DS90UB914A-Q1

Sample &
Buy
Product
Folder
Support &
Community
Tools &
Software
Technical
Documents
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
DS90UB914A-Q1 25-MHz to 100-MHz 10/12-Bit FPD-Link III Deserializer
1 Features
3 Description
•
The DS90UB914A-Q1 device offers an FPD-Link III
interface with a high-speed forward channel and a
bidirectional control channel for data transmission
over a single coaxial cable or differential pair. The
DS90UB914A-Q1 device incorporates differential
signaling on both the high-speed forward channel and
bidirectional control channel data paths. The
deserializer is targeted for connections between
imagers and video processors in an ECU (Electronic
Control Unit). This device is ideally suited for driving
video data requiring up to 12-bit pixel depth plus two
synchronization signals along with bidirectional
control channel bus.
1
•
•
•
•
•
•
•
•
•
•
•
Qualified for Automotive Applications AEC-Q100
– Device Temperature Grade 2: –40℃ to +105℃
Ambient Operating Temperature Range
– Device HBM ESD Classification Level ±8kV
– Device CDM ESD Classification Level C6
25-MHz to 100-MHz Input Pixel Clock Support
Programmable Data Payload:
– 10-bit Payload up to 100 MHz
– 12-bit Payload up to 75 MHz
Continuous Low Latency Bidirectional Control
Interface Channel with I2C Support at 400 kHz
2:1 Multiplexer to choose between two input
images
Capable of Receiving over 15m Coaxial or 20m
Shielded Twisted-pair Cables
Robust Power-Over-Coaxial (PoC) Operation
Receive Equalizer Automatically Adapts for
Changes in Cable Loss
LOCK Output Reporting Pin and @SPEED BIST
Diagnosis Feature to Validate Link Integrity
Single Power Supply at 1.8 V
ISO 10605 and IEC 61000-4-2 ESD Compliant
EMI/EMC Mitigation with Programmable Spread
Spectrum (SSCG) and Receiver Staggered
Outputs
2 Applications
•
•
•
Automotive
– Surround View Systems (SVS)
– Rear and Front View Cameras
– Driver Monitor Cameras (DMS)
– Remote Satellite RADAR Sensors
Security and Surveillance
Industrial Machine Vision
The deserializer features a multiplexer to allow
selection between two input imagers, one active at a
time. The primary video transport converts 10-bit or
12-bit data to a single high-speed serial stream, along
with a separate low latency bidirectional control
channel transport that accepts control information
from an I2C port and is independent of video blanking
period.
Using TI’s embedded clock technology allows
transparent full-duplex communication over a single
differential pair, carrying asymmetrical-bidirectional
control channel information. This single serial stream
simplifies transferring a wide data bus over PCB
traces and cable by eliminating the skew problems
between parallel data and clock paths. This
significantly saves system cost by narrowing data
paths that in turn reduce PCB layers, cable width,
and connector size and pins. In addition, the
Deserializer inputs provide adaptive equalization to
compensate for loss from the media over longer
distances. Internal DC-balanced encoding/decoding is
used to support AC-coupled interconnects.
Device Information(1)
PART NUMBER
DS90UB914A-Q1
PACKAGE
WQFN (48)
BODY SIZE (NOM)
7.00 mm x 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
Parallel
Data In
10 or 12
Parallel
Data Out
10 or 12
FPD-Link III
2
Megapixel
Imager/Sensor
HSYNC,
VSYNC
4
2
DS90UB913AQ1
GPO
2
Bidirectional
Control Bus
Serializer
Bidirectional
Control Channel
DS90UB914AQ1
HSYNC,
VSYNC
4
DSP, FPGA/
µ-Processor/
ECU
GPIO
2
Deserializer
Bidirectional
Control Bus
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
4
4
7
7.1
7.2
7.3
7.4
7.5
7.6
Absolute Maximum Ratings ...................................... 7
ESD Ratings.............................................................. 7
Recommended Operating Conditions....................... 7
Thermal Information .................................................. 8
Electrical Characteristics .......................................... 8
AC Timing Specifications (SCL, SDA) - I2CCompatible ............................................................... 12
7.7 Bidirectional Control Bus DC Timing Specifications
(SCL, SDA) - I2C-Compatible ................................. 13
7.8 Deserializer Switching Characteristics.................... 15
7.9 Typical Characteristics ............................................ 17
8
Detailed Description ............................................ 18
8.1 Overview ................................................................. 18
8.2
8.3
8.4
8.5
8.6
9
Functional Block Diagram .......................................
Feature Description.................................................
Device Functional Modes........................................
Programming ..........................................................
Register Maps .........................................................
18
19
22
29
34
Application and Implementation ........................ 44
9.1 Application Information............................................ 44
9.2 Typical Applications ................................................ 47
10 Power Supply Recommendations ..................... 51
11 Layout................................................................... 52
11.1 Layout Guidelines ................................................. 52
11.2 Layout Example .................................................... 53
12 Device and Documentation Support ................. 55
12.1
12.2
12.3
12.4
12.5
Documentation Support .......................................
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
55
55
55
55
55
13 Mechanical, Packaging, and Orderable
Information ........................................................... 55
4 Revision History
Changes from Original (April 2016) to Revision A
Page
•
Split document into two separate documents for parts DS90UB913A-Q1 SNLS443 and DS90UB914A-Q1 SNLS499. ..... 1
•
Combined revision history showing changes when this document was part of the DS90UB913A-Q1 SNLS443 datasheet 1
•
Added Automotive Features ................................................................................................................................................... 1
•
Updated pin description for ROUT to include active/inactive outputs corresponding to MODE setting................................. 4
•
Added pin description to GPIO pins to leave open if unused. ............................................................................................... 5
•
Updated frequency requirements for 10-bit and 12-bit HF modes. 10-bit mode – 50 MHz to 100 MHz; 12-bit HF
mode – 37.5 MHz to 75 MHz; 12-bit LF mode (no change) – 25 MHz to 50 MHz. .............................................................. 5
•
Added pin description to RIN pins to leave open if unused. ................................................................................................. 6
•
Changed Air Discharge ESD Rating (IEC61000-4-2: RD = 330 Ω, CS = 150 pF) to minimum ±25000 V. .......................... 7
•
Added additional thermal characteristics................................................................................................................................ 8
•
Added GPIO[3:0] typical pin capacitances. ........................................................................................................................... 8
•
Changed Differential Input Voltage minimum specification. ................................................................................................... 9
•
Changed Single-Ended Input Voltage minimum specification................................................................................................ 9
•
Added Back Channel Differential Output Voltage minimum specification. ............................................................................. 9
•
Added Back Channel Single-Ended Output Voltage minimum specification.......................................................................... 9
•
Added footnote that states the following: “UI – Unit Interval is equivalent to one serialized data bit width. The UI
scales with PCLK frequency.” Also added below calculations to footnote. 12-bit LF mode 1 UI = 1 / ( PCLK_Freq. x
28 ) 12-bit HF mode 1 UI = 1 / ( PCLK_Freq. x 2/3 x 28 ) 10-bit mode 1 UI = 1 / ( PCLK_Freq. /2 x 28 ) .......................... 9
•
Updated IDDIOR for VDDIO=1.89V, CL=8pF, Worst-Case Pattern with f=50 MHz, 12-bit low freq mode to typical value of
16 mA; value is currently 21 mA. ........................................................................................................................................ 10
•
Updated IDDIOR for VDDIO=1.89V, CL=8pF, Random Pattern with f=50 MHz, 12-bit low freq mode to typical value of 10
mA; value is currently 14 mA................................................................................................................................................ 10
•
Updated IDDR for VDD_n=1.89V, CL=4pF, Random Pattern with f=100 MHz, 10-bit mode to typical value of 69 mA;
value is currently 57 mA. ..................................................................................................................................................... 10
•
Updated IDDR for VDD_n=1.89V, CL=4pF, Random Pattern with f=75 MHz, 12-bit high freq mode to typical value of 71
mA; value is currently 60 mA................................................................................................................................................ 10
2
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Revision History (continued)
•
Updated IDDR for VDD_n=1.89V, CL=4pF, Random Pattern with f=50 MHz, 12-bit low freq mode to typical value of 67
mA; value is currently 56 mA................................................................................................................................................ 10
•
Updated VOL Output Low Level row with revised IOL currents and max VOL voltages, dependent upon VDDIO voltage........ 13
•
Updated Figure 2 title to state ‘“Worst-Case” Test Pattern for Power Consumption’ .......................................................... 13
•
Updated Figure 3 “Deserializer Vswing Diagram” with correct notation. ............................................................................. 13
•
Changed Figure 3 to clarify difference between STP and Coax .......................................................................................... 13
•
Updated frequency ranges for MODE settings and also revised with correct maximum clock periods. Added footnote
and nominal clock period to be in terms of 'T'. ..................................................................................................................... 15
•
Changed typo on footnote to reflect 'tDPJ'. ............................................................................................................................ 16
•
Added footnote to Figure 11 "Jitter amplitude max (~ 0.61UI) is limited by instrumentation and actual jitter amplitude
max of in-band jitter at low frequency is greater than 1 UI." ................................................................................................ 17
•
Table 2, row 5 with “static” input LOCK output status changed to “L”. ............................................................................... 26
•
Table 5 heading updated to state “DS90UB914A-Q1 DESERIALIZER. ............................................................................. 32
•
Changed description of deserializer reg 0x00 bit[0]=0 from "set using address coming from CAD" to "set from ID[x]" ..... 34
•
Added row to register 0x01[2] for Back Channel Enable – 0: Disable 1: Enable................................................................. 34
•
Changed SSCG Units for fmod (register 0x02[3:0]) to Reflect Hz instead of KHz............................................................... 34
•
Changed parity error reset bit to be NOT self-clearing. ...................................................................................................... 35
•
Changed EQ gain values (dB) @ maximum line rate (1.4Gbps). ........................................................................................ 35
•
Changed description of deserializer reg 0x04 to have correct register setting for each equalization gain level. ................ 35
•
Added registers 0x26, 0x46 for Bidirectional Control Channel (BCC)Tuning. ..................................................................... 42
•
Added deserializer 0x4C SEL register.................................................................................................................................. 43
•
Updated EQ Register Bits 0x4E[3:0] to be Reserved. Also changed EQ gain values (dB) @ maximum line rate
(1.4Gbps).............................................................................................................................................................................. 43
•
Added reference to Power over Coax Application report ..................................................................................................... 44
•
Updated power up sequencing information and timing diagram. ........................................................................................ 44
•
Added power up sequencing information and timing diagram. ............................................................................................ 44
•
Added 914A PDB Reset timing constraints and diagram. ................................................................................................... 45
•
Removed Figure 21 and Figure 43 regarding adaptive equalizer graphs for loss compensation (Coax/STP). .................. 46
•
Renamed C1 and C2 to C22 and C23 for RIN0+ and RIN0- respectively on Typical Application Diagrams (Coax &
STP). .................................................................................................................................................................................... 48
•
Added description specifying that the voltage applied on VDDIO (1.8V, 3.3V) or VDD_n (1.8V) should be at the input
pin – any board level DC drop should be compensated. .................................................................................................... 51
•
Added 914A EVM layout example image. ........................................................................................................................... 54
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
3
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
5 Device Comparison Table
PART NUMBER
FPD-III FUNCTION
PACKAGE
TRANSMISSION MEDIA
PCLK FREQUENCY
DS90UB914Q-Q1
Deserializer
WQFN RHS (48)
STP
10 to 100 MHz
DS90UB914A-Q1
Deserializer
WQFN RHS (48)
Coax or STP
25 to 100 MHz
6 Pin Configuration and Functions
MODE
37
CMLOUTP
38
CMLOUTN
39
PDB
VDDIO1
GPIO[0]
30
29
28
GPIO[3]
VDDCML1
31
25
RIN1+
32
GPIO[1]
RIN133
GPIO[2]
IDx[1]
34
26
IDx[0]
35
27
VDDR
36
48-Pin WQFN
Package RHS
Top View
DAP = GND
24
ROUT[0]
23
ROUT[1]
22
ROUT[2]
VDDCML0
40
21
ROUT[3]
RIN0+
41
20
VDDIO2
RIN0-
42
19
ROUT[4]
RES
43
18
ROUT[5]
RES
44
17
VDDD
VDDPLL
45
16
ROUT[6]
SEL
46
15
ROUT[7]
PASS
47
14
ROUT[8]
LOCK
48
13
ROUT[9]
1
2
3
4
5
6
7
8
9
10
11
12
SDA
SCL
VDDSSCG
OSS_SEL
OEN
BISTEN
VDDIO3
PCLK
VSYNC
HSYNC
ROUT[11]
ROUT[10]
DS90UB914A-Q1
Deserializer
Pin Functions: DS90UB914A-Q1 Deserializer
PIN
NAME
I/O
NO.
