (Y:Cb:Cr=4:2:2) is compliant with ITU-R BT.601.
All internal calculating operations are made with Min = 1, Max = 254.
With 601LIMIT-bit set to [1], codes 1~15 and 236~254 are respectively clipped to 16,235.
TRSVSEL-bit: Settings for V-bit handling in ITU-R BT.656 format
525-line
625-line
TRSVSEL-bit
V-bit=0
V-bit=1
V-bit=0
V-bit=1
[0]
Line10~Line263
Line1~Line9
ITU-R BT 656-3
Line273~Line525
Line264~Line272
compliant
Line1~Line22
Line23~Line310
Line311~Line335
[1]
Line336~Line623
Line624~Line625
ITU-R BT 656-4
Line20~Line263
Line1~Line19
SMPTE125M
Line283~Line525
Line264~Line282
compliant
These values are unaffected by the VBIL[2:0]-bits setting.
SLLVL-bit: Settings for slice level
SLLVL-bit
Slice level
25IRE
[0]
50IRE
[1]
The results of VBI slicing by the AK8853 slicing function are output as ITU-R BT.601 digital data. The
VBI interval is set via VBIL[2:0]-bits. VBI slicing is performed in the luminance signal processing path,
so that the Cb/Cr value of the effective line 601 output code is output at the same level as the
corresponding luminance signal.
The slice level and the output code are set via the register. The output code value is set via the Hi/Low
Slice Data Set Register, as follows.
Hi Slice Data Set Register*:
Setting for higher of two values resulting from slicing.
Default: 0xEB(235)
Low Slice Data Set Register*: Setting for lower of two values resulting from slicing.
Default: 0x10(16)
*Note that a setting of 0x00 or 0xFF corresponds to a special 601 code.
VBIDEC[1:0]-bits: Settings for decode data in the VBI period
Decode data
VBIDEC[1:0]-bits
Notes
Y = 0x10
Black level output
[00]
Cb/Cr = 0x80
Y = data converted to 601 level
Monochrome mode
[01]
Cb/Cr = 0x80
Y/Cb/Cr = value corresponding to slice level
Sliced data output during VBI
[10]
(Value set at Hi/Low Slice Data Set Register)
Reserved
Reserved
[11]
Note that, with VBI period settings of Lines 1~9 and 263.5~272.5 in the 525 Line and Lines 623.5~6.5
and 311~318 in the 625 Line, the setting VBIDEC[1:0] will not be entered and the output will be in Black
level code.
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(mV*)
NTSC/PAL
601 Code
714/700
235
100% White
357/350
127
50IRE threshold with
setting SLLVL = [1]
180/175
63
25IRE threshold with
setting SLLVL = [0]
L:
H:
L
`````
L
Cb/Y
````
``````
L
L
Cr/Y
H
H
Cb/Y
````
``````
H
H
Cr/Y
L
Value set by Low Slice
Data Set Register
Value set by High Slice
Data Set Register
```````
*Threshold values (mV) are approximate.
High/Low conversion is performed for either the Cb/Y or the Cr/Y combination.
example of the conversion points for Cb/Y.
The above figure is an
7.5 Output pin status
For normal operation, the output from the DATA[7:0], VD_F, DVALID_F, NSIG, and HD pins can each
be fixed at Low via the Output Control Register. Note, however, that the OE, PDN, and RSTN pin
states will have priority regardless of these register settings.
7.6 VLOCK mechanism
The AK8853 synchronizes internal operation with the input signal frame structure. If, for example, the
frame structure of the input signal comprises 524 lines, the internal operation will have a structure of 524
lines per frame. This mechanism is termed the VLOCK mechanism. If an input signal changes from a
structure of 525 lines per frame to one of 524 lines per frame, internal operation will change accordingly,
and the VLOCK mechanism will go to UnLock via a pull-in process. In such case, the UnLock status
can be confirmed via the control register [VLOCK-bit]. Note that the time required for locking of the
VLOCK mechanism upon channel or other input signal switching will be about 4 frames.
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ACTSTA[2:0]-bits: Adjustment of active video start position
ACTSTA[2:0]-bits
Line and active video start
525 Line
124th sample
[001]
625 Line
134th sample
525 Line
125th sample
[010]
625 Line
135th sample
525 Line
126th sample
[011]
625 Line
136th sample
525 Line
123th sample
[000]
625 Line
133th sample
525 Line
120th sample
[101]
625 Line
130th sample
525 Line
121th sample
[110]
625 Line
131th sample
525 Line
122th sample
[111]
625 Line
132th sample
[100]
Reserved
Approximate delay/advance (ns)
74, delay
148, delay
222, delay
Default value (normal position)
222, advance
148, advance
74, advance
–
Reserved
With the default value, the start position is as follows (with ITU-R BT.601 format compliance).
OH
OH
122samples(525Line)
Active video start
132samples(625Line)
Active video start
7.7 Auto Gain Control_AGC
The AGC of the AK8853 measures the size of the input sync signal (i.e., the difference between the sync
tip and pedestal levels), and adjusts the PGA value to bring the sync signal level to 286a or 300b mV.
The AGC function amplifies the input signal to the appropriate size and enables input to the AD
converter. The AGC function in the AK8853 is adaptive, and thus includes peak AGC as well as sync
AGC. Peak AGC is effective for input signals in which the sync signal level is appropriate and only the
active video signal is large.
a
NTSC-M, J; NTSC-4.43; PAL-M
b
PAL-B, D, G, H, I, N; PAL-Nc; PAL-60; SECAM
AGCT[1:0]-bits: Settings for AGC time constant
Time constant
Notes
AGCT[1:0]-bits
[00]
Disable
AGC OFF, PGA register enabled.
[01]
Fast
T= 1Field
[10]
Middle
T= 7Fields
[11]
Slow
T= 29Fields
T is the time constant.
Manual setting of the PGA register is possible only if AGC is disabled.
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AGCC-bit: Settings for AGC non-sensing range
Non-sensing range
AGCC[1:0]-bits
[00]
±2LSB
[01]
±3LSB
[10]
±4LSB
[11]
None
Notes
–
–
–
–
AGCFRZ-bit: Settings for freezing AGC function
AGC status
Notes
AGCFRZ-bit
Non-frozen
–
[0]
Frozen
–
[1]
Note. The gain value at the time of freezing is maintained during the frozen state, and it is then
possible to read out the gain value via the PGA1,2 Control Register.
AGCTL-bit: Settings for selection of quick or slow transition between peak and sync AGC
AGC transition
Notes
AGCTL-bit
–
[0]
Quick
–
[1]
Slow
7.8 Auto Color Control_ACC
The ACC of the AK8853 measures the level of the input signal color burst, and adjusts the level to 286a
or 300b mV, as appropriate. The ACC is not applicable to SECAM. As in AGC, both ACC time
constant and ACC freeze settings can be entered.
a
NTSC-M,J, NTSC-4.43, PAL-M
b
PAL-B, D, G, H, I, N, PAL-Nc, PAL-60
ACCT[1:0]-bits: Settings for ACC time constant
Time constant
ACCT[1:0]-bits
[00]
Disable
[01]
Fast
[10]
Middle
[11]
Slow
Notes
ACC OFF
T= 2Fields
T= 8Fields
T= 30Fields
ACCFRZ-bit: Settings for freezing ACC function
ACC status
Notes
ACCFRZ-bit
Non-frozen
–
[0]
Frozen
–
[1]
Note. The burst-level setting at the time of freezing is maintained during the frozen state.
The ACC and Color saturation functions operate independently. If ACC is enabled, the color saturation
adjustment is applied to the signal that has been adjusted to the appropriate level by the ACC.
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7.9 Y/C separation
The adaptive two-dimensional Y/C separation of the AK8853 utilizes a correlation detector to select the
best-correlated direction from among vertical, horizontal, and diagonal samples, and selects the
optimum Y/C separation mode. For NTSC-4.43, PAL-60, and SECAM inputs, the Y/C separation is
one-dimensional only, regardless of the setting.
YCSEP[1:0]-bits: Settings for Y/C separation method
Y/C separation mode
YCSEP[1:0]-bits
Adaptive
[00]
1-D
[01]
Notes
Selects [01] or [10] setting, as appropriate
1D (BPF)
NTSC-M, J, PAL-M: 3 Line 2-D
2-D
[10]
PAL-B, D, G, H, I, N, Nc: 5 Line 2-D
Reserved
—
[11]
For NTSC-4.43, PAL-60, and SECAM inputs, Y/C separation is 1-D only, regardless of the setting.
7.10 C filter
The bandwidth of the C filter can be set via the register, as follows.
C358FIL[1:0]: Settings for C filter bandwidth, for input signal with 3.58 MHz subcarrier wave
C358FIL[1:0] -bits
Notes
Notes
[00]
Narrow
[01]
Medium
NTSC-M, J, PAL-M, PAL-Nc
[10]
Wide
[11]
Reserved
C443FIL[1:0]: Settings for C filter bandwidth, for input signal with 4.43 MHz subcarrier wave
C443FIL[1:0] -bits
Notes
Notes
[00]
Narrow
[01]
Medium
PAL-B, D, G, H, I, N, NTSC-4.43, PAL-60
[10]
Wide
[11]
Reserved
Note. No bandwidth selection is possible for SECAM input.
7.11 UV filter
The UV bandwidth can be changed by switching between two low pass filter types for the demodulated
C signal.
UVFILSEL-bit: Settings for UV filter switching
Bandwidth
UVFILSEL -bit
[0]
Wide
[1]
Narrow
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[AK8853XQ/ VN]
7.12 Digital Pixel Interpolator
The digital pixel interpolator of the AK8853 aligns vertical pixel positions in both frame-lock and
fixed-clock operating modes. The pixel interpolator can be set to ON or OFF via the register. With a
register setting of AUTO, the pixel interpolator is OFF or ON depending on the clock mode, as follows.
Line-locked clock mode
OFF
Frame-locked clock mode
ON
Fixed-clock mode
ON
INTPOL[1:0]-bits: Settings for pixel interpolator operation
Interpolator operation
INTPOL[1:0]-bits
Auto
[00]
[01]
ON
[10]
OFF
[11]
Reserved
Notes
Dependent on clock mode.
—
—
—
7.13 Clock generation
The AK8853 operates in the following three clock modes.
