ADV7510 to ADV7511 Change Over Guide PDF

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ADV7510 to ADV7511Differences
September, 2010
Overview
 Pin
Out and other Hardware Changes
 Audio Return Channel
 3D Format Support
 Improved Electrical Characteristics
 CEC
3 Buffers
 HDMI 1.4 CEC Features

 HDCP
 CSC
and Packet Update Feature
 Video Input Detection
 Video Data Range Clipping
 Miscellaneous
Chip ID and Revision Registers
 TMDS Clock Inversion
 Internal HPD Pulldown

 Changes
2
in Fixed Registers
Pinout Differences
 ADV7511
and ADV7510 share a “pin-similar” 100-pin LQFP package
 HEAC+/- and SPDIF_OUT pins added

Changed from GND and NC
pin now includes an internal pull-down resistor (see slide 24)
100 GND
99 GND
98 HSYNC
97 DE
96 D0
95 D1
94 D2
93 D3
92 D4
91 D5
90 D6
89 D7
88 D8
87 D9
86 D10
85 D11
84 D12
83 D13
82 D14
81 D15
80 D16
79 CLK
78 D17
77 DV DD
76 DV DD
 HPD
PIN 1
INDICATOR
ADV7511
TOP VIEW
(Not to Scale)
BGV DD 26
GND 27
R_EXT 28
AVDD 29
HPD 30
GND 31
TXC– 32
TXC+ 33
AVDD 34
TX0– 35
TX0+ 36
GND 37
PD 38
TX1– 39
TX1+ 40
AV DD 41
TX2– 42
TX2+ 43
GND 44
INT 45
SPDIF_OUT 46
DVDD_3V 47
CEC_IN 48
DVDD 49
CEC_CLK 50
DVDD 1
VSYNC 2
DSD0 3
DSD1 4
DSD2 5
DSD3 6
DSD4 7
DSD5 8
DSD_CLK 9
SPDIF 10
MCLK 11
I2S0 12
I2S1 13
I2S2 14
I2S3 15
SCLK 16
LRCLK 17
GND 18
DVDD 19
GND 20
PVDD 21
GND 22
GND 23
PVDD 24
PVDD 25
3
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
GND
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
D32
D33
D34
D35
SDA
SCL
DDCSDA
DDCSCL
HEAC+
HEAC-
Audio Return Channel
 ADV7511
adds the ARC function from HDMI 1.4a
 PCB Change

Add the following circuit to incorporate the ARC function in hardware
ADV7511
HEAC+
To SPDIF Receiver
(3.3V CMOS)
1uF
52
SPDIF_ OUT
46
ARC Receiver
1.8V
50 ohms
1uF
51
HEAC-
 ARC
4
Registers
From HDMI
connector
3D Format Support (1)
 ADV7510
does not work with all 3D structures at all resolutions
 ADV7511 works with all 3D structures at all video resolutions
defined in CEA 861E, assuming the TMDS clock is within the
allowable range for the ADV7511 (< 225 MHz)
 Registers for DE Generation, Embedded Sync Generation, and
Sync Adjustment have been expanded in order to support all 3D
modes. This is shown in the following tables:

5
DE Generation
Parameter
ADV7510
ADV7511
Hsync Delay
10 bit: (0x35[7:0],0x36[7:6])
11 bit: (0xFB[7],0x35[7:0],0x36[7:6])
Vsync Delay
6 bit: (0x36[5:0])
8 bit: (0xFB[6:5], 0x36[5:0]
Active Width
12 bit: (0x37[4:0],0x38[7:1])
13 bit: (0xFB[4], 0x37[4:0],0x38[7:1])
Active Height
12 bit: (0x39[7:0],0x3A[7:4])
13 bit: (0xFB[3], 0x39[7:0],0x3A[7:4])
3D Format Support (2)

Parameter
ADV7510
ADV7511
Hsync Placement
10 bit:
(0xD7[7:0],0xD8[7:6])
13 bit:
(0xFA[4:2],0xD7[7:0],0xD8[7:6])
Vsync Window
9 bit:
(0xDC[4:0],0xDD[7:4])
11 bit:
(0xFA[1:0],0xDC[4:0],0xDD[7:4])