DESCRIPTION
LVCMOS PARALLEL INTERFACE
11,12,13,14,
15,16,18,19,
21,22,23,24
Outputs,
LVCMOS
Parallel Data Outputs.
For 10-bit MODE, parallel outputs ROUT[9:0] are active. ROUT[11:10] are inactive and
should not be used. Any unused outputs (including ROUT[11:10]) should be No Connect.
For 12-bit MODE (HF or LF), parallel outputs ROUT[11:0] are active. Any unused outputs
should be No Connect.
HSYNC
10
Output,
LVCMOS
Horizontal SYNC Output. Note: HS transition restrictions: 1. 12-bit Low-Frequency mode: No
HS restrictions (raw) 2. 12-bit High-Frequency mode: No HS restrictions (raw) 3. 10-bit
mode: HS restricted to no more than one transition per 10 PCLK cycles. Leave open if
unused.
VSYNC
9
Output,
LVCMOS
Vertical SYNC Output. Note: VS transition restrictions: 1. 12-bit Low-Frequency mode: No
VS restrictions (raw) 2. 12-bit High-Frequency mode: No VS restrictions (raw) 3. 10-bit mode:
VS restricted to no more than one transition per 10 PCLK cycles. Leave open if unused.
PCLK
8
Output,
LVCMOS
Pixel Clock Output Pin.
Strobe edge set by RRFB control register.
ROUT[11:0]
4
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Pin Functions: DS90UB914A-Q1 Deserializer (continued)
PIN
NAME
I/O
NO.
DESCRIPTION
GENERAL PURPOSE INPUT/OUTPUT (GPIO)
GPI0[1:0]
GPIO[3:2]
27,28
General-purpose input/output pins can be used to control and respond to various commands.
Digital
They may be configured to be the input signals for the corresponding GPOs on the serializer
Input/Output,
or they may be configured to be outputs to follow local register settings. Leave open if
LVCMOS
unused.
25,26
Digital
Input/Output
LVCMOS
General purpose input/output pins GPO[3:2] can be configured to be input signals for GPOs
on the Serializer. In addition they can also be configured to be outputs to follow the local
register settings. When the SerDes chipsets are working with an external oscillator, these
pins can be configured only to be outputs to follow the local register settings. Leave open if
unused.
BIDIRECTIONAL CONTROL BUS - I2C COMPATIBLE
SCL
2
Input/Output, Clock line for the bidirectional control bus communication.
Open Drain SCL requires an external pullup resistor to VDDIO.
SDA
1
Input/Output, Data line for bidirectional control bus communication
Open Drain SDA requires an external pullup resistor to VDDIO.
MODE
37
Input,
LVCMOS
w/ pull up
IDx[0:1]
35,34
Input, analog
Device mode select pin
Resistor to Ground and 10-kΩ pullup to 1.8-V rail. The MODE pin on the Deserializer can be
used to configure the Serializer and Deserializer to work in different input PCLK range. See
details in Table 1.
12– bit low frequency mode – (25 – 50 MHz operation):
In this mode, the Serializer and Deserializer can accept up to 12-bits DATA+2 SYNC. Input
PCLK range is from 25 MHz to 50 MHz. Note: No HS/VS restrictions.
12– bit high frequency mode – (37.5 – 75 MHz operation): In this mode, the Serializer and
Deserializer can accept up to 12-bits DATA + 2 SYNC. Input PCLK range is from 37.5 MHz
to 75 MHz. Note: No HS/VS restrictions.
10–bit mode– (50 – 100 MHz operation):
In this mode, the Serializer and Deserializer can accept up to 10-bits DATA + 2 SYNC. Input
PCLK frequency can range from 50 MHz to 100 MHz. Note: HS/VS restricted to no more
than one transition per 10 PCLK cycles.
Please refer to Table 1 on how to configure the MODE pin on the Deserializer.
The IDx[0] and IDx[1] pins on the Deserializer are used to assign the I2C slave device
address. Resistor to Ground and 10-kΩ pullup to 1.8-V rail. See Table 5
CONTROL AND CONFIGURATION
Power down Mode Input Pin.
PDB = H, Deserializer is enabled and is ON.
PDB = L, Deserializer is in power down mode. When the Deserializer is in power down
mode, programmed control register data are NOT retained and reset to default values.
LOCK Status Output Pin.
LOCK = H, PLL is Locked, outputs are active.
LOCK = L, PLL is unlocked, ROUT and PCLK output states are controlled by OSS_SEL
control register. May be used as Link Status.
PDB
30
Input,
LVCMOS
w/ pulldown
LOCK
48
Output,
LVCMOS
BISTEN
6
Input
LVCMOS w/
pulldown
PASS
47
Output,
LVCMOS
OEN
5
Input
LVCMOS w/
pulldown
Output Enable Input.
Refer to Table 2.
OSS_SEL
4
Input
LVCMOS w/
pulldown
Output Sleep State Select Pin
Refer to Table 2.
SEL
46
Input
LVCMOS w/
pulldown
MUX Select line.
SEL = L, RIN0+/- input. This selects input A as the active channel on the Deserializer.
SEL = H, RIN1+/- input. This selects input B as the active channel on the Deserializer.
BIST Enable pin
BISTEN=H, BIST Mode is enabled.
BISTEN=L, BIST Mode is disabled.
See Built In Self Test for more information.
PASS Output Pin for BIST mode.
PASS = H, ERROR FREE Transmission.
PASS = L, one or more errors were detected in the received payload.
See Built In Self Test for more information. Leave Open if unused. Route to test point (pad)
recommended.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
5
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Pin Functions: DS90UB914A-Q1 Deserializer (continued)
PIN
NAME
NO.
I/O
DESCRIPTION
FPD–Link III INTERFACE
RIN0+
41
Input/Output, Non-Inverting Differential input, bidirectional control channel. The IO must be AC coupled
CML
with a 0.1-µF capacitor. Leave open if unused.
RIN0-
42
Inverting Differential input, bidirectional control channel. The IO must be AC coupled with a
Input/Output, 0.1-µF capacitor. For applications using single-ended coaxial interconnect, a 0.047-µF AC
CML
coupling capacitor should be placed in series with a 50Ω resistor before terminating to GND.
Leave open if unused.
RIN1+
32
Input/Output, Non-Inverting Differential input, bidirectional control channel. The IO must be AC coupled
CML
with a 0.1-µF capacitor. Leave open if unused.
RIN1-
33
Inverting Differential input, bidirectional control channel. The IO must be AC coupled with a
Input/Output, 0.1-µF capacitor. For applications using single-ended coaxial interconnect, a 0.047-µF AC
CML
coupling capacitor should be placed in series with a 50Ω resistor before terminating to GND.
Leave open if unused.
RES
43,44
—
CMLOUTP/N
38,39
Output, CML
Reserved. This pin must always be tied low.
Route to test point or leave open if unused.
POWER AND GROUND
29, 20, 7
Power,
Digital
LVCMOS I/O Buffer Power, The single-ended outputs and control input are powered from
VDDIO. VDDIO can be connected to a 1.8 V ±5% or 3.3 V ±10%.
VDDD
17
Power,
Digital
Digital Core Power, 1.8 V ±5%.
VDDSSCG
3
Power,
Analog
SSCG PLL Power, 1.8 V ±5%.
VDDR
36
Power,
Analog
Rx Analog Power, 1.8 V ±5%.
40,31
Power,
Analog
CML and Bidirectional control channel Drive Power, 1.8 V ±5%.
45
Power,
Analog
PLL Power, 1.8 V ±5%.
