Analog Devices Advantiv ADV7611 Hardware User's Manual page 174

UG-180
REGISTER ACCESS AND SERIAL PORTS DESCRIPTION
The ADV7611 has three 2-wire serial (I
•
2
One main I C port, SDA/SCL, allows a system I
•
2
I C port, DDC Port A allows an HDMI host to access the internal EDID and the HDCP registers
2
MAIN I C PORT
Register Access
The ADV7611 has eight 256-byte maps that can be accessed via the main I
acts as a standard slave device on the I
SCL
SDA
Seven out of the eight maps have a programmable I
multiple slaves on the general I
Table 69. Register Maps and I
Map Default Address
IO Map 0x98 or 0x9A
CP Map 0x00 (disabled)
HDMI Map 0x00 (disabled)
Repeater Map 0x00 (disabled)
EDID Map 0x00 (disabled)
InfoFrame Map 0x00 (disabled)
CEC Map 0x00 (disabled)
DPLL Map 0x00 (disabled)
1
Map is disabled if its address is set to 0x00.
2
IO map address can be changed by pulling up or down VS/FIELD/ALSB pin.
2
IO I C Map Address
It is possible to set the address of the IO Map by using the VS/FIELD/ALSB pin. Follow these steps to set the address of IO map:
1. Pull up theVS/FIELD/ALSB pin with a 10 kΩ resistor to 3.3 V to set the IO map to 0x9A. It should be left floating for 0x98.
If the line VS/FIELD/ALSB is not pulled up, the following steps will have no effect and the IO Map will remain 0x98.
2. On power up, VS pin is tristated and the IO Map will have an address of 0x98, regardless of the pull-up.
3. Set SAMPLE ALSB to 1; this causes the VS/FIELD/ALSB line to be sampled.
a. If VS/FIELD/ALSB was pulled high with a 10 kΩ resistor to 3.3 V, the IO Map address will become 0x9A.
b. If VS/FIELD/ALSB was pulled low, or was left floating, the IO Map address will remain 0x98.
This solution allows connecting two ADV7611 on the one I
pin; Pin VS/FIELD/ALSB on the second part should be left floating. After reset, both parts will have Address 0x98. After sending an I
2
C compatible) ports:
2
C master controller to control and configure the ADV7611
2
C bus.
IO
MAP
SLAVE
ADDRESS:
0x98/0x9A PROGRAMMABLE
SLAVE
ADDRESS: ADDRESS:
PROGRAMMABLE PROGRAMMABLE
HDMI
MAP
Figure 65. ADV7611 Register Map Access through Main I
2
C address. This facilitates the integration of the ADV7611 in systems that have
2
C bus.
2
C Addresses
1
Programmable Address
2
Not programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
2
C ports, SDA and SCL. Each map has its own I
CP CEC
MAP MAP
SLAVE SLAVE
ADDRESS: ADDRESS:
PROGRAMMABLE
SLAVE SLAVE
ADDRESS:
PROGRAMMABLE
EDID REPEATER
MAP MAP
Location at which Address can be Programmed
Not applicable
IO Map Register 0xFD
IO Map Register 0xFB
IO Map Register 0xF9
IO Map Register 0xFA
IO Map Register 0xF5
IO Map Register 0xF4
IO Map Register 0xF8
2
C bus. One part should have a 10 kΩ resistor pull-up on the VS/FIELD/ALSB
Rev. A | Page 174 of 184
Hardware User Guide
INFOFRAME
MAP
SLAVE
ADDRESS:
PROGRAMMABLE
SLAVE
ADDRESS:
PROGRAMMABLE
DPLL
MAP
2
C Port
2
C address and
2
C