6
Sync Adjustment
Embedded Sync Decoding
Parameter
ADV7510
ADV7511
Hsync Placement
10 bit:
(0x30[7:0],0x31[7:6])
13 bit:
(0xFA[7:5],0x30[7:0],0x31[7:6])
Improved Electrical Characteristics
 Rise
time and fall time have been decreased for more margin
on the 1080p 12-bit color eye diagram.
 The
 ESD
7
R_EXT sensitivity to noise has been decreased
protection has been improved on the R_EXT pin
CEC Section Functionality Changes
2
Rx message buffers added
 I2C
Controls to handle 2 buffers are added (detailed in
Register Changes section)
 Interrupts
for user defined Op Codes are added
 Rx
Enable is now a read only bit. It does not need to be
written to enable the Rx.
 Tx
Enable is no longer self clearing, and must be cleared
manually
8
CEC Register Map Changes – CEC Rx (1)

ADV7510:
Address
Address
0x2B
0x2C
0x2D-0x2E
0x2F-0x30
0x31-0x32
0x33-0x34
0x35-0x36
0x37-0x38
0x39-0x3A
0x3B-0x3C
0x3D-0x3E
0x3F-0x40
0x41-0x42
0x43-0x44
0x45-0x46
0x47-0x48
0x49
0x4A-0x4B
0x4C
0x4D-0x4E
Register Name
Logical Address Mask
Error Report Mode
Error Detect Mode
Force NACK
Force Ignore
Logical Address1
Logical Address0
Logical Address2
Clock Divider
Power Mode
Glitch Filter Ctrl
Soft Reset
St Total
St Total Min
St Total Max
St Low
St Low Min
St Low Max
Bit Total
Bit Total Min
Bit Total Max
Bit Low One
Bit Low Zero
Bit Low Max
Sample Time
Line Error Time
Fixed
Rise Time
Bit Low Detection Mode
Bit Low One Min
0x4F-0x50
R/W [15:0]
0x51-0x52
R/W [15:0]
0x28
0x29
9
To make room for
register controls for the
additional CEC Rx
buffers, the CEC timing
related registers in the
CEC Register Map were
moved from 0x27-0x52
to 0x4B – 0x76
ADV7511:
Type Bits
[6:4]
[3]
R/W [2]
[1]
[0]
[7:4]
R/W
[3:0]
R/W [3:0]
[7:2]
R/W
[1:0]
R/W [5:0]
R/W [0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [0]
R/W [15:0]
R/W [0]
R/W [15:0]
0x27


0x2A
0x4F
0x50
0x51-0x52
0x53-0x54
0x55-0x56
0x57-0x58
0x59-0x5A
0x5B-0x5C
0x5D-0x5E
0x5F-0x60
0x61-0x62
0x63-0x64
0x65-0x66
0x67-0x68
0x69-0x6A
0x6B-0x6C
0x6D
0x6E-0x6F
0x70
0x71-0x72
Type Bits
[6:4]
[3]
R/W [2]
[1]
[0]
[7:4]
R/W
[3:0]
R/W [3:0]
[7:2]
R/W
[1:0]
R/W [5:0]
R/W [0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [15:0]
R/W [0]
R/W [15:0]
R/W [0]
R/W [15:0]
Register Name
Logical Address Mask
Error Report Mode
Error Detect Mode
Force NACK
Force Ignore
Logical Address1
Logical Address0
Logical Address2
Clock Divider
Power Mode
Glitch Filter Ctrl
Soft Reset
St Total
St Total Min
St Total Max
St Low
St Low Min
St Low Max
Bit Total
Bit Total Min
Bit Total Max
Bit Low One
Bit Low Zero
Bit Low Max
Sample Time
Line Error Time
Fixed
Rise Time
Bit Low Detection Mode
Bit Low One Min
Bit Low One Max
0x73-0x74
R/W [15:0]
Bit Low One Max
Bit Low Zero Min
0x75-0x76
R/W [15:0]
Bit Low Zero Min
0x4B
0x4C
0x4D
0x4E
CEC Register Map Changes – CEC Rx (2)
2
new CEC Rx buffers have been added
 The 3 buffers are named 1, 2, and 3
 The Length, Header, and Data for buffer 1 are the same as the
controls for the buffer on ADV7510 (0x15-0x25)
Added Message Length for buffers 2 and 3 (0x37[4:0] and 0x48[4:0])
 Added Message Header for buffers 2 and 3 (0x27 and 0x38)
 Added Message Data [14:0] for buffers 2 and 3 (0x28-0x36 and 0x39-47)
 ADV7510 and ADV7511 (buffer 1 registers):

