DS90UB901Q Datasheet, PDF (30/45 Pages) Texas Instruments – 10 - 43MHz 14 Bit Color FPD-Link III Serializer and Deserializer with Bidirectional Control Channel

30113543
FIGURE 26. Bidirectional Control Bus Connection
TABLE 3. ID[x] Resistor Value – DS90UB901Q
ID[x] Resistor Value - DS90UB901Q Ser
Resistor
RID Ω
(±0.1%)
Address 7'b
(Note 11)
Address 8'b 0
appended (WRITE)
0
GND
7b' 101 1000 (h'58) 8b' 1011 0000 (h'B0)
2.0k 7b' 101 1001 (h'59) 8b' 1011 0010 (h'B2)
4.7k 7b' 101 1010 (h'5A) 8b' 1011 0100 (h'B4)
8.2k 7b' 101 1011 (h'5B) 8b' 1011 0110 (h'B6)
12.1k 7b' 101 1100 (h'5C) 8b' 1011 1000 (h'B8)
39.0k 7b' 101 1110 (h'5E) 8b' 1011 1100 (h'BC)
TABLE 4. ID[x] Resistor Value – DS90UB902Q
ID[x] Resistor Value - DS90UB902Q Des
Resistor
RID Ω
(±0.1%)
Address 7'b
(Note 11)
Address 8'b 0
appended (WRITE)
0
GND
7b' 110 0000 (h'60) 8b' 1100 0000 (h'C0)
2.0k 7b' 110 0001 (h'61) 8b' 1100 0010 (h'C2)
4.7k 7b' 110 0010 (h'62) 8b' 1100 0100 (h'C4)
8.2k 7b' 110 0011 (h'63) 8b' 1101 0110 (h'C6)
12.1k 7b' 110 0100 (h'64) 8b' 1101 1000 (h'C8)
39.0k 7b' 110 0110 (h'66) 8b' 1100 1100 (h'CC)
CAMERA MODE OPERATION
In Camera mode, I²C transactions originate from the Master
controller at the Deserializer side (Figure 27). The I²C slave
core in the Deserializer will detect if a transaction is intended
for the Serializer or a slave at the Serializer. Commands are
sent over the bidirectional control channel to initiate the trans-
actions. The Serializer will receive the command and gener-
ate an I²C transaction on its local I²C bus. At the same time,
the Serializer will capture the response on the I²C bus and
return the response on the forward channel link. The Deseri-
alizer parses the response and passes the appropriate re-
sponse to the Deserializer I²C bus.
To configure the devices for camera mode operation, set the
Serializer MODE pin to Low and the Deserializer MODE pin
to High. Before initiating any I²C commands, the Deserializer
needs to be programmed with the target slave device ad-
dresses and Serializer device address. SER_DEV_ID Regis-
ter 0x07h sets the Serializer device address and
SLAVE_x_MATCH/SLAVE_x_INDEX
registers
0x08h~0x17h set the remote target slave addresses. In slave
mode the address register is compared with the address byte
sent by the I²C master. If the addresses are equal to any of
registers values, the I²C slave will acknowledge and hold the
bus to propagate the transaction to the target device other-
wise it returns no acknowledge.
www.ti.com
FIGURE 27. Typical Camera System Diagram
30
30113540