DAP
Ground, DAP
VDDIO1/2/3
VDDCML0/1
VDDPLL
VSS
6
DAP must be grounded. DAP is the large metal contact at the bottom side, located at the
center of the WQFN package. Connected to the ground plane (GND) with at least 16 vias.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
MIN
MAX
UNIT
Supply Voltage – VDD_n (1.8 V)
−0.3
2.5
V
Supply Voltage – VDDIO
−0.3
4.0
V
LVCMOS Input Voltage
−0.3
VDDIO + 0.3
V
CML Receiver I/O Voltage (VDD)
-0.3
VDD + 0.3
V
150
°C
150
°C
Junction Temperature
Storage temperature range, Tstg
(1)
-65
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
7.2 ESD Ratings
VALUE
Human body model (HBM), per AEC Q100-002 (1)
V(ESD)
Electrostatic
discharge
Charged device model (CDM), per AEC
Q100-011
ESD Rating (IEC 61000-4-2)
RD = 330 Ω, Cs = 150pF
ESD Rating (ISO10605)
RD = 330 Ω, Cs = 150/330 pF
RD = 2 KΩ, Cs = 150/330 pF
(1)
UNIT
±8000
Corner pins (1, 12, 13, 24,
25, 36, 37, 48)
V
±1000
Other pins
Air Discharge
(DOUT+, DOUT-, RIN+, RIN-)
±25000
Contact Discharge
(DOUT+, DOUT-, RIN+, RIN-)
±7000
Air Discharge
(DOUT+, DOUT-, RIN+, RIN-)
±15000
Contact Discharge
(DOUT+, DOUT-, RIN+, RIN-)
±8000
V
AEC Q100-002 indicates HBM stressing is done in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
MIN
NOM
MAX
UNIT
Supply Voltage (VDD_n)
1.71
1.8
1.89
V
LVCMOS Supply Voltage (VDDIO= 1.8V) OR
1.71
1.8
1.89
LVCMOS Supply Voltage (VDDIO= 3.3V)
3.0
3.3
3.6
Supply Noise (1)
VDD_n (1.8 V)
25
VDDIO (1.8 V)
25
VDDIO (3.3 V)
mVp-p
50
Operating Free Air Temperature (TA)
–40
PCLK Clock Frequency
25
(1)
V
25
105
°C
100
MHz
Supply noise testing was done with minimum capacitors (as shown on Pin Configuration and Functions and Figure 33 on the PCB. A
sinusoidal signal is AC coupled to the VDD_n (1.8 V) supply with amplitude = 25 mVp-p measured at the device VDD_n pins. Bit error rate
testing of input to the Ser and output of the Des with 10-meter cable shows no error when the noise frequency on the Ser is less than 1
MHz. The Des on the other hand shows no error when the noise frequency is less than 750 kHz.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
7
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
7.4 Thermal Information
DS90UB914A-Q1
THERMAL METRIC (1)
RHS (WQFN)
UNIT
48 PINS
RθJA
Junction-to-ambient thermal resistance
29.7
RθJC(top)
Junction-to-case (top) thermal resistance
10.9
RθJB
Junction-to-board thermal resistance
6.7
ψJT
Junction-to-top characterization parameter
0.1
ψJB
Junction-to-board characterization parameter
6.7
RθJC(bot)
Junction-to-case (bottom) thermal resistance
2.3
(1)
°C/W
For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
7.5 Electrical Characteristics (1) (2) (3)
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
LVCMOS DC SPECIFICATIONS 3.3V I/O (DES OUTPUTS, GPIO, CONTROL INPUTS AND OUTPUTS)
VIH
High Level Input Voltage
VIN = 3 V to 3.6 V
2
VIL
Low Level Input Voltage
VIN = 3 V to 3.6 V
GND
IIN
Input Current
VIN = 0 V or 3.6 V, VIN = 3 V to 3.6 V
VOH
High Level Output Voltage VDDIO = 3 V to 3.6 V, IOH = −4 mA
VOL
Low Level Output Voltage
Output Short Circuit
Current
VOUT = 0 V
IOZ
TRI-STATE Output
Current
PDB = 0 V,
VOUT = 0 V or VDD
CGPIO
Pin Capacitance
GPIO [3:0]
IOS
V
20
µA
2.4
VDDIO
V
GND
0.4
V
±1
Deserializer
GPO Outputs
–15
LVCMOS Outputs
–35
LVCMOS Outputs,
GPO Outputs
V
0.8
–20
VDDIO = 3 V to 3.6 V, IOL = 4 mA
VIN
–20
mA
20
1.5
µA
pF
LVCMOS DC SPECIFICATIONS 1.8V I/O (DES OUTPUTS, GPIO, CONTROL INPUTS AND OUTPUTS)
VIH
High Level Input Voltage
VIN = 1.71 V to 1.89 V
0.65 VIN
VIN
VIL
Low Level Input Voltage
VIN = 1.71 V to 1.89 V
GND
0.35 VIN
IIN
Input Current
VIN = 0 V or 1.89 V, VIN = 1.71 V to 1.89 V
VOH
High Level Output Voltage VDDIO = 1.71 V to 1.89 V, IOH = −4 mA
VOL
Low Level Output Voltage
VOUT = 0 V
IOZ
TRI-STATE Output
Current
PDB = 0 V,
VOUT = 0 V or VDD
CGPIO
Pin Capacitance
GPIO [3:0]
(1)
(2)
(3)
8
20
µA
VDDIO - 0.45
VDDIO
V
GND
0.45
V
VDDIO = 1.71 V to 1.89 V IOL = 4 mA
Output Short Circuit
Current
IOS
–20
±1
V
Deserializer
GPO Outputs
–11
LVCMOS Outputs
–17
LVCMOS Outputs,
GPO Outputs
-20
mA
20
1.5
µA
pF
The Electrical Characteristics tables list verified specifications under the listed Recommended Operating Conditions except as otherwise
modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not
verified.
Current into device pins is defined as positive. Current out of a device pin is defined as negative. Voltages are referenced to ground
except VOD, ΔVOD, VTH and VTL which are differential voltages.
Typical values represent most likely parametric norms at 1.8 V or 3.3 V, TA = 25°C, and at the Recommended Operation Conditions at
the time of product characterization and are not verified.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Electrical Characteristics(1)(2)(3) (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
–20
1
20
UNIT
CML RECEIVER DC SPECIFICATIONS (RIN0+,RIN0–,RIN1+,RIN1– )
IIN
Input Current
VIN = VDD or 0 V, VDD = 1.89 V,
Differential Internal
Termination Resistance
Differential across RIN+ and RIN–
80
100
120
Single-ended
Termination Resistance
RIN+ or RIN–
40
50
60
VID
Differential Input Voltage
Back Channel Disabled, (Figure 3)
210
mV
VIN
Single-Ended Input
Voltage
Back Channel Disabled, (Figure 3)
105
mV
VOD-BC
Back Channel Differential
Output Voltage
350
540
mV
VOUT-BC
Back Channel SingleEnded Output Voltage
175
270
mV
RT
µA
Ω
CML MONITOR OUTPUT DRIVER SPECIFICATIONS(CMLOUTP, CMLOUTN)
Ew
Differential Output
Eye Opening (4)
EH
Differential Output
Eye Height
(4)
RL = 100 Ω
Jitter Frequency > f/40 (Figure 8)
0.45
UI
200
mV
UI – Unit Interval is equivalent to one ideal serialized data bit width. The UI scales with PCLK frequency.
10-bit mode: 1 UI = 1 / ( PCLK_Freq. /2 x 28 )
12-bit HF mode: 1 UI = 1 / ( PCLK_Freq. x 2/3 x 28 )
12-bit LF mode: 1 UI = 1 / ( PCLK_Freq. x 28 )
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
9
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Electrical Characteristics(1)(2)(3) (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
f = 100 MHz,
10–bit mode
22
42
f = 75 MHz, 12–bit
high freq mode
19
39
f = 50 MHz, 12–bit
low freq mode
16
32
f = 100 MHz,
10–bit mode
15
f = 75 MHz, 12–bit
high freq mode
12
f = 50 MHz, 12–bit
low freq mode
10
f = 100 MHz,
10–bit mode
42
55
f = 75 MHz, 12–bit
high freq mode
37
50
f = 50 MHz, 12–bit
low freq mode
25
38
f = 100 MHz,
10–bit mode
35
f = 75 MHz, 12–bit
high freq mode
30
f = 50 MHz, 12–bit
low freq mode
18
f = 100 MHz,
10–bit mode
15
f = 75 MHz, 12–bit
high freq mode
11
f = 50 MHz, 12–bit
low freq mode
16
UNIT
DESERIALIZER SUPPLY CURRENT
VDDIO=1.89 V
CL=8 pF
Worst Case Pattern
VDDIO=1.89 V
CL=8 pF
Random Pattern
VDDIO=3.6 V
CL=8 pF
Worst Case Pattern
VDDIO= 3.6 V
CL= 8 pF
Random Pattern
IDDIOR
Deserializer (Rx)
Total Supply Current
(includes load current)
VDDIO= 1.89 V
CL= 4 pF
Worst Case Pattern
VDDIO= 1.89 V
CL= 4 pF
Random Pattern
VDDIO= 3.6 V
CL= 4 pF
Worst Case Pattern
VDDIO= 3.6 V
CL= 4 pF
Random Pattern
10
f = 100 MHz,
10–bit mode
8
f = 75 MHz, 12–bit
high freq mode
4
f = 50 MHz, 12–bit
low freq mode
9
f = 100 MHz,
10–bit mode
36
f = 75 MHz, 12–bit
high freq mode
29
f = 50 MHz, 12–bit
low freq mode
20
f = 100 MHz, 10–bit
mode
29
f = 75 MHz, 12–bit
high freq mode
22
f = 50 MHz, 12–bit
low freq mode
13
Submit Documentation Feedback
mA
mA
mA
mA
mA
mA
mA
mA
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Electrical Characteristics(1)(2)(3) (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
TEST CONDITIONS
TYP
MAX
f = 100 MHz,
10–bit mode
64
110
f = 75 MHz,
12–bit high freq
mode
67
114
f = 50 MHz,
12–bit low freq mode
63
96
f = 100 MHz,
10–bit mode
69
f = 75 MHz,
12–bit high freq
mode
71
f = 50 MHz,
12–bit low freq mode
67
PDB = 0 V, All other
LVCMOS Inputs=0 V
VDDIO = 1.89 V
Default Registers
42
900
PDB = 0 V, All other
LVCMOS Inputs = 0 V
VDDIO=3.6 V
Default Registers
42
900
VDD_n = 1.89 V
CL= 4 pF
Worst Case Pattern
IDDR
Deserializer (Rx) VDD_n
Supply Current (includes
load current)
VDD_n= 1.89 V
CL= 4 pF
Random Pattern
IDDRZ
IDDIORZ
Deserializer (Rx) Supply
Current Power Down
Deserializer (Rx) VDDIO
Supply Current Power
Down
PDB = 0 V, All other
LVCMOS Inputs = 0 V
VDDIO = 1.89 V
VDDIO = 3.6 V
MIN
mA
µA
8
40
360
800
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
UNIT
µA
11
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
7.6 AC Timing Specifications (SCL, SDA) - I2C-Compatible
Over recommended supply and temperature ranges unless otherwise specified. (Figure 1)
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
UNIT
Standard Mode
100
kHz
Fast Mode
400
kHz
RECOMMENDED INPUT TIMING REQUIREMENTS
fSCL
tLOW
SCL Clock Frequency
SCL Low Period
Standard Mode
4.7
µs
Fast Mode
1.3
µs
Standard Mode
4.0
µs
Fast Mode
0.6
µs
tHIGH
SCL High Period
tHD:STA
Hold time for a start or a repeated start
condition
Standard Mode
4.0
µs
Fast Mode
0.6
µs
Set Up time for a start or a repeated
start condition
Standard Mode
4.7
µs
Fast Mode
0.6
tSU:STA
tHD:DAT
tSU:DAT
Data Hold Time
Data Set Up Time
tSU:STO
Set Up Time for STOP Condition
tBUF
Bus Free time between Stop and Start
tr
tf
12
SCL & SDA Rise Time
SCL & SDA Fall Time
µs
Standard Mode
0
3.45
µs
Fast Mode
0
900
ns
Standard Mode
250
Fast Mode
100
ns
Standard Mode
4.0
µs
Fast Mode
0.6
µs
Standard Mode
4.7
µs
Fast Mode
1.3
Standard Mode
ns
µs
1000
ns
Fast Mode
300
ns
Standard Mode
300
ns
Fast Mode
300
ns
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Bidirectional Control Bus DC Timing Specifications (SCL, SDA) - I2C-Compatible (1)
7.7
Over recommended supply and temperature ranges unless otherwise specified
PARAMETER
TEST CONDITIONS
MIN
NOM
MAX
UNIT
V
RECOMMENDED INPUT TIMING REQUIREMENTS
VIH
Input High Level
SDA and SCL
0.7*VDDIO
VDDIO
VIL
Input Low Level
SDA and SCL
GND
0.3*VDDIO
VHY
Input Hysteresis
VOL
Output Low Level (2)
IIN
Input Current
SDA or SCL, VIN= VDDIO OR GND
tR
SDA Rise Time-READ
ns
SDA Fall Time-READ
SDA, RPU = 10 kΩ, Cb ≤ 400 pF
(Figure 1)
430
tF
20
ns
tSU;DAT
(See Figure 1)
560
ns
tHD;DAT
(See Figure 1)
615
ns
>50
SDA, VDDIO = 1.8V, IOL= 0.9 mA
0
0.36
SDA, VDDIO = 3.3V, IOL= 1.6 mA
0
0.4
−10
10
tSP
CIN
(1)
(2)
SDA or SCL
V
mV
V
µA
50
ns
<5
pF
Specification is verified by design.