Address Type Bits Register Name
10
0x15
RO
0x16
RO
0x17
RO
0x18
RO
0x19
RO
0x1A
RO
0x1B
RO
0x1C
RO
0x1D
RO
0x1E
RO
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
]
[7:0
Rx Frame Header (Buffer 1)
Rx Frame Data0 (Buffer 1)
Rx Frame Data1 (Buffer 1)
Rx Frame Data 2 (Buffer 1)
Rx Frame Data3 (Buffer 1)
Rx Frame Data4 (Buffer 1)
Rx Frame Data5 (Buffer 1)
Rx Frame Data6 (Buffer 1)
Rx Frame Data7 (Buffer 1)
Rx Frame Data8 (Buffer 1)
CEC Register Map Changes – CEC Rx (3)

Added on ADV7511 (buffer 2 and buffer 3 registers):
Address Type Bits
Register Name
Address Type Bits
Register Name
0x27
0x28
0x29
0x2A
0x2B
0x2C
0x2D
0x2E
0x2F
0x30
0x31
0x32
0x33
0x34
0x35
0x36
0x37
Rx Frame Header (Buffer 2)
Rx Frame Data0 (Buffer 2)
Rx Frame Data1 (Buffer 2)
Rx Frame Data 2 (Buffer 2)
Rx Frame Data3 (Buffer 2)
Rx Frame Data4 (Buffer 2)
Rx Frame Data5 (Buffer 2)
Rx Frame Data6 (Buffer 2)
Rx Frame Data7 (Buffer 2)
Rx Frame Data8 (Buffer 2)
Rx Frame Data9 (Buffer 2)
Rx Frame Data10 (Buffer 2)
Rx Frame Data11 (Buffer 2)
Rx Frame Data12 (Buffer 2)
Rx Frame Data13 (Buffer 2)
Rx Frame Data14 (Buffer 2)
Rx Frame Length (Buffer 2)
0x38
0x39
0x3A
0x3B
0x3C
0x3D
0x3E
0x3F
0x40
0x41
0x42
0x43
0x44
0x45
0x46
0x47
0x48
Rx Frame Header (Buffer 3)
Rx Frame Data0 (Buffer 3)
Rx Frame Data1 (Buffer 3)
Rx Frame Data 2 (Buffer 3)
Rx Frame Data3 (Buffer 3)
Rx Frame Data4 (Buffer 3)
Rx Frame Data5 (Buffer 3)
Rx Frame Data6 (Buffer 3)
Rx Frame Data7 (Buffer 3)
Rx Frame Data8 (Buffer 3)
Rx Frame Data9 (Buffer 3)
Rx Frame Data10 (Buffer 3)
Rx Frame Data11 (Buffer 3)
Rx Frame Data12 (Buffer 3)
Rx Frame Data13 (Buffer 3)
Rx Frame Data14 (Buffer 3)
Rx Frame Length (Buffer 3)
11
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[4:0]
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[4:0]
CEC Register Map Changes – CEC Rx (4)
 The

Rx Enable bit was also removed (R0x26[0])
The ADV7511’s CEC Rx is ready to receive messages upon power-up
 Added
three 2-bit Time Stamp registers for Buffers 3, 2, and 1
(0x26[5:4],0x26[3:2],0x26[1:0])