1. Line-locked clock mode
The “line-locked clock” is generated by PLL using the horizontal sync signal within the input
signal. If no input signal is present, the AK8853 will switch from this mode to fixed-clock mode.
2. Frame-locked mode
The “frame-locked clock” is generated by PLL using the vertical sync signal within the input
signal. If no input signal is present, the AK8853 will switch from this mode to fixed-clock mode.
3. Fixed-clock mode
No PLL control is applied in this mode, which is enabled only when either it is set via the register
or no input signal is present. In this mode, data capture cannot be performed in EAV (end
active video), and must be performed in SAV (start active video) format. The number of pixels
per line is not guaranteed in this mode, but data guarantee is performed in the interval from SAV
to EAV.
The AK8853 transition function automatically switches among the above modes and selects the optimum
one, and when no input signal is present switches to the fixed-clock mode.
In the line-locked and frame-locked clock modes, the clock is synchronized with the input signal and the
output is thus ITU-R BT.656 compliant. It should be noted, however, that ITU-R BT.656-compliant
output may not be possible with low-quality input signals.
It should also be noted that in the fixed-clock mode the sample number will be insufficient for ITU-R
BT.656 compliance, due to non-synchronization of the input data.
CLKMODE[1:0]-bits: Settings for selection of clock generation mode
Clock generation mode
CLKMODE[1:0]-bits
Automatic
[00]
Line-locked
[01]
Frame-locked
[10]
Fixed-clock
[11]
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Notes
—
—
—
—
2008/01
[AK8853XQ/ VN]
7.14 Phase correction
In PAL-B, D, G, H, I, N, Nc, 60, and M decoding, the AK8853 performs phase correction for each line.
With this function ON, color averaging is performed for each line. In the adaptive phase correction mode,
interline phase correlation is sampled and color averaging is performed for correlated samples.
Interline color averaging is also performed in NTSC-M and J decoding.
No phase correction or color averaging is performed in SECAM decoding.
DPAL[1:0]-bits: Settings for phase correction
Status
DPAL[1:0]-bits
Adaptive phase correction mode
[00]
Phase correction ON
[01]
Phase correction OFF
[10]
Reserved
[11]
Notes
—
—
—
—
7.15 No-signal output
If no input signal is found (as shown by the control bit NOSIG-bit), the output signal is black-level, blue
level (blueback), or input-state (sandstorm), depending on the register setting.
NSIGMD-bits: Settings for output signals for no input signal
Output
NSIGMD [1:0]-bits
Black-level
[00]
Blue-level (blueback)
[01]
Input-state (sandstorm)
[10]
Reserved
[11]
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Notes
—
—
—
—
2008/01
[AK8853XQ/ VN]
7.16 Output interface
7.16.1 656 interface
7.16.1.1 Line-locked and frame-locked clock modes
In both of these modes, the decoded data output is compliant with ITU-R BT.656, which
requires the following sample and line numbers.
Samples per line: 858 (525 line) or 864 (625 line)
Lines per frame: 525 or 625
It may not be possible, however, to meet these requirements if the input signal quality is poor.
In the AK8853, PLL is locked to the input signal and output-stage buffers absorb input signal jitter, but if
the jitter is excessive PLL tracking may be impracticable and ITU-R BT.656 compliance may thus be
lost.
In such cases, the following processing can be applied via the indicated register settings.
(a) Line drop/repeat processing
A line drop or line repeat will result in output signals with 524/624 or 526/626 lines per frame,
respectively. Line drop/repeat processing may be performed at any line in the frame.
(b) Pixel drop/repeat processing
A pixel drop or pixel repeat will result in output signals less or more than the required 858/864
samples in the last line of the frameor field, respectively.
Note: In the event of output-stage buffer failure, line drop/repeat processing will be performed
even if the register setting is for pixel drop/repeat processing.
ERRHND-bits: Settings for line and pixel drop/repeat processing
Processing mode
ERRHND-bits
[00]
Line Drop / Line Repeat
[01]
Pixel Drop / Pixel Repeat by Field
[10]
Pixel Drop / Pixel Repeat by Frame
[11]
Reserved
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28
Notes
Default
—
—
—
2008/01
[AK8853XQ/ VN]
7.16.1.2 Fixed-clock mode
In fixed-clock mode, operation is at an internally generated 27 MHz clock, from a 24.576 MHz input clock.
The output signal is therefore not synchronized with the input signal, and thus not ITU- BT.656 compliant.
Data is output in SAV format. As shown in the following figure, EAV is guaranteed for 720 pixels from
SAV, but the sample number from EAV to SAV is not.
SAV
EAV
720 pixels
858 / 864 ( NTSC / PAL ) pixels ± α
7.16.2 DVALID and timing signal interface
For connection with devices having no ITU-R.BT.656 interface, the AK8853 DVALID signal output
identifies the active video interval by remaining low throughout that period, as shown in the following
figure.
In fixed-clock mode, the internal clock is not synchronized with the output signal, but a space of 122/132
(NTSC/PAL) pixels is guaranteed between the horizontal sync signal and the start of the active video
interval.
122/132 Pixels
Video Signal
HSYNC
DVALID
CLK27MOUT
D[7:0]
Cb0
Y0
Cr0
Y1
Cb1
Y2
Cr1
Y3
‘’’’
Y718 Cr359 Y719
Active Video Start Position
（ 通 常
Rev-E-00
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[AK8853XQ/ VN]
The AK8853 outputs the following signals from the HD, VD_F, and DVALID_F pins, and the indicated
VD_F and DVALID_F output signals can also be selected via the register settings shown below.
Timing signal output pin
HD
525-line
Low for 4.7 µs at 15.734 kHz interval
VD_F
DVALID_F
625-line
Low for 4.7 µs at 15.625 kHz interval
Low during lines 1~3.5
and 313.5~315
Low during lines 4~6
and 266.5~269.5
VD
FIELD
ODD-Field: Low; EVEN-Field: High
DVALID
Active-Low
VFDSEL[1:0]-bits: Settings for VD/FIELD/DVALID selection
Pin output
VFDSEL[1:0]-bits
VD_F pin
DVALID_F pin
VD
signal
DVALID
signal
[00]
VD signal
Field signal
[01]
Field signal
DVALID signal
[10]
Reserved
Reserved
[11]
Output timing with 525-line input
CVBS
HD
523
524
525
1
2
3
4
5
6
7
8
9
10
11
VD
FIELD
ODD
EVEN
CVBS
261
HD
262
263
264
265
266
267
268
269
270
271
272
274
273
VD
ODD
FIELD
EVEN
Output timing with 625-line input
CVBS
HD
620
621
622
623
624
625
1
2
3
4
5
6
7
8
VD
FIELD
CVBS
HD
VD
FIELD
ODD
EVEN
308
309
310
311
312
313
ODD
314
315
316
317
318
319
320
321
EVEN
The output signal polarities of the DTCLK, HD, VD_F and DVALID_F pins can be reversed via “Output
Control Register” and “Control 0 Register” settings.
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[AK8853XQ/ VN]
7.17 Automatic setup processing
In auto detection mode, the AK8853 can perform automatic setup processing in accordance with the
detected signal. The automatic setup selection is made via the STUPATOFF-bit register, as shown in the
table below.
Setup processing of the signal to be decoded consists of the following.
Luminance signal: Y=(Y-7.5)/0.925
Color signal:
U=U/0.925, V=V/0.925
Automatic setup processing
Detected signal
NTSC-M, J
PAL-B, D, G, H, I, N
PAL-Nc, 60
SECAM
(AK8853 in auto detection mode)
Register setting
STUPATOFF-bit
Setup-bit
(Automatic setup processing)
Detected signal setup
processing status
[0]
Disabled
[1]
Disabled
[0]
Enabled
[1]
Enabled
[0]
Enabled
[1]
Disabled
[0]
Enabled
[1]
Enabled
[0]
[1]
[0]
PAL-M
NTSC-4.43
[1]
In the auto detection mode, the setup processing status will be determined by the register setting on the
basis of the detected signal category, with no detection as to the presence or absence of input signal
setup.
7.18 PGA (programmable gain amp)
The PGA, located in the input stage of the AK8853, can be set in a gain range of -6~6 dB in gain steps
of 0.1 dB.
PGA[7:0]-bits: Sets the PGA value.
This register can read the AGC setting value.
If AGC is enabled, the PGA[7:0]-bits setting value has no effect, and the PGA setting can be
manually entered in the register only if AGC is disabled.
Signal input to the AK8853 should be made with the input level attenuated approximately 39%
(-8.19 dB) by resistance splitting.
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[AK8853XQ/ VN]
7.19 Sync separation, sync detection, and black-level fine tuning
The AK8853 performs sync separation and sync detection on the digitized input signal, uses the
detected sync signal as the timing reference for the decoding process, and calculates the phase error
from the separated sync signal and applies it to control of the sampling clock.
Black-level tuning can be performed in the sync separation block. The black-level fine-tuning band,
which is 10 bits wide before REC 601 conversion, can be adjusted -8~+7 LSB in 1-LSB steps, with one
step resulting in a change of about 0.4 LSB in the output code.
BKLVL[3:0]-bits: Settings for black-level fine tuning
BKLVL[3:0]-bits
Code adjustment of black level
Approx. change in 601 level (LSB)
[0001]
+1
+0.4
[0010]
+2
+0.8
[0011]
+3
+1.2
[0100]
+4
+1.6
[0101]
+5
+2.0
[0110]
+6
+2.4
[0111]
+7
+2.8
[0000]
Default
None
[1000]
−8
−3.2
[1001]
−7
−2.8
[1010]
−6
−2.4
[1011]
−5
−2.0
[1100]
−4
−1.6
[1101]
−3
−1.2
[1110]
−2
−0.8
[1111]
−1
−0.4
The black level is adjusted upward or downward by the value of the setting, which must be in
2’s-complement form. Black-level adjustment is also enabled during the vertical blanking interval.
7.20 Digital pedestal clamp
The digitally converted input signal is clamped in the digital signal processing block. The internal clamp
position depends on the input signal type (either 286 mV sync or 300 mV sync), but pedestal position is
output as code 16 for both types. The digital pedestal clamp function can adjust the time constant and
set the coring level.