FPD-Link device was designed primarily for point-to-point operation and a small number of attached slave devices. As such the
Minimum IOL pullup current is targeted to lower value than the minimum IOL in the I2C specification.
SDA
tf
tHD;STA
tLOW
tr
tBUF
tf
tr
SCL
tSU;STA
tHD;STA
tHIGH
tSU;STO
tSU;DAT
tHD;DAT
START
STOP
REPEATED
START
START
Figure 1. Bi-directional Control Bus Timing
Signal Pattern
Device Pin Name
T
PCLK
(RFB = H)
DIN/ROUT
Figure 2. “Worst Case” Test Pattern for Power Consumption
Single Ended
RIN+ or RIN-
VIN
VIN
0V
Differential
(RIN+) - (RIN-)
VID
0V
Figure 3. Deserializer VID Diagram
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
13
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
PDB
www.ti.com
VDDIO/2
| |
tDDLT
RIN±
LOCK
TRI-STATE
|
VDDIO/2
Figure 4. Deserializer Data Lock Time
80%
80%
Deserializer
20%
8 pF
lumped
20%
tCHL
tCLH
Copyright © 2016, Texas Instruments Incorporated
SYMBOL N + 3
SYMBOL N + 3
| |
SYMBOL N + 2
| |
0V
| |
SYMBOL N + 1
| |
SYMBOL N
RIN±
| |
Figure 5. Deserializer LVCMOS Output Load and Transition Times
tDD
PCLK
SYMBOL N - 1
| ||
SYMBOL N - 2
| ||
SYMBOL N - 3
| ||
| ||
| ||
ROUTn
VDDIO/2
SYMBOL N
SYMBOL N+1
Figure 6. Deserializer Delay
tRCP
PCLK
VDDIO
1/2 VDDIO
1/2 VDDIO
0V
VDDIO
ROUT[n],
VS, HS
1/2 VDDIO
1/2 VDDIO
0V
tROS
tROH
Figure 7. Deserializer Output Setup/Hold Times
Ew
VOD (+)
EH
0V
EH
VOD (-)
tBIT (1 UI)
Figure 8. CML Output Driver
14
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
PDB= H
VIH
OEN
VIL
VIH
OSS_SEL
VIL
RIN
(Diff.)
'RQ¶W &DUH
tSEH
tONS
LOCK
tSES
TRI-STATE
TRI-STATE
tONH
LOW
PASS
ACTIVE
HIGH
ROUT[0:11],
HS, VS
TRI-STATE
LOW
PCLK
(RFB = L)
TRI-STATE
LOW
TRI-STATE
LOW
HIGH
HIGH
ACTIVE
ACTIVE
LOW
TRI-STATE
LOW
TRI-STATE
Figure 9. Output State (Setup and Hold) Times
Frequency
fdev (max)
FPCLK+
fdev
FPCLK
fdev (min)
FPCLK-
Time
1 / fmod
Figure 10. Spread Spectrum Clock Output Profile
7.8 Deserializer Switching Characteristics
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
TEST CONDITIONS
PIN / FREQ
10-bit mode
50 MHz – 100 MHz
tRCP
Receiver Output
Clock Period (1)
12-bit high frequency mode
37.5 MHz - 75MHz
PCLK (Figure 7)
12-bit low frequency mode
25 MHz - 50MHz
10-bit mode
50 MHz – 100 MHz
tPDC
PCLK Duty Cycle
12-bit high frequency mode
37.5 MHz - 75MHz
PCLK
12-bit low frequency mode
25 MHz - 50MHz
(1)
MIN
NOM
MAX
10
T
20
13.33
T
26.67
20
T
40
45%
50%
55%
40%
50%
60%
40%
50%
60%
UNIT
ns
T is the period of the PCLK.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
15
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Deserializer Switching Characteristics (continued)
Over recommended operating supply and temperature ranges unless otherwise specified.
PARAMETER
TEST CONDITIONS
PIN / FREQ
LVCMOS Low-toVDDIO: 1.71 V to 1.89 V or 3 V
High Transition Time to 3.6 V, CL = 8 pF
(lumped load)
LVCMOS High-to(2)
Low Transition Time Default Registers (Figure 5)
PCLK
ROUT[11:0], HS, VS
tCHL
LVCMOS Low-toVDDIO: 1.71 V to 1.89 V or 3 V
High Transition Time to 3.6 V, CL = 8 pF
(lumped load)
LVCMOS High-to(2)
Low Transition Time Default Registers (Figure 5)
tROS
ROUT Setup
Data to PCLK
(1)
ROUT Hold
Data to PCLK
(1)
tCLH
tCHL
tCLH
tROH
VDDIO: 1.71 V to 1.89 V or 3 V
to 3.6 V, CL = 8 pF (lumped
load), Default Registers
(Figure 7)
tDD
Deserializer Delay
tDDLT
tRCJ
Deserializer Data
Lock Time
Receiver Clock Jitter
Deserializer Period
Jitter
tDPJ
tDCCJ
Deserializer Cycleto-Cycle Clock Jitter
fdev
Spread Spectrum
Clocking Deviation
Frequency
fmod
Spread Spectrum
Clocking Modulation
Frequency
(2)
(3)
(4)
16
12–bit low frequency
Default Registers
mode
Register 0x03h b[0] (RRFB = 1)
25 - 50 MHz
(Figure 6) (2)
12–bit high frequency
mode
37.5 - 75 MHz
With Adaptive Equalization
(Figure 4)
PCLK
SSCG[3:0] = OFF (2)
PCLK
SSCG[3:0] = OFF (2)
PCLK
SSCG[3:0] = OFF (2)
(3)
(4)
NOM
MAX
1.3
2
2.8
1.3
2
2.8
1
2.5
4
1
2.5
4
0.38T
0.5T
0.38T
0.5T
UNIT
ns
ns
ROUT[11:0], HS, VS
10–bit mode
50 - 100 MHz
(1)
MIN
ns
154T
158T
109T
112T
73T
75T
10–bit mode
50 - 100 MHz
15
22
12–bit low frequency
mode
25 - 50 MHz
15
22
12–bit high frequency
mode
37.5 - 75 MHz
15
22
10–bit mode
PCLK = 100 MHz
20
30
12–bit low frequency
mode, PCLK = 50 MHz
22
35
12–bit high frequency
mode, PCLK = 75 MHz
45
90
10–bit mode
PCLK = 100 MHz
170
815
12–bit low frequency
mode, PCLK = 50 MHz
180
330
12–bit high frequency
mode, PCLK = 75 MHz
300
515
10–bit mode
PCLK = 100 MHz
440
1760
12–bit low frequency
mode, PCLK = 50 MHz
460
730
12–bit high frequency
mode, PCLK = 75 MHz
565
985
25 MHz – 100 MHz
±0.5% to
±1.5%
25 MHz – 100 MHz
5 to 50
LVCMOS Output Bus
SSC[3:0] = ON (Figure 10) (2)
ns
ms
ps
ps
ps
kHz
Specification is verified by characterization and is not tested in production.
tDPJ is the maximum amount of jitter measured over 30,000 samples based on Time Interval Error (TIE).
tDCCJ is the maximum amount of jitter between adjacent clock cycles measured over 30,000 samples.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
7.9 Typical Characteristics
JITTER AMPLITUDE (UI)
0.65
0.60
0.55
0.50
0.45
1E+04
1E+05
1E+06
1E+07
JITTER FREQUENCY (Hz)
Figure 11. Typical Deserializer Input Jitter Tolerance Curve at 1.4-Gbps Line Rate (1)
(1)
Jitter amplitude max ( ~ 0.6 UI) is limited by instrumentation and actual jitter amplitude max of in-band jitter at low frequency ( < 2 MHz)
is greater than 1 UI.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
17
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
8 Detailed Description
8.1 Overview
The DS90UB913A-Q1 is optimized to interface with the DS90UB914A-Q1 using a 50-Ω coax interface. The
DS90UB913A-Q1 will also work with the DS90UB914A-Q1 using an STP interface.
The DS90UB913A/914A FPD- Link III chipsets are intended to link mega-pixel camera imagers and video
processors in ECUs. The Serializer/Deserializer chipset can operate from 25 MHz to 100 MHz pixel clock
frequency. The DS90UB913A-Q1 device transforms a 10/12-bit wide parallel LVCMOS data bus along with a
bidirectional control channel control bus into a single high-speed differential pair. The high speed serial bit stream
contains an embedded clock and DC-balanced information which enhances signal quality to support AC
coupling. The DS90UB914A-Q1 device receives the single serial data stream and converts it back into a 10/12bit wide parallel data bus together with the control channel data bus. The DS90UB913A/914A chipsets can
accept up to:
• 12-bits of DATA + 2 bits SYNC for an input PCLK range of 25 MHz to 50 MHz in the 12-bit low frequency
mode. Note: No HS/VS restrictions (raw).