Specifies the order in which the message in the current buffer was
received relative to the other buffers
 00 – no valid message
 01 – first received of current buffered messages
 10 – second received of current buffered messages
 11 – third received of current buffered messages
 Added
12
on ADV7511:
Address Type
Bits
Register Name
0x26
[5:4]
[3:2]
[1:0]
Rx 3 Time Stamp
Rx 2 Time Stamp
Rx 1 Time Stamp
R/W
CEC Register Map Changes – CEC Rx (5)
 Added
Rx Ready (0x49[2], 0x49[1], and 0x49[0]) and Clear Rx
Ready (0x4A[2], 0x4A[1], and 0x4A[0]) for buffers 3, 2, and 1
 Status
 Added
register and clearing register for available messages
Use All Buffers (0x4A[3])
 Selects
between 1 message buffering and 3 message buffering
mode

Added on ADV7511:
Address
0x49
0x4A
13
Type
R/W
R/W
Bits
Register Name
[2]
Rx 3 Ready
[1]
Rx 2 Ready
[0]
Rx 1 Ready
[3]
Use All Buffers
[2]
Clear Rx 3 Ready
[1]
Clear Rx 2 Ready
[0]
Clear Rx 1 Ready
CEC Register Map Changes – Op Code
Interrupts
 Added
eight one byte “Wake Up Op Code” registers (0x77 –
0x7E)
 These
registers set op codes to trigger interrupts (found in register
0x92 and 0x93 of the main register map)
 Standard CEC op codes requiring a response are the default
 The user can customize the op codes using I2C writes

14
Added on ADV7511 (CEC
Map):
Address
Type
Bits
Register Name
0x77
RO
[7:0]
Wake Up Op Code 1
0x78
RO
[7:0]
Wake Up Op Code 2
0x79
RO
[7:0]
Wake Up Op Code 3
0x7A
RO
[7:0]
Wake Up Op Code 4
0x7B
RO
[7:0]
Wake Up Op Code 5
0x7C
RO
[7:0]
Wake Up Op Code 6
0x7D
RO
[7:0]
Wake Up Op Code 7
0x7E
RO
[7:0]
Wake Up Op Code 8
Main Register Map Changes (for CEC)
 CEC
Interrupt Registers
 Added
Interrupt Enables for
Opcode Wakeup (0x92)
 Added Interrupts for Opcode
Wakeup (0x93)
 Added Interrupt Enables for Rx
Ready 2-0 (0x95[2:0])
 Added Interrupts for Rx Ready
2-0 (0x97[2:0])
15

Added on ADV7511
(Main Map):
Address Type Bits
[7]
[6]
[5]
[4]
0x92
R/W
[3]
[2]
[1]
[0]
[7]
[6]
[5]
[4]
0x93
R/W
[3]
[2]
[1]
[0]
[2]
0x95
R/W [1]
[0]
[2]
0x97
R/W [1]
[0]
Register Name
Wake Up Op Code 1 Interrupt Enable
Wake Up Op Code 2 Interrupt Enable
Wake Up Op Code 3 Interrupt Enable
Wake Up Op Code 4 Interrupt Enable
Wake Up Op Code 5 Interrupt Enable
Wake Up Op Code 6 Interrupt Enable
Wake Up Op Code 7 Interrupt Enable
Wake Up Op Code 8 Interrupt Enable
Wake Up Op Code 1 Interrupt
Wake Up Op Code 2 Interrupt
Wake Up Op Code 3 Interrupt
Wake Up Op Code 4 Interrupt
Wake Up Op Code 5 Interrupt
Wake Up Op Code 6 Interrupt
Wake Up Op Code 7 Interrupt
Wake Up Op Code 8 Interrupt
Rx Ready 3 Interrupt Enable
Rx Ready 2 Interrupt Enable
Rx Ready 1 Interrupt Enable
Rx Ready 3 Interrupt
Rx Ready 2 Interrupt
Rx Ready 1 Interrupt
CEC CDC HPD and Arbitration
 In
HDMI 1.4, special rules for CDC message arbitration were
defined
 ADV7511 can either enable or disable this special arbitration
using CDC Arbitration Enable Register 0x7F[7] in the CEC
Register Map
 Added HPD Control Register 0xD6[7:6] in the Main Register
Map
 00
= HPD is from both HPD pin and CDC HPD
 01 = HPD is from CDC HPD
 10 = HPD is from HPD pin