DPCT[1:0]-bits: Settings for digital pedestal clamp time constant
Transition time constant
Notes
DPCT[1:0]-bits
—
[00]
Fast
—
[01]
Middle
—
[10]
Slow
[11]
Disable
Digital pedestal clamp OFF
DPCC[1:0]-bits: Settings for digital clamp pedestal coring level
Transition time constant (bit)
DPCC[1:0]-bits
[00]
±1
[01]
±2
[10]
±3
Non-coring
[11]
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Notes
—
—
—
—
2008/01
[AK8853XQ/ VN]
7.21 Color killer
The chroma signal quality of the input signal is determined by comparison of its color burst level against
the threshold setting in the color killer control register. If the level is below the threshold, the color killer
is activated, resulting in processing of the input as a monochrome signal and thus with CbCr data fixed
at 0x80. Depending on the register setting, the color killer may also be activated by failure of the color
decode PLL lock.
COLKILL-bit: Settings for color killer ON and OFF
COLKILL-bit
[0]
Enable
[1]
Disable
Notes
—
—
CKLVL[3:0]-bits: For threshold setting; default setting [1000] = −23dB.
CKSCM[1:0]-bits: Used for threshold setting with SECAM input; expands 2-bit for CKLVL[3:0]-bit
CKILSEL: Settings for color killer activation
Condition for activation
CKILSEL-bit
Burst level below threshold setting in CKLVL[3:0]-bits
[0]
Burst level below threshold setting in CKLVL[3:0]-bits, or
[1]
Failure of color decode PLL lock
Notes
—
—
7.22 Image quality adjustments
Image quality adjustments consist of contrast, brightness, sharpness, color saturation, and hue
adjustment. All image quality adjustments are disabled during the vertical blanking interval, but contrast
and brightness adjustment can be enabled by the register setting.
7.22.1 Contrast adjustment
CONT[7:0]-bits: For contrast adjustment; default value 0x80 (no adjustment)
Contrast adjustment involves multiplication by the gain factor setting in this register. The equation
of the multiplication can be modified by register setting as follows.
If CONTSEL = [0], then YOUT = (CONT/128) x (YIN – 128) + 128
If CONTSEL = [1], then YOUT = (CONT/128) x YIN
YOUT: Contrast obtained by the calculation
YIN: Contrast before the calculation
CONT: Contrast gain factor (register setting value)
The gain factor can be set in the range 0~255. If the calculated value is outside the specified
contrast range, it is clipped to the upper ‘254’ or lower ‘1’ limit. With a control bit 601LIMIT setting of
[1], the output will be in the range 16~235.
CONTSEL-bit: Settings for contrast adjustment Inclination
CONTSEL -bit
Inclination
Toward luminance of 128
[0]
Toward luminance of 0
[1]
Rev-E-00
33
Notes
—
—
2008/01
[AK8853XQ/ VN]
7.22.2 Brightness adjustment
BR[7:0]-bits: For brightness adjustment; settings in 2’s complement;
default value 0x00 (no adjustment)
Brightness adjustment involves multiplication of the 8Bit data luminance signal, after ITU-R BT.601
conversion, by the gain factor setting in this register, as follows.
YOUT = YIN + BR
YOUT: Brightness obtained by the calculation
YIN: Brightness before the calculation
BR: Brightness gain factor (register setting value)
The gain factor can be set in the range -127 to +127 in steps of 1, by 2’s complement entry. If the
calculated value is outside the specified contrast range, it is clipped to the upper ‘254’ or lower ‘1’ limit.
With a control bit 601LIMIT setting of [1], the output will be in the range 16~235.
7.22.3 Color saturation adjustment
SAT[7:0]-bits: For color saturation adjustment; default value 0x80 (no adjustment)
Saturation adjustment involves multiplication of the color signal by the gain factor setting in this
register. The calculated result is U/V demodulated.
The gain factor can be set in the range 0 to 255/128, in steps of 1/128.
7.22.4 Hue adjustment
HUE[7:0]-bits: For hue adjustment; settings in 2’s complement; default value 0x00 (no adjustment)
The AK8853 can perform hue rotation with a phase rotation range of ±45° in steps of about
0.35°.
7.22.5 Sharpness adjustment
Sharpness adjustment is performed on the luminance signal as shown in the following process diagram.
The filter characteristics and the coring level can be selected by following register. A sharp image can be
obtained by selection of the filter with the appropriate characteristics.
Luminance signal
before processing
SHARP[1:0]-bits
SHCORE[1:0]-bits
Filter
Coring
Luminance signal
after processing
Delay
SHARP[1:0]-bits: Settings for filter characteristics selection
Filter characteristics
SHARP[1:0]-bits
No filtering
[00]
[01]
Min
[10]
Middle
[11]
Max
SHCORE[1:0]-bits: Settings for coring level after sharpness filtering
Coring level (LSB)
SHCORE[1:0]-bits
No coring
[00]
±1
[01]
±2
[10]
±3
[11]
Rev-E-00
34
Notes
Filter disabled
—
—
—
Notes
Settings apply only to
filtered signal.
2008/01
[AK8853XQ/ VN]
VBIIMGCTL-bit: Settings for brightness and contrast adjustment status (ON/OFF) during VBI
Status during VBI
Notes
VBIIMGCTL -bit
Disabled
—
[0]
Enabled
—
[1]
7.23 Luminance bandwidth adjustment
Luminance bandwidth adjustment can be performed for MPEG compression etc. The band-limiting filters
for pre-compression limiting can be selected by the following register settings. Without these filters, the
frequency response of the luminance signal is determined by the decimation filter.
LUMFIL[1:0]-bits: Settings for luminance bandwidth filter
Filter characteristic
LUMFIL[1:0]-bits
[00]
No filter
[01]
Narrow
[10]
Mid
[11]
Wide
Notes
-3 dB at 6.29 MHz
-3dB at 2.94MHz
-3dB at 3.30MHz
-3dB at 4.00MHz
7.24 Sepia output
Sepia-colored output of the decoded signal can be obtained by the following register setting.
SEPIA-bit: Settings for sepia output of decoded signal
Output
SEPIA –bit
Normal
[0]
Sepia
[1]
Notes
—
—
7.25 VBI information decoding
The AK8853 decodes closed-caption, closed-caption-extended, VBID(CGMS), and WSS signals on the
vertical blanking signal, and writes the decoded data into a storage register. The AK8853 reads each
data bit in Request VBI Information Register(R/W)-[3:0] as a decoding request and thereupon enters a
data wait state. Data detection and decoding to the storage register are then performed which
indicates the presence or absence of data at STATUS 2 Register-[3:0] for host. The host can therefore
determine the stored values by reading the respective storage registers. The value in each storage
register is retained until a new value is written in by data renewal. For VBID data (CGMS-A), the CRCC
code is decoded and only the arithmetic result is stored in the register.
Signal type
Superimposed line
line
Closed Caption
Line21 (NTSC-M, J, NTSC-4.43, PAL-M, 60)
525
Closed Caption Extended Data
Line284 (NTSC-M, J, NTSC-4.43, PAL-M, 60)
525
Line20 / 283 (NTSC-M, J, NTSC-4.43, PAL-M, 60)
525
VBID
Line20 / 333 (PAL-B, D, G, H, I, N, Nc, SECAM)
625
WSS
Line23 (PAL-B, D, G, H, I, N, Nc, SECAM)
625
The storage registers for each of the signal types are as follows. For storage bit allocations, please refer
to the respective register setting descriptions.
Closed Caption 1 Register, Closed Caption 2 Register
WSS 1 Register, WSS 2 Register
Extended Data 1 Register, Extended Data 2 Register
VBID 1 Register, VBID 2 Register
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[AK8853XQ/ VN]
7.26 Internal status indicators
The AK8853 shows the internal status, with the following bit allocation.
NOSIG-bit: Indicates presence or absence of signal
Status of signal input
NOSIG –bit
Signal detected
[0]
No signal detected
[1]
Notes
—
—
VLOCK-bit: Indicates status of VLOCK
Status of synchronization
VLOCK-bit
Synchronized
[0]
Non-synchronized
[1]
Notes
—
—
COLKILON: Indicates status of color killer
Status of color killer
COLKILON –bit
Operation
[0]
Not-operation
[1]
Notes
—
—
SCLKMODE-bits: Indicates status of clock mode
Clock mode
SCLKMODE –bits
Fixed-clock
[00]
Line-locked
[01]
Frame-locked
[10]
Reserved
[11]
Notes
—
—
—
—
PKWHITE: Indicates status of luminance decode result after passage through AGC block
Status of luminance decode result
Notes
PKWHITE –bit
Normal
—
[0]
Overflow
—
[1]
OVCOL: Indicates status of color decode result after passage through ACC block
Status of color decode result
OVCOL –bit
Normal
[0]
Overflow
[1]
Notes
—
—
Status 2-Ragister: Indicates closed caption, extended data, VBID, and WSS signal status, with decoding
field status shown in REALFLD-bit and adaptive AGC status in AGCSTS-bit.
Rev-E-00
REALFLD -bit
[0]
[1]
Decoding field
Even
Odd
Notes
—
—
AGCSTS -bit
[0]
[1]
Status of AGC operation
Sync AGC operation
Peak AGC operation
Notes
—
—
36
2008/01
[AK8853XQ/ VN]
Macrovision Status-Register: Indicates Macrovision signal type, if decoded data contains Macrovision
signal
Bit
Register Name
Description
Definition
bit 0
AGCDET
AGC Process Detect
bit 1
CSDET
Color Stripe Detect
bit 2
CSTYPE
Color Stripe Type
[0]: No Macrovision AGC process detected
[1]: Macrovision AGC process detected
[0]: No Macrovision Color Stripe process detected
[1]: Macrovision Color Stripe process detected
[0]: Color Stripe Type 2 in input signal
[1]: Color Stripe Type 3 in input signal
Input Video Status-Register: Indicates status of automatic input signal detection
Register
BIT
Status
Indication
Name
Input signal subcarrier frequency:
[ST_VSCF1: ST_VSCF0] (MHz)
bit 0 ST_VSCF0
[00]: 3.57954545 (NTSC-M, J)
Status of Video
~
~
[01]: 3.57561149 (PAL-M)
Sub-Carrier Frequency
bit 1 ST_VSCF1
[10]: 3.58205625 (PAL-Nc)
[11]: 4.43361875 (PAL-B, D, G, H, I, N, 60;
NTSC-4.43, SECAM*)
Input signal color encode format:
[ST_VCEN1: ST_VCEN0]
bit 2 ST_VCEN0
Status of Video
[00]: NTSC
~
~
Color Encode
[01]: PAL
bit 3 ST_VCEN1
[10]: SECAM
[11]: Reserved
Input signal line frequency
Status of Video
[0]: 525 line (NTSC-M, J; NTSC-4.43, PAL-M, 60)
bit 4
ST_VLF
Line Frequency
[1]: 625 line (PAL-B, D, G, H, I, N, Nc; SECAM)
Input signal monochrome or non-monochrome1:
[0]: Non-monochrome detected
bit 5
ST_BW
Status of B/W Signal
[1]: Monochrome
Input signal presence or absence2:
[0]: Input signal detected
bit 6
UNDEF
Un_define bit
[1]: No input signal detected
Input signal detection phase3:
Input Video Standard
[0]: Input signal search in progress
bit 7
FIXED
fixed bit
[1]: Input signal search complete
*If input signal is identified as SECAM, ST_VSCF[1:0] changes to [11].