• 12-bits of DATA + 2 SYNC bits for an input PCLK range of 37.5 MHz to 75 MHz in the 12-bit high frequency
mode. Note: No HS/VS restrictions (raw).
• 10-bits of DATA + 2 SYNC bits for an input PCLK range of 50 MHz to 100 MHz in the 10-bit mode. Note:
HS/VS restricted to no more than one transition per 10 PCLK cycles.
The DS90UB914A-Q1 device has a 2:1 multiplexer which allows customers to select between two Serializer
inputs. The control channel function of the DS90UB913A/DS90UB914A-Q1 chipset provides bidirectional
communication between the image sensor and ECUs. The integrated bidirectional control channel transfers data
bidirectionally over the same differential pair used for video data interface. This interface offers advantages over
other chipsets by eliminating the need for additional wires for programming and control. The bidirectional control
channel bus is controlled via an I2C port. The bidirectional control channel offers asymmetrical communication
and is not dependent on video blanking intervals.
The DS90UB913A/914A chipset offer customers the choice to work with different clocking schemes. The
DS90UB913A/914A chipsets can use an external oscillator as the reference clock source for the PLL (see
section DS90UB913A/914A Operation with External Oscillator as Reference Clock) or PCLK from the imager as
primary reference clock to the PLL (see section DS90UB913A/914A Operation with Pixel Clock from Imager as
Reference Clock).
8.2 Functional Block Diagram
RIN0+ RT
RT
GPO[3:0]
PCLK
PLL
RIN0-
2:1
DOUT-
Output Latch
DOUT+
Decoder
RT
Deserializer
RT
Adaptive Eq.
Serializer
4
Encoder
DIN
HSYNC
VSYNC
Input Latch
10 or
12
10
or
12
ROUT
HSYNC
VSYNC
4
GPIO[3:0]
RIN1+
Clock
Gen
PCLK
LOCK
Clock
Gen
CDR
PASS
RIN1PDB
BISTEN
Encoder
Encoder
ID[x]
MODE
SEL
Decoder
SCL
FIFO
SDA
I2C Controller
OEN
MODE
DS90UB913AQ - SERIALIZER
I2C
Controller
Timing and
Control
FIFO
Timing and
Control
Decoder
PDB
SDA
SCL
IDx[0]
IDx[1]
DS90UB914AQ - DESERIALIZER
Copyright © 2016, Texas Instruments Incorporated
18
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
8.3 Feature Description
8.3.1 Serial Frame Format
The High Speed Forward Channel is composed of 28 bits of data containing video data, sync signals, I2C and
parity bits. This data payload is optimized for signal transmission over an AC-coupled link. Data is randomized,
balanced and scrambled. The 28-bit frame structure changes in the 12-bit low frequency mode, 12-bit high
frequency mode and the 10-bit mode internally and is seamless to the customer. The bidirectional control
channel data is transferred over the single serial link along with the high-speed forward data. This architecture
provides a full duplex low speed forward and backward path across the serial link together with a high speed
forward channel without the dependence on the video blanking phase.
8.3.2 Line Rate Calculations for the DS90UB913A/914A
The DS90UB913A-Q1 device divides the clock internally by divide-by-1 in the 12-bit low frequency mode, by
divide-by-2 in the 10-bit mode and by divide-by-1.5 in the 12-bit high frequency mode. Conversely, the
DS90UB914A-Q1 multiplies the recovered serial clock to generate the proper pixel clock output frequency. Thus
the maximum line rate in the three different modes remains 1.4 Gbps. The following are the formulae used to
calculate the maximum line rate in the different modes:
• For the 12-bit low frequency mode, Line rate = fPCLK*28; for example, fPCLK = 50 MHz, line rate = 50*28 = 1.4
Gbps
• For the 12-bit high frequency mode, Line rate = fPCLK*(2/3)*28; for example, fPCLK = 75 MHz, line rate =
(75)*(2/3)*28 = 1.4 Gbps
• For the 10-bit mode, Line rate = fPCLK/2*28; for example, fPCLK = 100 MHz, line rate = (100/2)*28 = 1.4 Gbps
8.3.3 Deserializer Multiplexer Input
The DS90UB914A-Q1 offers a 2:1 multiplexer that can be used to select which camera is used as the input.
Figure 12 shows the operation of the 2:1 multiplexer in the Deserializer. The selection of the camera can be pin
controlled as well as register controlled. Both the Deserializer inputs cannot be enabled at the same time. If the
Serializer A is selected as the active Serializer, the back-channel for Deserializer A turns ON and vice versa. To
switch between the two cameras, first the Serializer B has to be selected using the SEL pin/register on the
Deserializer. After that the back channel driver for Deserializer B has to be enabled using the register in the
Deserializer.
Camera A
DATA
PCLK
DATA
PCLK
2
I C
Camera B
GPIO
GPIO
FSYNC
CMOS
Image
Sensor
Deserializer
2:1
CMOS
Image
Sensor
Serializer A
FSYNC
I2C
ECU
Module
Serializer B
DATA
PCLK
GPIO
FSYNC
2
I C
PC
Copyright © 2016, Texas Instruments Incorporated
Figure 12. Using the Multiplexer on the Deserializer to Enable a Two-Camera System
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
19
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Feature Description (continued)
8.3.4 Error Detection
The chipset provides error detection operations for validating data integrity in long distance transmission and
reception. The data error detection function offers users flexibility and usability of performing bit-by-bit data
transmission error checking. The error detection operating modes support data validation of the following signals:
• Bidirectional control channel data across the serial link
• Parallel video/sync data across the serial link
The chipset provides 1 parity bit on the forward channel and 4 cyclic redundancy check (CRC) bits on the back
channel for error detection purposes. The DS90UB913A/914A chipset checks the forward and back channel
serial links for errors and stores the number of detected errors in two 8-bit registers in the Serializer and the
Deserializer respectively.
To check parity errors on the forward channel, monitor registers 0x1A and 0x1B on the Deserializer. If there is a
loss of LOCK, then the counters on registers 0x1A and 0x1B are reset. Whenever there is a parity error on the
forward channel, the PASS pin will go low.
To check CRC errors on the back-channel, monitor registers 0x0A and 0x0B on the Serializer.
8.3.5 Synchronizing Multiple Cameras
For applications requiring multiple cameras for frame-synchronization, it is recommended to utilize the General
Purpose Input/Output (GPIO) pins to transmit control signals to synchronize multiple cameras together. To
synchronize the cameras properly, the system controller needs to provide a field sync output (such as a vertical
or frame sync signal) and the cameras must be set to accept an auxiliary sync input. The vertical synchronize
signal corresponds to the start and end of a frame and the start and end of a field. Note this form of
synchronization timing relationship has a non-deterministic latency. After the control data is reconstructed from
the bidirectional control channel, there will be a time variation of the GPIO signals arriving at the different target
devices (between the parallel links). The maximum latency delta (t1) of the GPIO data transmitted across
multiple links is 25 µs.
NOTE
The user must verify that the timing variations between the different links are within their
system and timing specifications.
See Figure 13 for an example of this function.
The maximum time (t1) between the rising edge of GPIO (that is, sync signal) to the time the signal arrives at
Camera A and Camera B is 25 µs.
20
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Feature Description (continued)
Serializer A
Camera A
CMOS
Image
Sensor
Deserializer A
DATA
PCLK
DATA
PCLK
I2C
FSYNC
FSO
GPIO
GPO
FSIN
FSYNC
I2C
ECU
Module
Camera B
CMOS
Image
Sensor
Serializer B
Deserializer B
DATA
PCLK
DATA
PCLK
I2C
FSYNC
FSO
GPIO
GPO
FSIN
FSYNC
I2C
PC
Copyright © 2016, Texas Instruments Incorporated
Figure 13. Synchronizing Multiple Cameras
DES A
GPIO[n] Input
SER B
GPIO[n] Output
|
SER A
GPIO[n] Output
|
DES B
GPIO[n] Input
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.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
21
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Feature Description (continued)
8.3.7 LVCMOS VDDIO Option
1.8-V/3.3-V Deserializer outputs are user configurable to provide compatibility with 1.8-V and 3.3-V system
interfaces.
8.3.8 EMI Reduction
8.3.8.1 Deserializer Staggered Output
The receiver staggers output switching to provide a random distribution of transitions within a defined window.
Outputs transitions are distributed randomly. This minimizes the number of outputs switching simultaneously and
helps to reduce supply noise. In addition it spreads the noise spectrum out reducing overall EMI.
8.3.8.2 Spread Spectrum Clock Generation (SSCG) on the Deserializer
The DS90UB914A-Q1 parallel data and clock outputs have programmable SSCG ranges from 25 MHz to 100
MHz. The modulation rate and modulation frequency variation of output spread is controlled through the SSCG
control registers on the DS90UB914A-Q1 device. SSCG profiles can be generated using bits [3:0] in register
0x02 on the Deserializer.
8.3.9 Pixel Clock Edge Select (TRFB / RRFB)
The TRFB/RRFB selects which edge of the Pixel Clock is used. For the SER, this register determines the edge
that the data is latched on. If TRFB register is 1, data is latched on the Rising edge of the PCLK. If TRFB register
is 0, data is latched on the Falling edge of the PCLK. For the DES, this register determines the edge that the
data is strobed on. If RRFB register is 1, data is strobed on the Rising edge of the PCLK. If RRFB register is 0,
data is strobed on the falling edge of the PCLK.
PCLK
DIN/
ROUT
TRFB/RRFB: 0
TRFB/RRFB: 1
Figure 15. Programmable PCLK Strobe Select
8.3.10 Power Down
The DES has a PDB input pin to ENABLE or power down the device. Enabling PDB on the DES will disable the
link to save power. If PDB = HIGH, the DES locks to the input stream and assert the LOCK pin (HIGH) and
output valid data. When PDB = LOW, all outputs are in TRI-STATE. Please refer to Power-Up Requirements and
PDB Pin for power-up requirements.
