STV9211 Datasheet, PDF (19/37 Pages) STMicroelectronics – 150 MHz PIXEL VIDEO CONTROLLER FOR MONITORS IN DC-COUPLING MODE

STV9211
Functional description
2.17
Serial interface
The 2-wire serial interface is an I²C interface. The slave address of the STV9211 is DC hex.
A6
A5
A4
A3
A2
A1
A0
W
1
1
0
1
1
1
0
0
The host MCU can write into the STV9211 Registers. Read mode is not available.
In order to write data into the STV9211, after the “start” message, the MCU must send the
following data (see Figure 13):
q the I²C address slave byte with a low level for the R/W bit,
q the byte to the internal Register address where the MCU wants to write data,
q the data.
All bytes are sent with MSB bit first. The transfer of written data is ended with a “stop” message.
When transmitting several data, the Register addresses and data can be written with no need to
repeat the start and slave addresses.
Figure 13: I²C write operation
2.18
Power-on reset
A power-on reset function is implemented on the STV9211 so that the I²C registers have a
determined status after power-on. The Power-on reset threshold for a rising supply on V_CCA (Pin 7)
is 3.8 V (typ.) and 3.2V when the V_CC decreases.
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