DS90UB901Q_15 Datasheet, PDF (27/50 Pages) Texas Instruments – 10 - 43MHz 14 Bit Color FPD-Link III Serializer and Deserializer with Bidirectional Control Channel

DS90UB901Q, DS90UB902Q
www.ti.com
SNLS322E – JUNE 2010 – REVISED APRIL 2013
Any remote access involves the clock stretching period following the transmitted byte, prior to completion of the
acknowledge bit. Since each byte transferred to the I2C slave must be acknowledged separately, the clock
stretching will be done for each byte sent by the host controller. For remote accesses, the “Response Delay”
shown is on the order of 12 µs (typical). See Application Note AN-2173 (SNLA131) for more details.
ID[X] ADDRESS DECODER
The ID[x] pin is used to decode and set the physical slave address of the Serializer/Deserializer (I²C only) to
allow up to six devices on the bus using only a single pin. The pin sets one of six possible addresses for each
Serializer/Deserializer device. The pin must be pulled to VDD (1.8V, NOT VDDIO)) with a 10 kΩ resistor and a
pull down resistor (RID) of the recommended value to set the physical device address. The recommended
maximum resistor tolerance is 0.1% worst case (0.2% total tolerance).
1.8V
HOST
SCL
SDA
V_DDIO
RPU
RPU
10 k:
ID[x]
R_ID
SER
or
SCL _DES
SDA
To other
Devices
Figure 28. Bidirectional Control Bus Connection
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