8.4 Device Functional Modes
8.4.1 DS90UB913A/914A Operation with External Oscillator as Reference Clock
In some applications, the pixel clock that comes from the imager can have jitter which exceeds the tolerance of
the DS90UB913A/914A chipsets. In this case, the DS90UB913A-Q1 device should be operated by using an
external clock source as the reference clock for the DS90UB913A/914A chipsets. This is the recommended
operating mode. The external oscillator clock output goes through a divide-by-2 circuit in the DS90UB913A-Q1
Serializer and this divided clock output is used as the reference clock for the imager. The output data and pixel
clock from the imager are then fed into the DS90UB913A-Q1 device. Figure 16 shows the operation of the
DS90UB13A/914A chipsets while using an external automotive grade oscillator.
22
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Device Functional Modes (continued)
Serializer
Deserializer
FPD Link IIIHigh Speed
Camera Data
DOUT+
10 or 12
Image
Sensor
DATA
HSYNC
DIN[11:0] or
DIN[9:0]
HSYNC,
VSYNC
DOUT-
VSYNC
Pixel Clock
Camera Data
RIN+
RIN-
Bi-Directional
Control Channel
PCLK
10 or 12
ROUT[11:0]
or
ROUT[9:0]
HSYNC,
VSYNC
PCLK
DATA
HSYNC
VSYNC
Pixel Clock
ECU Module
SDA
SDA
SCL
2
SCL
PLL
GPO[1:0]
GPIO[3:0]
GPO[1:0]
SDA
Camera Unit
SCL
Reference Clock
(Ext. OSC/2)
4
GPO[3:0]
Microcontroller
SDA
SCL
GPO3
÷2
GPO2
External
Oscillator
Copyright © 2016, Texas Instruments Incorporated
Figure 16. DS90UB913A-Q1/914A-Q1 Operation in the External Oscillator Mode
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
23
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Device Functional Modes (continued)
When the DS90UB913A-Q1 device is operated using an external oscillator, the GPO3 pin on the DS90UB913AQ1 is the input pin for the external oscillator. In applications where the DS90UB913A-Q1 device is operated from
an external oscillator, the divide-by-2 circuit in the DS90UB913A-Q1 device feeds back the divided clock output
to the imager device through GPO2 pin. The pixel clock to external oscillator ratios needs to be fixed for the
12–bit high frequency mode and the 10–bit mode. In the 10-bit mode, the pixel clock frequency divided by
the external oscillator frequency must be 2. In the 12-bit high frequency mode, the pixel clock frequency
divided by the external oscillator frequency must be 1.5. For example, if the external oscillator frequency is
48 MHz in the 10–bit mode, the pixel clock frequency of the imager needs to be twice of the external oscillator
frequency, that is, 96 MHz. If the external oscillator frequency is 48MHz in the 12-bit high frequency mode, the
pixel clock frequency of the imager needs to be 1.5 times of the external oscillator frequency, that is, 72 MHz. In
external oscillator mode, GPO2 and GPO3 on the Serializer cannot act as the output of the input signal coming
from GPIO2 or GPIO3 on the Deserializer.
8.4.2 DS90UB913A/914A Operation with Pixel Clock from Imager as Reference Clock
The DS90UB913A/914A chipsets can be operated by using the pixel clock from the imager as the reference
clock. Figure 17 shows the operation of the DS90UB913A/914A chipsets using the pixel clock from the imager. If
the DS90UB913A-Q1 device is operated using the pixel clock from the imager as the reference clock, then the
imager uses an external oscillator as its reference clock. There are 4 GPIOs available in this mode (PCLK from
imager mode).
Serializer
Deserializer
FPD-Link III
Camera Data
Image
Sensor
YUV
HSYNC
VSYNC
SDA
SCL
4
Camera Data
DOUT+
10 or 12
DIN[11:0] or
DIN[9:0]
FV,LV
ROUT[11:0]
or
ROUT[9:0]
FV, LV
DOUT-
RIN0-
Bi-Directional
Back Channel
SDA
SCL
10 or 12
RIN0+
VSYNC
PCLK
Camera Unit
Pixel Clock
ECU Module
RIN1+
GPO[3:0]
GPIO[3:0]
GPO
Pixel Clock
YUV
HSYNC
PLL
RIN1-
4
GPIO
SDA
PCLK
SCL
Microcontroller
SDA
SCL
Ext.
Oscillator
Copyright © 2016, Texas Instruments Incorporated
Figure 17. DS90UB913A-Q1/914A-Q1 Operation in PCLK mode
24
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Device Functional Modes (continued)
8.4.3 MODE Pin on Deserializer
The MODE pin on the Deserializer can be used to configure the device to work in the 12-bit low-frequency mode,
12-bit high-frequency mode, or the 10-bit mode of operation. Internally, the DS90UB913A/914A chipset operates
in a divide-by-1 mode in the 12-bit low-frequency mode, divide-by-2 mode in the 10-bit mode and a divide-by-1.5
mode in the 12-bit high frequency mode. The pin must be pulled to VDD (1.8 V, not VDDIO) with a 10-kΩ resistor
and a pull-down resistor RMODE of the recommended value to set the different modes in the Deserializer as
mentioned in Table 1. The Deserializer automatically configures the Serializer to correct mode via the backchannel. The recommended maximum resistor tolerance is 1%.
.
1.8 V
10 k
MODE
RMODE
Deserializer
Copyright © 2016, Texas Instruments Incorporated
Figure 18. Mode Pin Configuration on DS90UB914A-Q1 Deserializer
Table 1. DS90UB914A-Q1 Deserializer MODE Resistor Value
DS90UB914A-Q1 DESERIALIZER MODE RESISTOR VALUE
MODE SELECT
RMODE RESISTOR VALUE (kΩ)
12-bit low frequency mode 25-50 MHz PCLK, 10/12-bits DATA+ 2 SYNC.
Note: No HS/VS restrictions (raw).
0
12-bit high frequency mode 37.5-75 MHz PCLK, 10/12-bits DATA+ 2 SYNC.
Note: No HS/VS restrictions (raw).
3
10-bit mode 50–100 MHz PCLK, 10-bits DATA+ 2 SYNC.
Note: HS/VS restricted to no more than one transition per 10 PCLK cycles.
11
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
25
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
8.4.4 Clock-Data Recovery Status Flag (LOCK), Output Enable (OEN) and Output State Select
(OSS_SEL)
When PDB is driven HIGH, the Deserializer’s CDR PLL begins locking to the serial input and LOCK is TRISTATE or LOW (depending on the value of the OEN setting). After the DS90UB914A-Q1 completes its lock
sequence to the input serial data, the LOCK output is driven HIGH, indicating valid data and clock recovered
from the serial input is available on the parallel bus and PCLK outputs. The states of the outputs are based on
the OEN and OSS_SEL setting (Table 2). See Figure 9.
Table 2. Output States
INPUTS
26
OUTPUTS
SERIAL
INPUTS
PDB
OEN
OSS_SEL
X
0
X
X
1
0
X
1
0
LOCK
PASS
DATA, GPIO
CLK
X
Z
Z
Z
Z
0
L or H
L
L
L
1
L or H
Z
Z
Z
Static
1
1
0
L
L
L
L/Osc
(Register Bit Enable)
Static
1
1
1
L
Previous State
L
L
Active
1
1
0
H
L
L
L
Active
1
1
1
H
Valid
Valid
Valid
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
8.4.5 Built In Self Test
An optional At-Speed Built In Self Test (BIST) feature supports the testing of the high-speed serial link and lowspeed back channel. This is useful in the prototype stage, equipment production, and in-system test and also for
system diagnostics.
8.4.6 BIST Configuration and Status
The chipset can be programmed into BIST mode using either pins or registers on the DES only. By default, BIST
configuration is controlled through pins. BIST can be configured via registers using BIST Control register (0x24).
Pin-based configuration is defined as follows:
• BISTEN = HIGH: Enable the BIST mode, BISTEN = LOW: Disable the BIST mode.
• Deserializer GPIO0 and GPIO1: Defines the BIST clock source (PCLK vs. various frequencies of internal
OSC)
Table 3. BIST Pin Configuration
DESERIALIZER GPIO[0:1]
OSCILLATOR SOURCE
BIST FREQUENCY (MHz)
00
External PCLK
PCLK or External Oscillator
01
Internal
~50
10
Internal
~25
Table 4. BIST Register Configuration
DS90UB914A-Q1
Reg 0x24 [2:1]
10–BIT
MODE
12–BIT
HIGH-FREQUENCY MODE
12–BIT
LOW-FREQUENCY MODE
00
PCLK
PCLK
PCLK
01
100 MHz
75 MHz
50 MHz
10
50 MHz
37.5 MHz
25 MHz
11
25 MHz
-
-
BIST mode provides various options for the PCLK source. Either external pins (GPIO0 and GPIO1) or registers
can be used to program the BIST to use external PCLK or various OSC frequencies. Refer to Table 3 for pin
settings and refer to Table 6 for register settings. The BIST status can be monitored real-time on the PASS pin.
For every frame with error(s), the PASS pin toggles low for one-half PCLK period. If two consecutive frames
have errors, PASS will toggle twice to allow counting of frames with errors. Once the BIST is done, the PASS pin
reflects the pass/fail status of the last BIST run only for one PCLK cycle. The status can also be read through
I2C for the number of frames in errors. BIST status register retains results until it is reset by a new BIST session
or a device reset. To evaluate BIST in external oscillator mode, both the external oscillator and PCLK need to be
present. For all practical purposes, the BIST status can be monitored from the BIST Error Count register 0x25 on
the DS90UB914A Deserializer.
8.4.7 Sample BIST Sequence
Step 1. For the DS90UB913A/914A FPD-Link III chipset, BIST Mode is enabled via the BISTEN pin of
DS90UB914A-Q1 FPD-Link III deserializer. The desired clock source is selected through the deserializer GPIO0
and GPIO1 pins as shown in Table 3.
Step 2. The DS90UB913A-Q1 Serializer BIST pattern is enabled through the back channel. The BIST pattern is
sent through the FPD-Link III to the deserializer. Once the serializer and deserializer are in the BIST mode and
the deserializer acquires Lock, the PASS pin of the deserializer goes high and BIST starts checking FPD-Link III
serial stream. If an error in the payload is detected, the PASS pin will switch low for one half of the clock period.
During the BIST test, the PASS output can be monitored and counted to determine the payload error rate.
Step 3. To stop the BIST mode, the deserializer BISTEN pin is set LOW. The deserializer stops checking the
data. The final test result is not maintained on the PASS pin. To monitor the BIST status, check the BIST Error
Count register, 0x25 on the Deserializer.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
27
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Step 4. The link returns to normal operation after the deserializer BISTEN pin is low. Figure 20 shows the
waveform diagram of a typical BIST test for two cases. Case 1 is error free, and Case 2 shows one with multiple
errors. In most cases, it is difficult to generate errors due to the robustness of the link (differential data
transmission etc.), thus they may be introduced by greatly extending the cable length, faulting the interconnect,
or by reducing signal condition enhancements (Rx equalization).