1
Monochrome auto detection is enabled if the color killer setting is ON(COLKILL-bit = [1]).
ST_BW-bit changes to [1] when the color killer operates.
If the user has deliberately entered the B/W-bit setting Sub Address 0x01, input signal detection
is limited to 525/625 line detection, and only the ST_VLF information is relevant.
2
Shows results of input signal detection.
If an input signal is detected, the value is [0]; if no input signal is detected, the value is [1].
3
Shows the operating phase of the automatic input signal detector.
The value is [0] while the detection operation is in progress, and [1] when it is completed;
thus, when UNDEF-bit = [1], FIXED-bit = [0].
Rev-E-00
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[AK8853XQ/ VN]
The VBI information storage registers are as follows.
Closed Caption 1 Register
bit 7
bit 6
CC7
CC6
Closed Caption 2 Register
bit 7
bit 6
CC15
CC14
WSS 1 Register
bit 7
bit 6
G2-7
G2-6
WSS 2 Register
bit 7
bit 6
Reserved Reserved
Extended Data 1 Register
bit 7
bit 6
EXT7
EXT6
Extended Data 2 Register
bit 7
bit 6
EXT15
EXT14
VBID 1 Register
bit 7
bit 6
Reserved Reserved
VBID 2 Register
bit 7
bit 6
VBID7
VBID8
Rev-E-00
bit 5
CC5
bit 4
CC4
bit 3
CC3
bit 2
CC2
bit 1
CC1
bit 0
CC0
bit 5
CC13
bit 4
CC12
bit 3
CC11
bit 2
CC10
bit 1
CC9
bit 0
CC8
bit 5
G2-5
bit 4
G2-4
bit 3
G1-3
bit 2
G1-2
bit 1
G1-1
bit 0
G1-0
bit 5
G4-13
bit 4
G4-12
bit 3
G4-11
bit 2
G3-10
bit 1
G3-9
bit 0
G3-8
bit 5
EXT5
bit 4
EXT4
bit 3
EXT3
bit 2
EXT2
bit 1
EXT1
bit 0
EXT0
bit 5
EXT13
bit 4
EXT12
bit 3
EXT11
bit 2
EXT10
bit 1
EXT9
bit 0
EXT8
bit 5
VBID1
bit 4
VBID2
bit 3
VBID3
bit 2
VBID4
bit 1
VBID5
bit 0
VBID6
bit 5
VBID9
bit 4
VBID10
bit 3
VBID11
bit 2
VBID12
bit 1
VBID13
bit 0
VBID14
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[AK8853XQ/ VN]
8. Device control interface
The AK8853 is controlled via I2C bus control interface, as described below.
8.1 I2C bus SLAVE Address
The I2C slave address can be selected by a SELA pin setting of either [1000100] or [1000101].
Slave Address
SELA pin status
MSB
Pulldown [Low]
Pullup [High]
1
1
LSB
0
0
0
0
0
0
1
1
0
0
0
1
R/W
R/W
8.2 I2C Control Sequence
8.2.1 Write sequence
After receiving a write-mode slave address first byte, the AK8853 receives the sub-address in the
second byte and data in the subsequent bytes. The write sequence may be single-byte or multi-byte.
Single-byte write sequence
Slave
S
Address
w A
1bit
8-bits
Sub
Address
A
Data
A
8-bits
1bit
8-bits
1bit
Multi-byte write sequence (m-bytes, sequential write operation)
Sub
Slave
Data
S
w A Address A Data(n) A
Address
(n+1)
(n)
1118-bits
8-bits
8-bits
8-bits
bit
bit
bit
A
Stp
‘’’’’’’
1bit
Data
(n+m)
A
8-bits
1bit
stp
8.2.2 Read sequence
After receiving a read-mode salve address as the first byte, the AK8853 sends data in the second and
subsequent bytes.
Slave
Sub
Slave
Data
S Addres w A Address A rS
R A Data1 A
A Data3 A
Address
2
‘’’‘’
s
(n)
8-bits
1
8-bits
1
8-bits
1
8-bits
1
8-bits 1
8-bits
1
’‘’’’’‘’’
Data
n
!A
8-bits
1
‘’‘
stp
Symbols and abbreviations
S: Start Condition
rS: repeated Start Condition
A: Acknowledge (SDA Low)
!A: Not Acknowledge (SDA High)
stp: Stop Condition
R/W: 1: Read; 0: Write
: Received from master device (normally microprocessor)
: Output by slave device (AK8853)
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[AK8853XQ/ VN]
9. Register Definitions
Sub
Address
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
0x0F
0x10
0x11
0x12
0x13
0x14
0x15
0x16
0x17
0x18
0x19
0x1A
0x1B
0x1C
0x1D
0x1E
0x1F
0x20
0x21
0x22
Rev-E-00
Register
AFE Control Register
Input Video Standard Register
Output Format Regsiter
NDMODE Register
Output Control Register
Start and Delay Control Register
AGC & ACC Control Register
Control 0 Register
Control 1 Register
Control 2 Register
PGA Control Register
Reserved Register
Pedestal Level Control Register
Color Killer Control Register
Contrast Control Register
Brightness Control Register
Image Control Register
Saturation Control Register
HUE Control Register
High Slice Data Set Register
Low Slice Data Set Register
Request VBI Infomation Register
Status 1 Register
Status 2 Register
Macrovision Status Register
Input Video Status Register
Closed Caption 1 Register
Closed Caption 2 Register
WSS 1 Register
WSS 2 Register
Extended Data 1 Register
Extended Data 2 Register
VBID 1 Register
VBID 2 Register
Device and Revision ID Register
Default
R/W
Function
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x3E
0x00
0x00
0x08
0x80
0x00
0x00
0x80
0x00
0xEB
0x10
0x00
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
R
Analog front-end setting
Input video signal format setting
Output data format setting
Auto detection limit setting
Output pin status setting
Output data setting
AGC and ACC setting
Control register type
Control register type
Control register type
PGA gain setting
Reserved
Pedestal level adjustment
Color killer setting
Contrast adjustment
Brightness adjustment
Image control setting
Saturation adjustment
Hue adjustment
VBI slicer data high setting
VBI slicer data low setting
VBI interval decode request setting
Internal status indicator
Internal status indicator
Input Macrovision signal indicator
Input signal detection indicator
Closed caption data indicator
Closed caption data indication
WSS data indicator
WSS data indicator
Closed caption extended data indicator
Closed caption extended data indicator
VBID data indicator
VBID data indicator
Device ID and revision ID indicator
40
2008/01
[AK8853XQ/ VN]
Sub
Address
0x23
0x24
0x25
0x26
0x27
0x28
0x29
0x2A
0x2B
0x2C
0x2D
0x2E
0x2F
0x30
0x31
0x32
0x33
0x34
0x35
0x36
0x37
0x38
0x39
0x3A
0x3B
0x3C
0x3D
0x3E
0x3F
Register
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Default
R/W
Function
0x08
0x01
0x00
0x00
0x00
0x00
0x3A
0x00
0x00
0x00
0x00
0x84
0x7C
0x3C
0x0A
0x00
0x00
0x40
0x5D
0xA9
0x7B
0xDD
0x00
0x00
0x08
0x08
0x00
0x00
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
Reserved register
For all other registers, write-in is prohibited.
For all reserved registers, write-in must be limited to the default value.
Rev-E-00
41
2008/01
[AK8853XQ/ VN]
10. Register settings overview
AFE Control Register (R/W) [Sub Address 0x00], for input signal selection
Sub Address 0x00
bit 7
bit 6
Reserved
Reserved
Default Value
0
0
bit 5
Reserved
bit 4
Reserved
bit 3
Reserved
bit 2
Reserved
Default Value : 0x00
bit 1
bit 0
INSEL1
INSEL0
0
0
0
0
0
AFE Control Register Definition
Register
Bit
Name
R/W
Definition
bit 0
~
bit 1
INSEL0
~
INSEL1
Input Select
R/W
Input video signal selection:
[00]: AIN1 (CVBS)
[01]: AIN2 (CVBS)
[10]: AIN3 (CVBS)
[11]: AIN4 (CVBS)
bit 2
~
bit 7
Reserved
Reserved
R/W
Reserved
Rev-E-00
42
0
2008/01
[AK8853XQ/ VN]
Input Video Standard Register (R/W) [Sub Address 0x01], for input signal selection
Sub Address 0x01
bit 7
bit 6
AUTODET
SETUP
Default Value
0
0
bit 5
BW
bit 4
VLF
bit 3
VCEN1
bit 2
VCEN0
Default Value : 0x00
bit 1
bit 0
VSCF1
VSCF0
0
0
0
0
0
Input Video Standard Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 1
VSCF0
~
VSCF1
Video Sub-Carrier
Frequency
R/W
bit 2
~
bit 3
VCEN0
~
VCEN1
Video Color Encode
R/W
bit 4
VLF
Video Line Frequency
R/W
bit 5
BW
Black & White
R/W
bit 6
SETUP
Setup
R/W
bit 7
AUTODET
Video Standard Auto Detect
R/W
0
Definition
Input video signal subcarrier frequency setting
[VSCF1: VSCF0] (MHz)
[00]: 3.57954545 (NTSC-M,J)
[01]: 3.57561149 (PAL-M)
[10]: 3.58205625 (PAL-Nc)
[11]: 4.43361875
(PAL-B,D,G,H,I,N,60 , NTSC-4.43 , SECAM*)
Input signal color ecode format setting
[VCEN1: VCEN0]
[00]: NTSC
[01]: PAL
[10]: SECAM
[11]: Reserved
Input signal line frequency setting
[0]: 525line (NTSC-M,J , NTSC-4.43 , PAL-M,60)
[1]: 625 line (PAL-B, D, G, H, I, N, PAL-Nc, SECAM)
Monochrome mode (ON/OFF) setting
[0]: Monochrome mode OFF
[1]: Monochrome mode ON
Setup process setting
[0]: Process as input signal with no setup
[1]: Process as input signal with setup
Input signal auto detection setting
[0]: OFF (auto detection disabled; set manually)
[1]: ON (auto detection enabled)
*For SECAM input signal, change VSCF[1:0] setting to [11].
