DS90UB913A-Q1 Datasheet, PDF (27/51 Pages) Texas Instruments – 25-MHz to 100-MHz 10/12-Bit FPD-Link III Serializer

www.ti.com
DS90UB913A-Q1
SNLS443C – MAY 2013 – REVISED APRIL 2016
Programming (continued)
8.5.5 ID[x] Address Decoder on the Serializer
The ID[x] pin on the Serializer is used to decode and set the physical slave address of the Serializer (I2C only) to
allow up to five devices on the bus connected to the Serializer using only a single pin. The pin sets one of the 6
possible addresses for each Serializer device. The pin must be pulled to V_DD (1.8 V, not V_DDIO) with a 10-kΩ
resistor and a pull-down resistor (R_ID) of the recommended value to set the physical device address. The
recommended maximum resistor tolerance is 1%.
1.8V
HOST
SCL
SDA
V_DDIO
RPU
RPU
10k
ID[x]
R_ID
Serializer
SCL
SDA
To other Devices
Figure 25. ID[x] Address Decoder on the Serializer
Table 5. ID[x] Resistor Value for DS90UB913A-Q1 Serializer
ID[x] RESISTOR VALUE — DS90UB913A-Q1 SERIALIZER
Resistor RID (kΩ)
(1% Tolerance)
Address 7'b
Address 8'b 0 appended
(WRITE)
0
0x58
0xB0
2
0x59
0xB2
4.7
0x5A
0xB4
8.2
0x5B
0xB6
14
0x5C
0xB8
100
0x5D
0xBA
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 DS90UB913A 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 8 ID Alias's are supported in sensor mode when slaves are attached to the DS90UB913A
serializer. In display mode, when the external slaves are at the deserializer the DS90UB913A supports one ID
Alias. The ECU Controller must keep track of the list of I2C peripherals in order to properly address the target
device.
See Figure 26 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
Copyright © 2013–2016, Texas Instruments Incorporated
Product Folder Links: DS90UB913A-Q1
Submit Documentation Feedback
27