Normal
Step 1: DES in BIST
BIST
Wait
Step 2: Wait, SER in BIST
BIST
start
Step 3: DES in Normal
Mode - check PASS
BIST
stop
Step 4: DES/SER in Normal
Figure 19. AT-Speed BIST System Flow Diagram
DES Outputs
BISTEN
(DES)
LOCK
PCLK
(RFB = L)
Case 1 - Pass
ROUT[0:11],
HS, VS
DATA
(internal)
PASS
Prior Result
PASS
PASS
X
X
X
FAIL
Prior Result
Normal
Case 2 - Fail
X = bit error(s)
DATA
(internal)
BIST Test
BIST Duration
BIST
Result
Held
Normal
Figure 20. BIST Timing Diagram
28
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
8.5 Programming
8.5.1 Programmable Controller
An integrated I2C slave controller is embedded in the DS90UB914A-Q1 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.
8.5.2 Description of Bidirectional Control Bus and I2C Modes
The I2C-compatible interface allows programming of the DS90UB913A-Q1, DS90UB914A-Q1, or an external
remote device (such as image sensor) through the bidirectional control channel. Register programming
transactions to/from the DS90UB913A-Q1/914A-Q1 chipset are employed through the clock (SCL) and data
(SDA) lines. These two signals have open drain I/Os and both lines must be pulled-up to VDDIO by an external
resistor. Pullup resistors or current sources are required on the SCL and SDA busses to pull them high when
they are not being driven low. A logic LOW is transmitted by driving the output low. Logic HIGH is transmitted by
releasing the output and allowing it to be pulled-up externally. The appropriate pullup resistor values will depend
upon the total bus capacitance and operating speed. The DS90UB913A/914A I2C bus data rate supports up to
400 kbps according to I2C fast mode specifications.
Bus Activity:
Master
SDA Line
S
Stop
Start
For further description of general I2C communication, please refer to application note Understanding the I2C Bus
(SLVA704). For more information on choosing appropriate pullup resistor values, please refer to application note
I2C Bus Pullup Resistor Calculation (SLVA689).
Register
Address
Slave
Address
7-bit Address
Data
P
0
A
C
K
A
C
K
A
C
K
Bus Activity:
Slave
S
Register
Address
Slave
Address
7-bit Address
S
0
A
C
K
Bus Activity:
Slave
N
A
C
K
Slave
Address
7-bit Address
A
C
K
Stop
SDA Line
Start
Bus Activity:
Master
Start
Figure 21. Write Byte
P
1
A
C
K
Data
Figure 22. Read Byte
SDA
1
2
6
MSB
LSB
R/W
Direction
Bit
Acknowledge
from the Device
7-bit Slave Address
SCL
ACK
LSB
MSB
7
8
9
N/ACK
Data Byte
*Acknowledge
or Not-ACK
1
2
8
Repeated for the Lower Data Byte
and Additional Data Transfers
START
9
STOP
Figure 23. Basic Operation
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
29
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Programming (continued)
SDA
SCL
S
P
STOP condition
START condition, or
START repeat condition
Figure 24. Start and Stop Conditions
8.5.3 I2C Pass-Through
I2C pass-through provides a way to access remote devices at the other end of the FPD-Link III interface. This
option is used to determine if an I2C instruction is transferred over to the remote I2C bus. For example, when the
I2C master is connected to the deserializer and I2C pass-through is enabled on the deserializer, any I2C traffic
targeted for the remote serializer or remote slave will be allowed to pass through the deserializer to reach those
respective devices.
See Figure 25 for an example of this function and refer to application note: I2C over DS90UB913/4 FPD-Link III
with Bidirectional Control Channel (SNLA222).
If master controller transmits I2C transaction for address 0xA0, the DES A with I2C pass-through enabled will
transfer I2C commands to remote Camera A. The DES B with I2C pass-through disabled, any I2C commands
will NOT be passed on the I2C bus to Camera B.
DS90UB913AQ
CMOS
Image
Sensor
DIN[11:0]
,HS,VS
PCLK
SDA
SCL
Camera A
Slave ID: (0xA0)
CMOS
Image
Sensor
DS90UB914AQ
ROUT[11:0],
HS,VS,
PCLK
2
I C
SER A:
Remote I2C _MASTER Proxy
DES A: I2C_SLAVE
Local
I2C_PASS_THRU Enabled
DS90UB913AQ
DS90UB914AQ
DIN[11:0]
,HS,VS
PCLK
SDA
SCL
Camera B
Slave ID: (0xA0)
SDA
SCL
2
I C
ECU
Module
ROUT[11:0],
HS,VS,
PCLK
2
I C
SER B:
Remote I2C_MASTER Proxy
2
I C
SDA
SCL
DES B: I2C_SLAVE
Local
I2C_PASS_THRU Disabled
PC
Master
Copyright © 2016, Texas Instruments Incorporated
Figure 25. I2C Pass-Through
30
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Programming (continued)
8.5.4 Slave Clock Stretching
The I2C-compatible interface allows programming of the DS90UB913A-Q1, DS90UB914A-Q1, or an external
remote device (such as image sensor) through the bidirectional control. To communicate and synchronize with
remote devices on the I2C bus through the bidirectional control channel/MCU, the chipset utilizes bus clock
stretching (holding the SCL line low) during data transmission; where the I2C slave pulls the SCL line low
on the 9th clock of every I2C transfer (before the ACK signal). The slave device will not control the clock and
only stretches it until the remote peripheral has responded. The I2C master must support clock stretching to
operate with the DS90UB913A/914A chipset.
8.5.5 ID[x] Address Decoder on the Deserializer
The IDx[0] and IDx[1] pins on the Deserializer are used to decode and set the physical slave address of the
Deserializer (I2C only) to allow up to 16 devices on the bus using only two pins. The pins set one of 16 possible
addresses for each Deserializer device. As there will be more Deserializer devices connected on the same board
than Serializers, more I2C device addresses have been defined for the DS90UB914A-Q1 Deserializer than the
DSDS90UB913A-Q1 Serializer. The pins must be pulled to VDD (1.8 V, not VDDIO) with a 10-kΩ resistor and two
pulldown resistors (RID0 and RID1) of the recommended value to set the physical device address. The
recommended maximum resistor tolerance is 1%.
1.8 V
1.8 V
10 k
10 k
RID1
RID0
VDDIO
IDx[0]
RPU
IDx[1]
RPU
HOST
Deserializer
SCL
SCL
SDA
SDA
To other
Devices
Copyright © 2016, Texas Instruments Incorporated
Figure 26. ID[x[ Address Decoder on the Deserializer
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
31
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 RID1 (kΩ)
(1%Tolerance)
Resistor RID0 (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.
32
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Camera A
DS90UB913AQ
Slave ID: (0xA0)
CMOS
Image
Sensor
ROUT[11:0],
HS, VS,
PCLK
DIN[11:0]
, HS, VS,
PCLK
2
SDA
SCL
I C
PC/
SER A: ID[x](0xB0)
EEPROM
Slave ID: (0xA2)
Camera B
DS90UB913AQ
Slave ID: (0xA0)
CMOS
Image
Sensor
DS90UB914AQ
DES A: ID[x](0xC0)
SLAVE_ID0_ALIAS(0xA0)
SLAVE_ID0_ID(0xA0)
SLAVE_ID1_ALIAS(0xA2)
SLAVE_ID1_ID(0xA2)
PC/
EEPROM
Slave ID: (0xA2)
ECU
Module
DS90UB914AQ
DIN[11:0]
, HS, VS,
PCLK
SDA
SCL
SDA
SCL
2
I C
ROUT[11:0],
HS, VS,
PCLK
2
I C
SER B: ID[x](0xB2)
2
I C
SDA
SCL
DES B: ID[x](0xC2)
SLAVE_ID0_ALIAS(0xA4)
SLAVE_ID0_ID(0xA0)
SLAVE_ID1_ALIAS(0xA6)
SLAVE_ID1_ID(0xA2)
PC
Master
Copyright © 2016, Texas Instruments Incorporated
Figure 27. Multiple Device Addressing
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
33
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
8.6 Register Maps
Table 6. DS90UB914A-Q1 Control Registers (1)
ADDR
(HEX)
NAME
BITS
7:1
0x00
I2C Device ID
0
7:6
5
4:3
0x01
0x02
Reset
34
R/W
DEVICE ID
RW
Deserializer ID
Select
RW
DEFAULT
0xC0'h
(1100_0000'b)
DESCRIPTION
7-bit address of Deserializer; 0x60'h.
(110_0000'b) default
0: Deserializer Device ID is set from ID[x].
1: Register I2C Device ID overrides ID[x].
RSVD
Reserved.
ANAPWDN
This register can be set only through local I2C
access.
1: Analog power down: Powers down the
analog block in the Serializer.
0: No effect.
RW
0
RSVD
Reserved.
2
BC Enable
RW
1
Back Channel Enable
0: Disable
1: Enable
1
Digital Reset 1
RW
0
Digital Reset Resets the entire digital block
except registers. This bit is self-clearing.
1: Reset.
0: No effect.
0
Digital Reset 0
RW
0
Digital Reset Resets the entire digital block
including registers. This bit is self-clearing.
1: Reset.
0: No effect.
7
RSVD
Reserved.
6
RSVD
Reserved.
5
Auto-Clock
RW
0
1: Output PCLK or OSC clock when not
LOCKED.
0: Only PCLK.
4
SSCG LFMODE
RW
0
1: Selects 8x mode for 10-18 MHz frequency
range in SSCG.
0: SSCG running at 4X mode.
0
SSCG Select.
0000: Normal Operation, SSCG OFF.
0001: fmod (Hz) PCLK/2168, fdev ±0.50%.
0010: fmod (Hz) PCLK/2168, fdev ±1.00%.
0011: fmod (Hz) PCLK/2168, fdev ±1.50%.
0100: fmod (Hz) PCLK/2168, fdev ±2.00%.
0101: fmod (Hz) PCLK/1300, fdev ±0.50%.
0110: fmod (Hz) PCLK/1300, fdev ±1.00%.
0111: fmod (Hz) PCLK/1300, fdev ±1.50%.
1000: fmod (Hz) PCLK/1300, fdev ±2.00%.
1001: fmod (Hz) PCLK/868, fdev ±0.50%.
1010: fmod (Hz) PCLK/868, fdev ±1.00%.
1011: fmod (Hz) PCLK/868, fdev ±1.50%.
1100: fmod (Hz) PCLK/868, fdev ±2.00%.
1101: fmod (Hz) PCLK/650, fdev ±0.50%.
1110: fmod (Hz) PCLK/650, fdev ±1.00%.