16
11 = HPD is always high
CEC CDC HPD and Arbitration
 New
Registers in CEC Map
Address
0x7F
0x80
Type
R/W
R/W
Default
Value
Register
Name
Function
1*******
CDC
Arbitration
Enable
Controls whether to do special CDC
messsage arbitration upon receiving CDC
messsage
1 = enable
0 = disable
[6]
*1******
CDC HPD
Response
Enable
Controls whether to toggle internal HPD
signals when receving CDC HPD messsage
1 = enable
0 = disable
[15:0]
00000000
CEC
Physical
Address
Physical address of CEC device
Bits
[7]
0x81
17
00000000
0x82
R/W
[7:0]
00000001
CDC HPD
Timer Count
Controls the time CDC HPD stays low when
receiving CDC HPD toggle message.
HPD low = CDC_HPD_Timer_Count *
CEC_CLK.
CEC_CLK is 760KHz by default.
0x83
RO
[7]
0*******
CDC HPD
HPD signal from CEC interface
HDCP Adjustments Added
 Delay
can be controlled throughout each step of the HDCP
authentication procedure
 New Registers
 HDCP
Ri Checking Frequency 0xFC[7:6]
 HDCP Ri Checking Position Delay 0xFC[5:3]
 HDCP BCAPS Read Delay 0xFC[2:0]
 HDCP An Write Delay 0xFD[7:5]
 HDCP AKSV Write Delay 0xFD[4:2]
 HDCP Start Delay 0xFE[7:5]
18
HDCP New Registers
Address
Type
Bits
Default Value
Register Name
Function
0xFC
R/W
[7:6]
00******
Ri Checking
Freqyency
[5:3]
**000***
Ri Checking Position
Delay
[2:0]
*****000
BCAPS Read Delay
[7:5]
000*****
An Write Delay
[4:2]
***000**
ASKV Write Delay
[7:5]
000*****
HDCP Start Delay
Ri Checking Freqyency
00 = 128 frames
10 = 64 frames
10 = 32 frames
11 = 16 frames
Ri Checking Position Delay in Units of Hsync
0 = no delay
1 = 8 Hsyncs
2 = 16 Hsyncs
3 = 32 Hsyncs
4 = 64 Hsyncs
5 = 128 Hsyncs
6 = 256 Hsyncs
7 = 512 Hsycns
Delay Between Reading of BKSV and BCAPs
000 = no delay
001 = 1ms
010 = 2ms
011 = 5ms
100 = 10ms
101 = 25ms
110 = 50ms
111 = 100ms
Delay Between Reading of BCAPS and Writing of An
000 = no delay
001 = 1ms
010 = 2ms
011 = 5ms
100 = 10ms
101 = 25ms
110 = 50ms
111 = 100ms
Delay Between Writing of An and Writing of AKSV
000 = no delay
001 = 1ms
010 = 2ms
011 = 5ms
100 = 10ms
101 = 25ms
110 = 50ms
111 = 100ms
Delay Between Setting Enable HDCP Register 0xAF[7] = 1 and
Reading of BKSV
000 = no delay
001 = 1ms
010 = 2ms
011 = 5ms
100 = 10ms
101 = 25ms
110 = 50ms
111 = 100ms
0xFD
0xFE
19
R/W
R/W
CSC and Packet Update Feature
 To
avoid sending partially updated packets, a packet update
features has been added for CSC and all HDMI packets
 The packet/CSC update bit should be set to 1 before updating
registers related to the packet or CSC, then set to 0 when
updating is complete
 CSC
CSC Coefficient Update register –0x1A[5]
 The CSC Coefficient Update includes timing control to ensure that
the coefficients are updated during the blanking period
 Does not include the “scaling factor” bits (R0x18[6:5]) – changes to
these bits take effect immediately