Rev-E-00
43
2008/01
[AK8853XQ/ VN]
Output Format Register (R/W) [Sub Address 0x02], for output data format setting
Sub Address 0x02
bit 7
bit 6
VBIDEC1
VBIDEC0
Default Value
0
0
bit 5
SLLVL
bit 4
TRSVSEL
bit 3
601LIMIT
bit 2
VBIL2
Default Value : 0x00
bit 1
bit 0
VBIL1
VBIL0
0
0
0
0
0
Output Format Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 2
VBIL0
~
VBIL2
Vertical Blanking Length
R/W
bit 3
601LIMIT
601 Output Limit
R/W
bit 4
TRSVSEL
Time Reference Signal
V Select Bit
R/W
bit 5
SLLVL
Slice Level
R/W
bit 6
~
bit 7
VBIDEC0
~
VBIDEC1
VBI Decode
R/W
Rev-E-00
44
0
Definition
Vertical blanking interval length setting, entered as
difference from the default settings
The default settings are:
525-line: Lines1~ 19 and 263.5~282.5
625-line: Lines 623.5~22 and 311~335.5
Examples of lengthening and shortening:
If lengthened 1 line, the interval becomes
525-line: Lines1~20 and 263.5~283.5
625-line: Lines 623.5~23 and 311~336.5
If shortened 1 line, the interval becomes
525-line: Lines1~18 and 263.5~281.5
625-line: Lines 623.5~21 and 311~334.5
[VBIL2: VBIL0]
[001]: VBI lengthened 1 line
[010]: VBI lengthened 2 lines
[011]: VBI lengthened 3 lines
[000]: Default
[101]: VBI shortened 3 lines
[110]: VBI shortened 2 lines
[111]: VBI shortened 1 line
[100]: Reserved
Output data code limit (Min-Max) setting
[0]: 1-254 (Y/Cb/Cr)
[1]: 16-235 (Y) /16-240 (Cb/Cr)
Setting of lines for “Time reference signal” V-bit
value change in ITU-R BT.656 format
With 525-line input
Setting [0]: V=1 (lines 1~9 and 264~272)
V=0 (lines 10~263 and 273~525)
Setting [1]: V=1 (lines 1~19 and 264~282)
V=0 (lines 20~263 and 283~525)
With 625-line input
Always (regardless of setting in this register):
V=1 (lines 1~22 and 311~335)
V=0 (lines 23~310 and 336~623)
Slice level setting
[0]: Slice level approx. 25 IRE
[1]: Slice level approx. 50 IRE
Setting for type of data output during interval set in
Vertical Blanking Interval register
[ VBIDEC1: VBIDEC0 ]
[00]: Black level data output
[01]: Monochrome data output
[10]: Slice result data output
[11]: Reserved
2008/01
[AK8853XQ/ VN]
NDMODE Register (R/W) [Sub Address 0x03], for limiting auto input video signal detection candidates
Sub Address 0x03
bit 7
bit 6
ND625L
ND525L
Default Value
0
0
bit 5
NDPAL60
bit 4
NDNTSC443
bit 3
Reserved
bit 2
NDSECAM
Default Value: 0x00
bit 1
bit 0
NDPALNC NDPALM
0
0
0
0
0
NDMODE Register Definition
Register
Bit
Name
R/W
Definition
bit 0
NDPALM
No Detect PAL-M bit
R/W
[0]: PAL-M candidate
[1]: PAL-M non-candidate
bit 1
NDPALNC
No Detect PAL-Nc bit
R/W
[0]: PAL-Nc candidate
[1]: PAL-Nc non-candidate
bit 2
NDSECAM
No Detect SECAM bit
R/W
[0]: SECAM candidate
[1]: SECAM non-candidate
bit 3
Reserved
Reserved
R/W
Reserved
bit 4
NDNTSC443
No Detect NTSC-4.43 bit
R/W
[0]: NTSC-4.43 candidate
[1]: NTSC-4.43 non-candidate
bit 5
NDPAL60
No Detect PAL-60 bit
R/W
[0]: PAL-60 candidate
[1]: PAL-60 non-candidate
bit 6
ND525L
No Detect 525Line bit
R/W
[0]: 525 line candidate
[1]: 525 line non-candidate
bit 7
ND625L
No Detect 625Line bit
R/W
[0]: 625 line candidate
[1]: 625 line non-candidate
0
In making the above register settings, the following restrictions apply,
1. Setting both NDNTSC443(bit 4) and NDPAL60(bit 5) to [1] (High) is prohibited.
2. Setting both ND525L(bit 6) and ND625L(bit 7) to [1] (High) is prohibited.
3. To limit candidate formats, it is necessary to have the auto detection mode OFF while first
setting the register to non-limited signal status and next the NDMODE settings, and then setting
the auto detection mode to ON.
Rev-E-00
45
2008/01
[AK8853XQ/ VN]
Output Control Register (R/W) [Sub Address 0x04], for output pin output status setting
Sub Address 0x04
bit 7
bit 6
CLKINV
DVALID_FSEL
Default Value
0
0
Bit
bit 5
VD_FSEL
bit 4
HL
bit 3
NL
bit 2
DVALID_FL
Default Value: 0x00
bit 1
bit 0
VD_FL
DL
0
0
0
0
0
Output Control Register Definition
Register Name
R/W
0
Definition
[0]: Normal output
[1]: [D7: D0] pin output fixed at Low
bit 0
DL
D Output Low bit
R/W
bit 1
VD_FL
VD/FIELD Low bit
R/W
[0]: Normal output
[1]: VD_F pin output fixed at Low
bit 2
DVALID_FL
DVALID/FIELD Low bit
R/W
[0]: Normal output
[1]: DVALID_F pin output fixed at Low
bit 3
NL
NSIG Low bit
R/W
[0]: Normal output
[1]: NSIG pin output fixed at Low
bit 4
HL
HD Low bit
R/W
[0]: Normal output
[1]: HD pin output fixed at Low
bit 5
VD_FSEL
VD/FIELD Select bit
R/W
VD_F pin output signal selection
[0]: VD signal output
[1]: FIELD signal output
bit 6
DVALID_FSEL
DVALID/FIELD Select bit
R/W
DVALID_F pin output signal selection
[0]: DVALID signal output
[1]: FIELD signal output
R/W
DTCLK signal output polarity selection
[0]: Normal output
(write in data at rising edge)
[1]: Data and clock reversed
(write in data at falling edge)
bit 7
CLKINV
CLK Invert Set bit
Note: Output control via pins OE, PDN, and RSTN takes priority, regardless of the above settings.
