Artesyn COMX-P1022 Installation and Use (July 2014) - Manual (Page 64)

Functional Description
COMX-P1022 COM Express Module Installation and Use (6806800M04C) 64
PCA9545's i2c address is E0. There is only a control register in PCA9545 that can be read or
written via I2C#1.
4.6.8 TFP410
There is one TFP410 located on I2C#2, and the device address is 0x70.
The TFP410 is a DVI-compliant digital transmitter that is used in digital host monitor systems
to T.M.D.S. encode and serialize RGB pixel data streams. TFP410 supports resolutions from
VGA to UXGA and can be controlled in two ways: 1) configuration and state pins or 2) the
programmable I2C serial interface.
The host in a digital display system, usually a PC or consumer electronics device, contains a
DVI-compatible transmitter such as the TI TFP410 that receives 24-bit pixel data along with
appropriate control signals. The TFP410 encodes the signals into a high speed, low voltage,
differential serial bit stream optimized for transmission over a twisted-pair cable to a display
device. The display device, usually a flat-panel monitor, requires a DVI compatible receiver like
the TI TFP401 to decode the serial bit stream back to the same 24-bit pixel data and control
signals that originated at the host. This decoded data can then be applied directly to the flat
panel drive circuitry to produce an image on the display. Since the host and display can be
separated by distances up to 5 meters or more, serial transmission of the pixel data is preferred
Table 4-3 PCA955 Register
Bit Name Description
0 BO 0: Channel 0 disable
1: Channel 0 enable
1 B1 0: Channel 1 disable
1: Channel 1 enable
2 B2 0: Channel 2 disable
1: Channel 2 enable
3 B3 0: Channel 3 disable
1: Channel 3 enable