 Added
20
CSC and Packet Update Feature
 Note:
Since Packet Update Memory is shared, only one packet
can use the feature at one time
21
Packet Type
Control Bits
AVI InfoFrame
Main map 0x4A[6]
Audio InfoFrame
Main Map 0x4A[5]
General Control Packet
Main Map 0x4A[4]
Source Product Description Packet
Packet Memory 0x1F[7]
MPEG InfoFrame
Packet Memory 0x3F[7]
Audio Content Protection Packet
Packet Memory 0x5F[7]
ISRC 1 Packet
Packet Memory 0x7F[7]
ISRC 2 Packet
Packet Memory 0x9F[7]
Gamut Metadata Packet
Packet Memory 0xBF[7]
Spare Packet 1
Packet Memory 0xDF[7]
Spare Packet 2
Packet Memory 0xFF[7]
Video Input Detection
Low Refresh Rate (VID Detection) – Register
0xFB[2:1]
 Added
 00
= Non Low Refresh Rate
 01 = 24Hz
 10 = 25Hz
 11 = 30Hz
 Removed
22
Low Refresh Rate Video Register (0x48[7])
Video Data Range Clipping
 Video
Data Range Clipping registers were moved from 0x530x5A in the CEC map to 0xC0-0xC7 in the CEC Map
Address
Type
Bits
Default
Value
Register Name
Function
0x53
R/W
[11:0]
****0000
Y or RGB
Minimum
Minumum value for Y or RGB for video data
clipping.
Y or RGB
Maximum
Maximum value for Y or RGB for video data
clipping.
CbCr Minimum
Minimum value for Cb/Cr for video data clipping
CbCr Maximum
Maximum value for Cb/Cr for video data clipping.
0x54
ADV7510
ADV7511
0x55
00000000
R/W
[11:0]
R/W
[11:0]
R/W
[11:0]
Address
Type
Bits
Default
Value
Register Name
Function
0xC0
R/W
[11:0]
****0000
Y or RGB
Minimum
Minumum value for Y or RGB for video data
clipping.
Y or RGB
Maximum
Maximum value for Y or RGB for video data
clipping.
CbCr Minimum
Minimum value for Cb/Cr for video data clipping
CbCr Maximum
Maximum value for Cb/Cr for video data clipping.
0x56
0x57
0x58
0x59
0xC1
0xC2
0xC3
0xC4
0xC5
0xC6
23
****1111
11111111
****0000
00000000
****1111
00000000
R/W
[11:0]
R/W
[11:0]
R/W
[11:0]
****1111
11111111
****0000
00000000
****1111
Miscellaneous Changes
 Chip
ID
 Added
Chip ID 0xF5-0xF6 = 0x7511
 Added Chip ID Suffix 0xF7 = 0x00
 Added
TMDS Clock Inversion bit 0xDE[3]
Address
Type
Bits
Default Value
Register Name
Function
0xDE
R/W
[3]
****0***
TMDS Clock Inversion
TMDS Clock Inversion
0 = Normal TMDS Clock
1 = Inverted TMDS Clock
 Added
Internal HPD Pull-down Resistor
 Allows
user to remove recommended 10k pull-down
 Controlled by register 0xE0[0]
Address
0xE0
24
Type
R/W
Bits
[0]
Default Value
*******0
Register Name
Function
HPD Pull Down
HPD Pull Down
0 = No Internal HPD Pulldown
1 = Weak Internal HDP Pulldown
Active
Fixed Register Changes
 The
following tables reflect changes to the “fixed” registers
and their recommended settings
25
Register
ADV7510 Setting
ADV7511 Setting
0x9A[7:1]
Default
Set to 0b1110000
0xDE
Set 0x9C
Default
0xE0
Default
Set to 0xD0
0xF9
Default
Set to 0x00
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