ADV8003 Hardware Manual
Rev. B, August 2013
67
1.5.
PROTOCOL FOR MAIN I
2
C PORT
The system controller initiates a data transfer by establishing a start condition, defined by a high to low transition on SDA while SCL
remains high. This transition indicates that an address/data stream will follow. All peripherals respond to the start condition and shift the
next eight bits (7-bit address and R/W bit). The bits are transferred from MSB down to LSB. The peripheral that recognizes the
transmitted address responds by pulling the data line low during the ninth clock pulse. This is known as an acknowledge bit. All other
devices withdraw from the bus at this point and maintain an idle condition.
In the idle condition, the device monitors the SDA and SCL lines for the start condition and the correct transmitted address. The R/W bit
determines the direction of the data. A logic 0 on the LSB of the first byte means that the master will write information to the peripheral. A
logic 1 on the LSB of the first byte means that the master will read information from the peripheral.
The ADV8003 has a single 8-bit I
2
C slave address. All register maps within the ADV8003 can be accessed through this I
2
C address
through 16-bit addressing and 8-bit data registers. The ADV8003 acts as a standard slave device on the I
2
C bus. It interprets the first byte
as the I
2
C address and the second byte and third bytes as the appropriate subaddress. The fourth byte is then considered the data for this
subaddress register. This means that I
2
C writes to the part will be in the form <I
2
C Address>, <Address MSBs>, <Address LSBs>, <Data>.
For example, to write 0xFF to the encoder register map, register 0x59AF, the I
2
C writes needed are 0x1A, 0x59, 0xAF, 0xFF. The addresses
are outlined in
shows the register map architecture for the ADV8003.
Table 6: ADV8003 I
2
C Address and Register Address Range for Different HW Blocks
Register Map Name
I
2
C Address
Register Address
IO Map
0x1A (0x18 with LSB low)
0x1A00 to 0x1BFF
Primary VSP Map
0xE800 to 0xE8FF
Primary VSP Map 2
0xE900 to 0xE9FF
Secondary VSP Map
0xE600 to 0xE6FF
Rx Main Map
0xE200 to 0xE2FF
Rx InfoFrame Map
0xE300 to 0xE3FF
Tx1 Main Map
0xEC00 to 0xECFF
Tx1 EDID Map
0xEE00 to 0xEEFF
Tx1 CEC Map
0xF000 to 0xF0FF
Tx1 UDP Map
0xF200 to 0xF2FF
Tx1 Test Map
0xF300 to 0xF3FF
Tx2 Main Map
0xF400 to 0xF4FF
Tx2 EDID Map
0xF600 to 0xF6FF
Tx2 CEC Map
0xF800 to 0xF8FF
Tx2 UDP Map
0xFA00 to 0xFAFF
Tx2 Test Map
0xFB00 to 0xFBFF
Encoder Map
0xE400 to 0xE4FF
DPLL Map
0xE000 to 0xE0FF
IO
MAP
0x1A00 TO
0x1BFF
0xE800 TO
0xE8FF
0xE600 TO
0xE6FF
DPLL
MAP
0xE000 TO
0xE0FF
Rx MAIN
MAP
0xE200 TO
0xE2FF
Rx INFOFRAME
MAP
0xE300 TO
0xE3FF
ENCODER
MAP
0xE400 TO
0xE4FF
Tx1 TEST
MAP
0xF300 TO
0xF3FF
Tx1 MAIN
MAP
Tx1 EDID
MAP
Tx1 CEC
MAP
Tx1 UDP
MAP
Tx2 MAIN
MAP
Tx2 EDID
MAP
Tx2 CEC
MAP
Tx2 UDP
MAP
Tx2 TEST
MAP
0xEC00 TO
0xECFF
0xEE00 TO
0xEEFF
0xF000 TO
0xF0FF
0xF200 TO
0xF2FF
0xF400 TO
0xF4FF
0xF600 TO
0xF6FF
0xF800 TO
0xF8FF
0xFA00 TO
0xFAFF
0xFB00 TO
0xFBFF
I
2
C
ADDRESS
0x18/0x1A
SCL
SDA
09803-021
PRIMARY VSP
MAP
SECONDARY
VSP MAP
0xE900 TO
0xE9FF
PRIMARY VSP
MAP 2
Figure 11: Register Map Architecture
Summary of Contents for ADV8003
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