Rev-E-00
46
2008/01
[AK8853XQ/ VN]
Start and Delay Control Register (R/W) [Sub Address 0x05], for data output setting
Sub Address 0x05
bit 7
bit 6
Reserved
ACTSTA2
Default Value
0
0
bit 5
ACTSTA1
bit 4
ACTSTA0
bit 3
Reserved
bit 2
Reserved
Default Value: 0x00
bit 1
bit 0
Reserved
Reserved
0
0
0
0
0
Start and Delay Control Register Definition
Register
Bit
Name
bit 0
Reserved
Reserved
~
bit 3
R/W
Definition
R/W
Reserved
bit 4
~
bit 6
ACTSTA0
~
ACTSTA2
Active Video Start Control bit
R/W
bit 7
Reserved
Reserved
R/W
Rev-E-00
47
0
Fine-tuning video data decode start position
by delay or advance in 1-sample units 1
sample clock (13.5 MHz; approx. 74 ns)
[ACTSTA2: ACTSTA0]
[001]: 1-sample delay
[010]: 2-sample delay
[011]: 3-sample delay
[000]: Normal start position
[101]: 3-sample advance
[110]: 2-sample advance
[111]: 1-sample advance
[100]: Reserved
Reserved
2008/01
[AK8853XQ/ VN]
AGC & ACC Control Register (R/W) [Sub Address 0x06], for AGC and ACC setting
Sub Address 0x06
bit 7
bit 6
ACCFRZ
ACC1
Default Value
0
0
bit 5
ACC0
bit 4
AGCFRZ
bit 3
AGCC1
bit 2
AGCC0
Default Value: 0x00
bit 1
bit 0
AGCT1
AGCT0
0
0
0
0
0
AGC Control Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 1
AGCT0
~
AGCT1
AGC Time Constant
R/W
bit 2
~
bit 3
AGCC0
~
AGCC1
AGC Coring Control
R/W
bit 4
AGCFRZ
AGC Freeze
R/W
bit 5
~
bit 6
ACC0
~
ACC1
ACC Time Constant
R/W
bit 7
ACCFRZ
ACC Freeze
R/W
Rev-E-00
48
0
Definition
AGC time constant (T) setting
(if disabled, PGA can be set manually)
[AGCT1: AGCT0]
[00]: Disable
[01]: Fast [T = 1 field]
[10]: Middle [T = 7 fields]
[11]: Slow [T = 29 fields ]
AGC non-sensing bandwidth (LSB) setting
[AGCC1: AGCC0]
[00]: ±2 LSB
[01]: ±3 LSB
[10]: ±4 LSB
[11]: No non-sensing band
AGC freeze function (ON/OFF) setting
(AGC set values are saved during freeze)
[0]: Non-frozen
[1]: Frozen
ACC time constant (T) setting
[ACCT1: ACCT0]
[00]: Disable
[01]: Fast [T = 2Fields]
[10]: Middle [T =8Fields]
[11]: Slow [T = 30Fields]
ACC freeze function (ON/OFF) setting
(ACC set values are saved during freeze)
[0] : Non-frozen
[1] : Frozen
2008/01
[AK8853XQ/ VN]
Control 0 Register (R/W) [Sub Address 0x07], for the following function setting
Sub Address 0x07
bit 7
bit 6
DVALID_FP
VD_FP
Default Value
0
0
bit 5
HDP
bit 4
C443FIL0
bit 3
C443FIL0
bit 2
C358FIL1
Default Value: 0x00
bit 1
bit 0
C358FIL0
AGCTL
0
0
0
0
0
Control 0 Register Definition
Register
Bit
Name
R/W
bit 0
AGCTL
AGC Transition Level
R/W
bit 1
~
bit 2
C358FIL0
~
C358FIL1
C Filter_358 Select bit
R/W
bit 3
~
bit 4
C443FIL0
~
C443FIL1
C Filter_443 Select bit
R/W
bit 5
HDP
HD Pin Polarity Set bit
R/W
bit 6
VD_FP
VD_F Pin Polarity Set bit
R/W
bit 7
DVALID_FP
DVALID_F Pin Polarity Set bit
R/W
Rev-E-00
49
0
Definition
Transition speed setting, between peak AGC
and sync AGC
[0]: Quick
[1]: Slow
C-filter bandwidth setting, for 3.58 MHz
subcarrier system signal
[C358FIL1: C358FIL0]
[00]: 3.58 Narrow
[01]: 3.58 Medium
[10]: 3.58 Wide
[11]: Reserved
C-filter bandwidth setting, for 4.43 MHz
subcarrier system signal
[C443FIL1: C443FIL0]
[00]: 4.43 Narrow
[01]: 4.43 Medium
[10]: 4.43 Wide
[11]: Reserved
HD signal polarity setting
[0]: Active Low
[1]: Active High
VD_F pin output polarity setting
If in VD signal output mode
[0]: Active Low
[1]: Active High
If in field signal output mode
[0]: Odd-Field Low, Even-Field High
[1]: Even-Field Low, Odd-Field High
DVALID_F pin output signal polarity setting
If in DVALID signal output mode
[0]: Active Low
[1]: Active High
If in field signal output mode
[0]: Odd-field Low, Even-field High
[1]: Even-field Low, Odd-field High
2008/01
[AK8853XQ/ VN]
Control 1 Register (R/W) [Sub Address 0x08], for the following function setting
Sub Address 0x08
bit 7
bit 6
CLKMODE1 CLKMODE0
Default Value
0
0
bit 5
INTPOL1
bit 4
INTPOL0
bit 3
Reserved
bit 2
UVFILSEL
Default Value: 0x00
bit 1
bit 0
YCSEP1
YCSEP0
0
0
0
0
0
Control 1 Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 1
YCSEP0
~
YCSEP1
YC Separation Control
R/W
bit 2
UVFILSEL
UV Filter Select
R/W
bit 3
Reserved
Reserved
R/W
bit 4
~
bit 5
INTPOL0
~
INTPOL1
Interpolator Mode Select
R/W
bit 6
~
bit 7
CLKMODE0
~
CLKMODE1
Clock Mode Select
R/W
Rev-E-00
50
0
Definition
Y/C separation setting
[YCSEP1: YCSEP0]
[00]: Adaptive Y/C separation
[01]: 1-dimensional Y/C separation
[10]: 2-dimensional Y/C separation
[11]: Reserved
UV filter bandwidth setting
[0]: Wide
[1]: Narrow
Reserved
Pixel interpolator setting
[INTPOL1: INTPOL0]
[00]: Auto
[01]: ON
[10]: OFF
[11]: Reserved
Clock mode setting
[CLKMODE1: CLKMODE0]
[00]: Automatic transition mode
[01]: Line-locked clock mode
[10]: Frame-locked clock mode
[11]: Fixed-clock mode
2008/01
[AK8853XQ/ VN]
Control 2 Register (R/W) [Sub Address 0x09], for the following function setting
Sub Address 0x09
bit 7
bit 6
CKILSEL
STUPATOFF
Default Value
0
0
bit 5
ERRHND1
bit 4
ERRHND0
bit 3
NSIGMD1
bit 2
NSIGMD0
Default Value: 0x00
bit 1
bit 0
DPAL1
DPAL0
0
0
0
0
0
Control 2 Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 1
DPAL0
~
DPAL1
Deluxe PAL
R/W
bit 2
~
bit 3
NSIGMD0
~
NSIGMD1
No Signal Output Mode
R/W
bit 4
~
bit 5
ERRHND0
~
ERRHND1
656 Error Handling
R/W
bit 6
STUPATOFF
Setup Auto Control Off
R/W
bit 7
CKILSEL
Color killer Select
R/W
Rev-E-00
51
0
Definition
Setting for color averaging
(PAL phase correction block)
Also applicable to NTSC.
[DPAL1: DPAL0]
[00]: Adaptive phase correction ON
[01]: Phase correction ON
[10]: Phase correction OFF
[11]: Reserved
Setting for output on no-signal detection
[NSIGMD1: NSIGMD0]
[00]: Black-level output
[01]: Blue-level (Blueback) output
[10]: Input status (sandstorm) output
[11]: Reserved
Setting for processing if ITU-R Bt.656 output
is not possible
[ERRHND1: ERRHND0]
[00]: Line drop or repeat
[01]: Pixel drop or repeat, in final line of field
[10]: Line drop or repeat, in final line of frame
[11]: Reserved
Setup auto switching setting (ON/OFF) in
auto signal detection mode
[0]: Auto setup switching ON
[1]: Auto setup switching OFF
Color killer activation setting
[0]: Activation when burst color level is below
CKLVL[3:0]-bits threshold setting
[1]: Activation when burst color level is below
CKLVL[3:0]-bits threshold setting or
color decode PLL lock fails
2008/01
[AK8853XQ/ VN]
PGA Control Register (R/W) [Sub Address 0x0A], for PGA gain setting
Sub Address 0x0A
bit 7
bit 6
Reserved
PGA_6
Default Value
0
0
bit 5
PGA_5
1
bit 4
PGA_4
bit 3
PGA_3
1
bit 7
Reserved
bit 2
PGA_2
1
PGA Control Register Definition
Register
Bit
Name
PGA_0
bit 0
PGA Gain Set
~
~
PGA_6
bit 6
Reserved
Default Value: 0x3E
bit 1
bit 0
PGA_1
PGA_0
1
1
0
R/W
Definition
R/W
PGA gain setting, in steps of approx. 0.1 dB
R/W
Reserved
Reserved Register (R/W) [Sub Address 0x0B]
Sub Address 0x0B
bit 7
bit 6
Reserved
Reserved
Default Value
0
0
Rev-E-00
bit 5
Reserved
bit 4
Reserved
bit 3
Reserved
bit 2
Reserved
Default Value: 0x00
bit 1
bit 0
Reserved
Reserved
0
0
0
0
0
52
0
2008/01
[AK8853XQ/ VN]
Pedestal Level Control Register (R/W) [Sub Address 0x0C], for pedestal level adjustment setting
Sub Address 0x0C
bit 7
bit 6
DPCC1
DPCC0
Default Value
0
0
bit 5
DPCT1
bit 4
DPCT0
bit 3
BKLVL3
bit 2
BKLVL2
Default Value: 0x00
bit 1
bit 0
BKLVL1
BKLVL0
0
0
0
0
0
Pedestal Level Control Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 3
BKLVL0
~
BKLVL3
Black Level
R/W
bit 4
~
bit 5
DPCT0
~
DPCT1
Digital Pedestal Clamp
Control
R/W
bit 6
~
bit 7
DPCC0
~
DPCC1
Digital Pedestal Clamp
Coring Control
R/W
Rev-E-00
53
0
Definition
Setting for change from current pedestal
level by adding to or subtracting from black
level
[BKLVL3: BKLVL0]
[0001]: Add 1
[0010]: Add 2
[0011]: Add 3
[0100]: Add 4
[0101]: Add 5
[0110]: Add 6
[0111]: Add 7
[0000]: Default
[1000]: Subtract 8
[1001]: Subtract 7
[1010]: Subtract 6
[1011]: Subtract 5
[1100]: Subtract 4
[1101]: Subtract 3
[1110]: Subtract 2
[1111]: Subtract 1
Time-constant setting for digital pedestal
clamp
[DPCT1: DPCT0]
[00]: Fast
[01]: Middle
[10]: Slow
[11]: Disable
Non-sensing bandwidth setting for digital
pedestal clamp
[DPCC1: DPCC0]
[00]: ±1bit
[01]: ±2bits
[10]: ±3bits
[11]: No non-sensing band
2008/01
[AK8853XQ/ VN]
Color Killer Control Register (R/W) [Sub Address 0x0D], for color killer setting
Sub Address 0x0D
bit 7
bit 6
COLKILL
CONTSEL
Default Value
0
0
bit 5
CKSCM1
bit 4
CKSCM0
bit 3
CKLVL3
bit 2
CKLVL2
Default Value: 0x08
bit 1
bit 0
CKLVL1
CKLVL0
0
0
1
0
0
0
Color Killer Control Register Definition
Register
Bit
Name
bit 0
CKLVL0
Color Killer Level Control
~
~
bit 3
CKLVL3
bit 4
CKSCM0
~
~
Color Killer Level for SECAM
bit 5
CKSCM1
R/W
Definition
R/W
Burst level setting for color killer activation
Default value, approx. −23 dB
bit 6
CONTSEL
Contrast Select bit
R/W
bit 7
COLKILL
Color killer Set
R/W
Rev-E-00
54
R/W
Burst level setting for color killer activation in
SECAM mode
Adds 2 bits to CKLVL[3:0]
Contrast selector
[0]: toward luminance of 128
[1]: toward luminance of 0
Color killer ON/OFF setting
[0]: Enable
[1]: Disable
2008/01
[AK8853XQ/ VN]
Contrast Control Register (R/W) [Sub Address 0x0E], for contrast adjustment
Sub Address 0x0E
bit 7
bit 6
CONT7
CONT6
Default Value
1
0
bit 5
CONT5
bit 4
CONT4
bit 3
CONT3
bit 2
CONT2
Default Value: 0x80
bit 1
bit 0
CONT1
CONT0
0
0
0
0
0
Contrast Control Register Definition
Register
Bit
Name
bit 0
CONT0
Contrast Control
~
~
bit 7
CONT1
0
R/W
Definition
R/W
