DS90UB914A-Q1 Datasheet, PDF (21/61 Pages) Texas Instruments – 25-MHz to 100-MHz 10/12-Bit FPD-Link III Deserializer

www.ti.com
Feature Description (continued)
Camera A
CMOS
Image
Sensor
DATA
PCLK
Serializer A
FSYNC
I2C
Camera B
CMOS
Image
Sensor
DATA
PCLK
Serializer B
FSYNC
I2C
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Deserializer A
DATA
PCLK
FSYNC
I2C
Deserializer B
DATA
PCLK
ECU
Module
FSYNC
I2C
PC
Copyright © 2016, Texas Instruments Incorporated
Figure 13. Synchronizing Multiple Cameras
DES A
GPIO[n] Input
DES B
GPIO[n] Input
SER A
GPIO[n] Output
SER B
GPIO[n] Output
t1
Figure 14. GPIO Delta Latency
8.3.6 General Purpose I/O (GPIO) Descriptions
There are 4 GPOs on the Serializer and 4 GPIOs on the Deserializer when the DS90UB913A/914A chipsets are
run off the pixel clock from the imager as the reference clock source. The GPOs on the Serializer can be
configured as outputs for the input signals that are fed into the Deserializer GPIOs. In addition, the GPOs on the
Serializer can behave as outputs of the local register on the Serializer. The GPIOs on the Deserializer can be
configured to be the input signals feeding the GPOs (configured as outputs) on the Serializer. In addition the
GPIOs on the Deserializer can be configured to behave as outputs of the local register on the Deserializer. The
DS90UB913A Serializer GPOs cannot be configured as inputs for remote communication with Deserializer. If the
DS90UB913A/914A chipsets are run off the external oscillator source as the reference clock, then GPO3 on the
Serializer is automatically configured to be the input for the external clock and GPO2 is configured to be the
output of the divide-by-2 clock which is fed into the imager as its reference clock. In this case, the GPIO2 and
GPIO3 on the Deserializer can only behave as outputs of the local register on the Deserializer. The GPIO
maximum switching rate is up to 66 kHz when configured for communication between Deserializer GPIO to
Serializer GPO.
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
Submit Documentation Feedback
21