DS90UB913Q, DS90UB914Q
SNLS420B –JULY 2012–REVISED APRIL 2013
www.ti.com
Table 9. Output States
Inputs
Outputs
DATA, GPIO, CLK
Serial Inputs
PDB
OEN
OSS
LOCK
Pass
I2S
X
0
1
1
1
X
0
0
1
X
0
1
0
Z
Z
L
Z
L
Z
Z
L
Z
X
L or H
L or H
L
L
X
Z
Static
L
L/Osc(Register Bit
Enable)
Static
Active
Active
1
1
1
1
1
1
1
0
1
H
H
H
Previous State
L
L
L
L
L
Valid
Valid
Valid
Programmable Controller
An integrated I2C slave controller is embedded in the DS90UB913Q Serializer as well as the DS90UB914Q
Deserializer. It must be used to configure the extra features embedded within the programmable registers or it
can be used to control the set of programmable GPIOs.
Multiple Device Addressing
Some applications require multiple camera devices with the same fixed address to be accessed on the same I2C
bus. The DS90UB913/914 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_ID_MATCH register on Deserializer. This will remap the SLAVE_ID_MATCH address to the target
SLAVE_ID_INDEX address; up to 8 ID indexes are supported. The ECU Controller must keep track of the list of
I2C peripherals in order to properly address the target device.
See Figure 36 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, the DES A address 0xC0 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
0xC2 will forward transaction to slave device 0xA2.
The Slave ID index/match is supported only in the camera mode (SER: MODE pin = L; DES: MODE pin = H).
For Multiple device addressing in display mode (SER: MODE pin = H; DES: MODE pin = L), use the I2C pass
through function.
46
Submit Documentation Feedback
Copyright © 2012–2013, Texas Instruments Incorporated
Product Folder Links: DS90UB913Q DS90UB914Q
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