Register for contrast adjustment in steps of
1/128 in range 1~255/128 from default
value of 0x80
Brightness Control Register (R/W) [Sub Address 0x0F], for brightness adjustment
Sub Address 0x0F
bit 7
bit 6
BR7
BR 6
Default Value
0
0
bit 5
BR 5
bit 4
BR 4
bit 3
BR 3
bit 2
BR 2
bit 1
BR 1
0
0
0
0
0
Brightness Control Register Definition
Register
Bit
Name
BR0
bit 0
Brightness Control
~
~
BR7
bit 7
Rev-E-00
55
Default Value: 0x00
bit 0
BR 0
0
R/W
Definition
R/W
Register for brightness adjustment in steps
of 1 by 8-bit code setting in 2’s complement
2008/01
[AK8853XQ/ VN]
Image Control Register (R/W) [Sub Address 0x10] for adjustment image
Sub Address 0x10
bit 7
bit 6
VBIIMGCTL SEPIA
Default Value
0
0
bit 5
LUMFIL1
bit 4
LUMFIL0
bit 3
SHCORE1
bit 2
SHCORE0
Default Value: 0x00
bit 1
bit 0
SHARP1
SHARP0
0
0
0
0
0
Image Control Register Definition
Register
Bit
Name
R/W
bit 0
~
bit 1
SHARP0
~
SHARP1
Sharpness Control
R/W
bit 2
~
bit 3
SHCORE0
~
SHCORE1
Sharpness Coring
R/W
bit 4
~
bit 5
LUMFIL0
~
LUMFIL1
Luminance Filter
R/W
bit 6
SEPIA
Sepia Output
R/W
bit 7
VBIIMGCTL
VBI Image Control
R/W
Rev-E-00
56
0
Definition
Sharpness control (filter effect) setting
[SHARP1: SHARP0]
[00]: No filtering
[01]: Min effect
[10]: Middle effect
[11]: Max effect
Setting for level of coring after passage
through sharpness filter
Enabled except with [SHARP1:SHARP0]
register setting of [00]
[SHCORE1: SHCORE0]
[00]: No coring
[01]: ±1 LSB
[10]: ±2 LSB
[11]: ±3 LSB
Setting for luminance band limit filter
[LUMFIL1: LUMFIL0]
[00]: No filtering
[01]: Narrow
[10]: Mid
[11]: Wide
Setting (ON/OFF) for sepia coloring of decode
results
[0]: Normal output
[1]: Sepia output
Setting (ON/OFF) for image adjustment during
brightness and contrast adjustment VBI
[0]: Image adjustment inactive during VBI
[1]: Image adjustment active during VBI
2008/01
[AK8853XQ/ VN]
Saturation Control Register (R/W) [Sub Address 0x11], for saturation level adjustment
Sub Address 0x11
bit 7
bit 6
SAT 7
SAT 6
Default Value
1
0
bit 5
SAT 5
bit 4
SAT 4
bit 3
SAT 3
bit 2
SAT 2
Default Value: 0x80
bit 1
bit 0
SAT 1
SAT 0
0
0
0
0
0
Saturation Control Register Definition
Register
Bit
Name
bit 0
SAT0
Saturation Control
~
~
bit 7
SAT7
0
R/W
Definition
R/W
Register for saturation level adjustment in
steps of 1/128 in range 1~255/128 from
default value of 0x80
HUE Control Register (R/W) [Sub Address 0x12], for hue adjustment
Sub Address 0x12
bit 7
bit 6
HUE 7
HUE 6
Default Value
0
0
bit 5
HUE 5
bit 4
HUE 4
bit 3
HUE 3
bit 2
HUE 2
Default Value: 0x00
bit 1
bit 0
HUE 1
HUE 0
0
0
0
0
0
HUE Control Register Definition
Register
Bit
Name
HUE0
bit 0
HUE Control
~
~
HUE7
bit 7
Rev-E-00
57
0
R/W
Definition
R/W
Register for hue adjustment in steps of
1/128 in range ±45° in 2’s complement
2008/01
[AK8853XQ/ VN]
High Slice Data Set Register (R/W) [Sub Address 0x13], for VBI slicer
Sub Address 0x13
bit 7
bit 6
H7
H6
Default Value
1
1
bit 5
H5
bit 4
H4
bit 3
H3
bit 2
H2
Default Value: 0xEB
bit 1
bit 0
H1
H0
1
0
1
0
1
High Slice Data Set Register Definition
Register
Bit
Name
bit 0
~
bit 7
H0
~
H7
High Data 0~7 Set
1
R/W
Definition
R/W
Register for setting sliced data from VBI slicer
to High value (Default code is 235)
Important: Corresponds to 601 special code if
set to 0x00 or 0xFF
Low Slice Data Set Register (R/W) [Sub Address 0x14], for VBI slicer
Sub Address 0x14
bit 7
bit 6
L7
L6
Default Value
0
0
bit 5
L5
bit 4
L4
bit 3
L3
bit 2
L2
bit 1
L1
0
1
0
0
0
Low Slice Data Set Register Definition
Register
Bit
Name
bit 0
~
bit 7
L0
~
L7
Rev-E-00
Low Data 0~7 Set
58
Default Value: 0x10
bit 0
L0
0
R/W
Definition
R/W
Register for setting sliced data from VBI slicer
to Low value (Default code is 16)
Important: Corresponds to 601 special code if
set to 0x00 or 0xFF
2008/01
[AK8853XQ/ VN]
Request VBI Infomation Register (R/W) [Sub Address 0x15], for data decode during VBI interval
Sub Address 0x15
bit 7
bit 6
Reserved
Reserved
Default Value
0
0
bit 5
Reserved
bit 4
Reserved
bit 3
WSSRQ
bit 2
VBIDRQ
Default Value: 0x00
bit 1
bit 0
EXTRQ
CCRQ
0
0
0
0
0
Request VBI Infomation Register Definition
Register
Bit
Name
R/W
bit 0
CCRQ
Closed Caption
Decode Request
bit 1
EXTRQ
Extended Data
Decode Request
R/W
bit 2
VBIDRQ
VBID Decode Request
R/W
bit 3
WSSRQ
WSS Decode Request
R/W
bit 4
~
bit 7
Reserved
Reserved
R/W
Rev-E-00
59
R/W
0
Definition
Setting (ON/OFF) for closed caption decode
request
[0]: No request (OFF)
[1]: Request (ON)
Setting (ON/OFF) for Extended Data decode
request
[0]: No request (OFF)
[1]: Request (ON)
Setting (ON/OFF) for VBID decode request
[0]: No request (OFF)
[1]: Request (ON)
Setting (ON/OFF) for WSS decode request
[0]: No request (OFF)
[1]: Request (ON)
Reserved
2008/01
[AK8853XQ/ VN]
Status 1 Register (R) [Sub Address 0x16] for shows AK8853 internal status
Sub Address 0x16
bit 7
bit 6
OVCOL
PKWHITE
bit 5
SCLKMODE1
bit 4
SCLKMODE0
Status 1 Register Definition
Register
Bit
Name
bit 0
NOSIG
No Signal
bit 3
COLKILON
bit 2
FRMSTD
bit 1
VLOCK
R/W
Definition
R
Input signal indicator
[0]: Input signal present
[1]: Input signal absent
bit 0
NOSIG
bit 1
VLOCK
Video Locked
R
Input signal VLOCK synchronization status
indicator
[0]: Input signal synchronized
[1]: Input signal non-synchronized
bit 2
FRMSTD
Frame Standard
R
Input signal interlace status indicator
[0]: Input signal 525/625 interlaced
[1]: Input signal not 525/625 interlaced
bit 3
COLKILON
Color Killer
R
Color killer status indicator
[0]: Color killer not operation
[1]: Color killer operation
R
Clock mode indicator
[SCLKMODE1: SCLKMODE0]
[00]: Fixed-clock mode
[01]: Line-locked clock mode
[10]: Frame-locked clock mode
[11]: Reserved
R
Luminance decode result flow status
indicator, after passage through AGC block
[0]: Normal
[1]: Overflow
R
Color decode result flow status indicator,
after passage through ACC block
[0]: Normal
[1]: Overflow (excessive color signal input)
bit 4
~
bit 5
bit 6
bit 7
SCLKMODE0
~
Clock Mode
SCLKMODE1
PKWHITE
OVCOL
Rev-E-00
Peak White Detection
Over Color Level
60
2008/01
[AK8853XQ/ VN]
Status 2 Register (R) [Sub Address 0x17] for shows AK8853 internal status
Sub Address 0x17
bit 7
bit 6
Reserved
Reserved
bit 5
AGCSTS
bit 4
Reserved
bit 3
WSSDET
Status 2 Register Definition
Register
Bit
Name
bit 0
bit 1
bit 2
CCDET
EXTDET
VBIDDET
Closed Caption Detect
Extended Data Detect
VBID Data Detect
bit 2
VBIDDET
bit 1
EXTDET
bit 0
CCDET
R/W
Definition
R
Indicator for presence of decoded data in
Closed Caption 1 2 Register
[0]: No closed caption data present
[1]: Closed caption Data present
R
Indicator for presence of decoded data in
Extended Data 1,2 Register
[0]: No extended data present
[1]: Extended data present
R
Indicator for presence of decoded data in
VBID 1,2 Register
[0]: No VBID data present
[1]: VBID data present
bit 3
WSSDET
WSS Data Detect
R
Indicator for presence of decoded data in
WSS 1,2 Register
[0]: No WSS data present
[1]: WSS data present
bit 4
REALFLD
Real Field
R
Input signal field status (even/odd) indicator
[0]: EVEN field
[1]: ODD field
bit 5
AGCSTS
AGC Status bit
R
[0]: Sync AGC active
[1]: Peak AGC active
bit 6
~
bit 7
Reserved
Reserved
R
Reserved
Rev-E-00
61
2008/01
[AK8853XQ/ VN]
Macrovision Status Register (R) [Sub Address 0x18] for Macrovision Status
Sub Address 0x18
bit 7
bit 6
Reserved
Reserved
bit 5
Reserved
bit 4
Reserved
Macrovision Status Register Definition
Register
Bit
Name
bit 0
bit 1
AGCDET
CSDET
AGC Process Detect
Color Stripe Detect
bit 3
Reserved
bit 2
CSTYPE
bit 1
CSDET
bit 0
AGCDET
R/W
Definition
R
Indicator for presence of Macrovision AGC
in input signal
[0]: No Macrovision AGC present
[1]: Macrovision AGC present
R
Indicator for presence of Macrovision Color Stripe
in input signal
[0]: No Color Stripe present
[1]: Color Stripe present
bit 2
CSTYPE
Color Stripe Type
R
Indicator for type of Color Stripe included in input signal
[0]: Color Stripe Type 2
[1]: Color Stripe Type 3
bit 3
~
bit 7
Reserved
Reserved
R
Reserved
Rev-E-00
62
2008/01
[AK8853XQ/ VN]
Input Video Status Register (R) [Sub Address 0x19] for auto detection mode
Sub Address 0x19
bit 7
bit 6
FIXED
UNDEF
bit 5
ST_B/W
bit 4
ST_VLF
Input Video Status Register Definition
Register
BIT
Name
bit 3
ST_VCEN1
R/W
bit 0
~
bit 1
ST_VSCF0
~
ST_VSCF1
Status of Video Sub-Carrier
Frequency
R
bit 2
~
bit 3
ST_VCEN0
~
ST_VCEN1
Status of Video Color Encode
R
bit 4
ST_VLF
Status of
Video Line Frequency
R
bit 5
ST_BW
Status of B/W Signal
R
bit 6
UNDEF
Un_define bit
R
bit 7
FIXED
Input Video Standard fixed bit
R
bit 2
ST_VCEN0
bit 1
ST_VSCF1
bit 0
ST_VSCF0
Definition
Input video signal subcarrier frequency indicator
[ST_VSCF1: ST_VSCF0] ( MHz )
[00]: 3.57954545 (NTSC-M,J)
[01]: 3.57561149 (PAL-M)
[10]: 3.58205625 (PAL-Nc)
[11]: 4.43361875
(PAL-B,D,G,H,I,N,60 , NTSC-4.43 , SECAM*)
Input signal color encode format indicator
[ST_VCEN1: ST_VCEN0]
[00]: NTSC
[01]: PAL
[10]: SECAM
[11]: Reserved
Input signal line number indicator
[0]: 525-line(NTSC-M,J , NTSC-4.43 , PAL-M,60)
[1]: 625-line (PAL-B,D,G,H,I,N,Nc , SECAM)
Input signal monochrome indicator
[0]: Not monochrome
[1]: Monochrome
Input signal detection indicator
[0]: Input signal detected
[1]: Input signal not detected
Input signal detection process status
[0]: Detection process in progress
[1]: Detection process completed
*If SECAM input signal is detected, ST_VSCF[1:0] goes to [11].
