DS90UB914A-Q1 Datasheet, PDF (32/61 Pages) Texas Instruments – 25-MHz to 100-MHz 10/12-Bit FPD-Link III Deserializer

DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Table 5. Resistor Values for IDx[0] and IDx[1] on DS90UB914A-Q1 Deserializer
ID[x] RESISTOR VALUE — DS90UB914A-Q1 DESERIALIZER
Resistor R_ID1 (kΩ)
(1%Tolerance)
Resistor R_ID0 (kΩ)
(1%Tolerance)
Address 7'b
Address 8'b 0
appended (WRITE)
0
0
0x60
0xC0
0
3
0x61
0xC2
0
11
0x62
0xC4
0
100
0x63
0xC6
3
0
0x64
0xC8
3
3
0x65
0xCA
3
11
0x66
0XCC
3
100
0x67
0XCE
11
0
0x68
0XD0
11
3
0x69
0XD2
11
11
0x6A
0XD4
11
100
0x6B
0XD6
100
0
0x6C
0XD8
100
3
0x6D
0XDA
100
11
0x6E
0XDC
100
100
0x6F
0XDE
8.5.6 Multiple Device Addressing
Some applications require multiple camera devices with the same fixed address to be accessed on the same I2C
bus. The DS90UB914A provides slave ID matching/aliasing to generate different target slave addresses when
connecting more than two identical devices together on the same bus. This allows the slave devices to be
independently addressed. Each device connected to the bus is addressable through a unique ID by programming
of the Slave alias register on Deserializer. This will remap the Slave alias address to the target SLAVE_ID
address; up to 1 ID Alias is supported when slaves are attached to the DS90UB914A deserializer The ECU
Controller must keep track of the list of I2C peripherals in order to properly address the target device.
See Figure 27 for an example of this function.
• ECU is the I2C master and has an I2C master interface
• The I2C interfaces in DES A and DES B are both slave interfaces
• The I2C protocol is bridged from DES A to SER A and from DES B to SER B
• The I2C interfaces in SER A and SER B are both master interfaces
If master controller transmits I2C slave 0xA0, DES A (address 0xC0), with pass through enabled, will forward the
transaction to remote Camera A. If the controller transmits slave address 0xA4, the DES B 0xC2 will recognize
that 0xA4 is mapped to 0xA0 and will be transmitted to the remote Camera B. If controller sends command to
address 0xA6, the DES B (address 0xC2), with pass through enabled, will forward the transaction to slave device
0xA2.
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