Rev-E-00
63
2008/01
[AK8853XQ/ VN]
Closed Caption 1 Register (R) [Sub Address 0x1A]
Closed Caption data storage register
Sub Address 0x1A
bit 7
bit 6
bit 5
CC7
CC6
CC5
bit 4
CC4
bit 3
CC3
bit 2
CC2
bit 1
CC1
bit 0
CC0
bit 3
CC11
bit 2
CC10
bit 1
CC9
bit 0
CC8
bit 3
G1-3
bit 2
G1-2
bit 1
G1-1
bit 0
G1-0
bit 3
G4-11
bit 2
G3-10
bit 1
G3-9
bit 0
G3-8
bit 3
EXT3
bit 2
EXT2
bit 1
EXT1
bit 0
EXT0
bit 3
EXT11
bit 2
EXT10
bit 1
EXT9
bit 0
EXT8
bit 3
VBID3
bit 2
VBID4
bit 1
VBID5
bit 0
VBID6
bit 3
VBID11
bit 2
VBID12
bit 1
VBID13
bit 0
VBID14
Closed Caption 2 Register (R) [Sub Address 0x1B]
Closed Caption data storage register
Sub Address 0x1B
bit 7
bit 6
bit 5
CC15
CC14
CC13
bit 4
CC12
WSS 1 Register (R) [Sub Address 0x1C]
WSS data storage register
Sub Address 0x1C
bit 7
bit 6
bit 5
G2-7
G2-6
G2-5
bit 4
G2-4
WSS 2 Register (R) [Sub Address 0x1D]
WSS data storage register
Sub Address 0x1D
bit 7
bit 6
bit 5
Reserved Reserved G4-13
bit 4
G4-12
Extended Data 1 Register (R) [Sub Address 0x1E]
Closed Caption Extended data storage register
Sub Address 0x1E
bit 7
bit 6
bit 5
bit 4
EXT7
EXT6
EXT5
EXT4
Extended Data 2 Register (R) [Sub Address 0x1F]
Closed Caption Extended data storage register
Sub Address 0x1F
bit 7
bit 6
bit 5
bit 4
EXT15
EXT14
EXT13
EXT12
VBID 1 Register (R) [Sub Address 0x20]
VBID data storage register
Sub Address 0x20
bit 7
bit 6
bit 5
Reserved Reserved VBID1
bit 4
VBID2
VBID 2 Register (R) [Sub Address 0x21]
VBID data storage register
Sub Address 0x21
bit 7
bit 6
bit 5
VBID7
VBID8
VBID9
Rev-E-00
bit 4
VBID10
64
2008/01
[AK8853XQ/ VN]
Device and Revision ID Register (R) [Sub Address 0x22]
Device ID and Revision indicator
Device ID: [0x35]
Revision ID: Initially 0x00; revision number changes only when control software should be modified.
Sub Address 0x22
bit 7
bit 6
REV1
REV0
Default Value
0
0
bit 5
DID5
bit 4
DID4
bit 3
DID3
bit 2
DID2
bit 1
DID1
bit 0
DID0
1
1
0
1
0
1
Device and Revision ID Register Definition
Register
Bit
Name
bit 0
DID0
~
~
Device ID
bit 5
DID5
REV0
bit 6
Revision ID
~
~
REV1
bit 7
Rev-E-00
R/W
65
Definition
R
Device ID indicator (0x35)
R
Revision ID indicator (initially 0x00)
2008/01
[AK8853XQ/ VN]
11. System connection example
PVDD2
pull
up
Micro Processor
2
(I C Controller)
PVDD1
SELA SDA SCL RSTN PDN
Video IN
OE
0.033uF
47Ω
AIN1
AIN2
AIN3
AIN4
PVDD1
0.1uF
10uF
DVSS
30Ω
PVDD2
PVDD2
0.1uF
IREF
VRP
VCOM
VRN
0.1uF 0.1uF 0.1uF
10uF
DVSS
AK8853
DVDD
ATIO
DVDD
6.8kΩ
0.1uF
10uF
DVSS
CLKMD
AVDD
AVDD
0.1uF
XTI
22pF
24.576MHz
10uF
AVSS
XTO
22pF
DATA[7:0]
NSIG
DTCLK
DVALID_F
VD_F
HD
TEST0
TEST1
Analog GND
Rev-E-00
66
Digital GND
2008/01
[AK8853XQ/ VN]
12. Package
(AK8853XQ)
9.0 ± 0.2
7.0
25
37
24
48
13
7.0
9.0 ± 0.2
36
1
12
0.19 ± 0.05
0.5
0°~10°
0.10 M
1.0
1.4TYP
0.17 ± 0.05
1.60MAX
0.10
0.10 ± 0.07
0.5 ± 0.2
Rev-E-00
67
2008/01
[AK8853XQ/ VN]
(AK8853VN)
7.20±0.10
7.00±0.05
3-0.50 +0.40
-0.15
A
36
37
B
45°
1
45°
13
13
48
C0.6
36
25
24
24
7.00±0.05
7.20±0.10
3-C0.2
25
37
0.17±0.05
48
12
12
0.22±0.05
0.35±0.12
0.05 M S AB
1
0.25 +0.40
-0.15
Rev-E-00
0.92±0.08
0.05 S
S
-0.015
0.02 +0.02
0.17±0.05
0.50
68
2008/01
[AK8853XQ/ VN]
13. Marking
(AK8853XQ)
AKM
AK8853XQ
XXXXXXX
1
AKM:
AKM Logo
AK8853XQ:
Marketing Code
XXXXXXX (7 digits): Date Code
(AK8853VN)
AKM
AK8853VN
XXXXXXX
1
AKM:
AKM Logo
AK8853VN:
Marketing Code
XXXXXXX (7 digits): Date Code
Rev-E-00
69
2008/01
[AK8853XQ/ VN]
IMPORTANT NOTICE
These products and their specifications are subject to change without notice.
Before considering any use or application, consult the Asahi Kasei Microsystems Co., Ltd.
(AKM) sales office or authorized distributor concerning their current status.
AKM assumes no liability for infringement of any patent, intellectual property, or other
right in the application or use of any information contained herein.
Any export of these products, or devices or systems containing them, may require an
export license or other official approval under the law and regulations of the country of
export pertaining to customs and tariffs, currency exchange, or strategic materials.
AKM products are neither intended nor authorized for use as critical components in any
safety, life support, or other hazard related device or system, and AKM assumes no
responsibility relating to any such use, except with the express written consent of the
Representative Director of AKM. As used here:
(a) A hazard related device or system is one designed or intended for life support or
maintenance of safety or for applications in medicine, aerospace, nuclear energy, or
other fields, in which its failure to function or perform may reasonably be expected to
result in loss of life or in significant injury or damage to person or property.
(b) A critical component is one whose failure to function or perform may reasonably be
expected to result, whether directly or indirectly, in the loss of the safety or
effectiveness of the device or system containing it, and which must therefore meet very
high standards of performance and reliability.
It is the responsibility of the buyer or distributor of an AKM product who distributes,
disposes of, or otherwise places the product with a third party to notify that party in advance
of the above content and conditions, and the buyer or distributor agrees to assume any and
all responsibility and liability for and hold AKM harmless from any and all claims arising
from the use of said product in the absence of such notification.
Rev-E-00
70
2008/01