1111: fmod (Hz) PCLK/650, fdev ±1.50%.
Note: This register should be changed only
after disabling SSCG.
General
Configuration 0
3:0
(1)
FIELD
SSCG
RW
To ensure optimum device functionality, It is recommended to NOT write to any RESERVED registers.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
0x03
NAME
BITS
FIELD
R/W
DEFAULT
7
RX Parity Checker
Enable
RW
1
Forward Channel Parity Checker Enable.
1: Enable.
0: Disable.
6
TX CRC Checker
Enable
RW
1
Back Channel CRC Generator Enable.
1: Enable.
0: Disable.
5
VDDIO Control
RW
1
Auto voltage control.
1: Enable (auto detect mode).
0: Disable.
4
VDDIO Mode
RW
0
VDDIO voltage set.
1: 3.3 V
0: 1.8 V
3
I2C Pass-Through
RW
1
I2C Pass-Through Mode.
1: Pass-Through Enabled. SER Alias 0x07 and
Slave Alias 0x09- 0x17.
0: Pass-Through Disabled.
General
Configuration 1
2
AUTO ACK
RW
0
Automatically Acknowledge I2C Remote Write
When enabled, I2C writes to the Deserializer
(or any remote I2C Slave, if I2C PASS ALL is
enabled) are immediately acknowledged
without waiting for the Deserializer to
acknowledge the write. The accesses are then
remapped to address specified in 0x06. This
allows I2C bus without LOCK.
1: Enable.
0: Disable.
1
Parity Error Reset
RW
0
Parity Error Reset, This bit is NOT self-clearing.
1: Parity Error Reset.
0: No effect.
1
Pixel Clock Edge Select.
1: Parallel Interface Data is strobed on the
Rising Clock Edge.
0: Parallel Interface Data is strobed on the
Falling Clock Edge.
0
0x04
EQ Feature
Control
RRFB
RW
7:4
EQ level - when
AEQ bypass is
enabled EQ setting
is provided by this
register
3:0
RSVD
RW
0000
Equalization gain values listed below are @
maximum line rate (1.4 Gbps).
0000 = ~16.5 dB (minimum)
0001 = ~19.0 dB
0011 = ~20.5 dB
0111 = ~22.0 dB
1111 = ~23.0 dB (maximum)
Reserved.
0x05
Reserved.
RW
7:1
0x06
DESCRIPTION
0x00'h
Remote ID
7-bit Serializer Device ID Configures the I2C
Slave ID of the remote Serializer. A value of 0
in this field disables I2C access to the remote
Serializer. This field is automatically configured
by the Bidirectional Control Channel once RX
Lock has been detected. Software may
overwrite this value, but should also assert the
FREEZE DEVICE ID bit to prevent overwriting
by the Bidirectional Control Channel.
Freeze Device ID
1: Freeze Serializer Device ID Prevent autoloading of the Serializer Device ID from the
Forward Channel. The ID will be frozen at the
value written.
0: Update.
SER ID
0
RW
0
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
35
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
NAME
BITS
FIELD
R/W
DEFAULT
7:1
0x07
Serializer Alias ID
SER Alias
0
0x08
Slave ID[0]
7:1
0
0x09
Slave ID[1]
7:1
0
0x0A
Slave ID[2]
7:1
0
0x0B
Slave ID[3]
7:1
0
0x0C
Slave ID[4]
7:1
0
36
RW
0x00'h
DESCRIPTION
7-bit Remote Serializer Device Alias ID
Configures the decoder for detecting
transactions designated for an I2C Serializer
device. The transaction will be remapped to the
address specified in the SER ID register. A
value of 0 in this field disables access to the
remote I2C Serializer.
RSVD
Reserved.
Slave ID0
7-bit Remote Slave Device ID 0 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID0, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Slave ID1
7-bit Remote Slave Device ID 1 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID1, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Slave ID2
7-bit Remote Slave Device ID 2 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID2, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Slave ID3
7-bit Remote Slave Device ID 3 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID3, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Slave ID4
7-bit Remote Slave Device ID 4 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID4, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
0x0D
NAME
Slave ID[5]
BITS
7:1
0
0x0E
Slave ID[6]
7:1
0
0x0F
Slave ID[7]
7:1
0
0x10
Slave Alias[0]
7:1
0
0x11
Slave Alias[1]
7:1
0
0x12
Slave Alias[2]
7:1
0
FIELD
R/W
Slave ID5
RW
DEFAULT
0x00'h
DESCRIPTION
7-bit Remote Slave Device ID 5 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID5 , the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RSVD
Reserved.
Slave ID6
7-bit Remote Slave Device ID 6 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID6, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Slave ID7
7-bit Remote Slave Device ID 7 Configures the
physical I2C address of the remote I2C Slave
device attached to the remote Serializer. If an
I2C transaction is addressed to the Slave Alias
ID7, the transaction will be remapped to this
address before passing the transaction across
the Bidirectional Control Channel to the
Serializer.
RW
0x00'h
RSVD
Reserved.
Slave Alias ID0
7-bit Remote Slave Device Alias ID 0
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID0 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
Slave Alias ID1
7-bit Remote Slave Device Alias ID 1
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID1 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
Slave Alias ID2
7-bit Remote Slave Device Alias ID 2
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID2 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
37
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
0x13
NAME
Slave Alias[3]
BITS
7:1
0
0x14
Slave Alias[4]
7:1
0
0x15
Slave Alias[5]
7:1
0
0x16
Slave Alias[6]
7:1
0
0x17
Slave Alias[7]
7:1
0
FIELD
R/W
Slave Alias ID3
0x00'h
DESCRIPTION
7-bit Remote Slave Device Alias ID 3
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID3 register. A value of 0
in this field disables access to the remote I2C
Slave.
RSVD
Reserved.
Slave Alias ID4
7-bit Remote Slave Device Alias ID 4
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID4 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
Slave Alias ID5
7-bit Remote Slave Device Alias ID 5
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID5 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
Slave Alias ID6
7-bit Remote Slave Device Alias ID 6
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID6 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
Slave Alias ID7
7-bit Remote Slave Device Alias ID 7
Configures the decoder for detecting
transactions designated for an I2C Slave
device attached to the remote Serializer. The
transaction will be remapped to the address
specified in the Slave ID7 register. A value of 0
in this field disables access to the remote I2C
Slave.
RW
0x00'h
RSVD
Reserved.
7:0
Parity Error
Threshold Byte 0
0x00'h
Parity errors threshold on the Forward channel
during normal information. This sets the
maximum number of parity errors that can be
counted using register 0x1A.
Least significant Byte.
RW
0x01'h
Parity errors threshold on the Forward channel
during normal operation. This sets the
maximum number of parity errors that can be
counted using register 0x1B.
Most significant Byte.
RW
0x00'h
Number of parity errors in the Forward channel
during normal operation.
Least significant Byte.
0x18
Parity Errors
Threshold
0x19
Parity Errors
Threshold
7:0
Parity Error
Threshold Byte 1
0x1A
Parity Errors
7:0
Parity Error Byte 0
38
RW
DEFAULT
RW
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
NAME
BITS
0x1B
Parity Errors
0x1C
FIELD
R/W
DEFAULT
7:0
Parity Error Byte 1
RW
0x00'h
Number of parity errors in the Forward channel
during normal operation.
Most significant Byte.
7:4
Rev-ID
R
0x0'h
Revision ID.
0x0: Production Revision ID.
3
RSVD
2
Parity Error
R
1
Signal Detect
R
Reserved.
0
General Status
0
0x1E
Parity Error detected.
1: Parity Errors detected.
0: No Parity Errors.
1: Serial input detected.
0: Serial input not detected.
R
0
De-Serializer CDR, PLL's clock to recovered
clock frequency.
1: De-Serializer locked to recovered clock.
0: De-Serializer not locked.
RW
0
Local GPIO Output Value This value is the
output on the GPIO pin when the GPIO function
is enabled, the local GPIO direction is Output.
0
Lock
7
GPIO1 Output
Value
6
RSVD
5
GPIO1 Direction
RW
4
GPIO1 Enable
RW
1
GPIO Function Enable.
1: Enable GPIO operation.
0: Enable normal operation.
3
GPIO0 Output
Value
RW
0
Local GPIO Output Value This value is output
on the GPIO pin when the GPIO function is
enabled, the local GPIO direction is Output.
2
RSVD
1
GPIO0 Direction
RW
1
Local GPIO Direction.
1: Input.
0: Output.
0
GPIO0 Enable
RW
1
GPIO Function Enable.
1: Enable GPIO operation.
0: Enable normal operation.
7
GPIO3 Output
Value
RW
0
Local GPIO Output Value This value is the
output on the GPIO pin when the GPIO function
is enabled, the local GPIO direction is Output.
6
RSVD
5
GPIO3 Direction
RW
1
Local GPIO Direction.
1: Input.
0: Output.
4
GPIO3 Enable
RW
1
GPIO Function Enable.
1: Enable GPIO operation.
0: Enable normal operation.
3
GPIO2 Output
Value
RW
0
Local GPIO Output Value This value is output
on the GPIO pin when the GPIO function is
enabled, the local GPIO direction is Output.
2
RSVD
1
GPIO2 Direction
RW
1
Local GPIO Direction.
1: Input.
0: Output.
0
GPIO2 Enable
RW
1
GPIO Function Enable.
1: Enable GPIO operation.
0: Enable normal operation.
Reserved.
1
0x1D
DESCRIPTION
GPIO[1] and
GPIO[0] Config
GPIO[3] and
GPIO[2] Config
Local GPIO Direction.
1: Input.
0: Output.
Reserved.
Reserved.
Reserved.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
39
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
0x1F
0x20
NAME
Mode and OSS
Select
BITS
40
R/W
DEFAULT
DESCRIPTION
7
OEN_OSS
Override
RW
0
Allows overriding OEN and OSS select coming
from Pins.
1: Overrides OEN/OSS_SEL selected by pins.
0: Does NOT override OEN/OSS_SEL select
by pins.
6
OEN Select
RW
0
OEN configuration from register.
5
OSS Select
RW
0
OSS_SEL configuration from register.
4
MODE_OVERRID
E
RW
0
Allows overriding mode select bits coming from
forward-channel.
1: Overrides MODE select bits.
0: Does not override MODE select bits.
3
PIN_MODE_12–bit
HF mode
R
0
2
PIN_MODE_10-bit
mode
R
0
1
MODE_12–bit High
Frequency
0
MODE_10–bit
mode
7:1
BCC Watchdog
timer
0
BCC Watchdog
Timer Disable
RW
RW
RW
RW
Status of mode select pin.
Status of mode select pin.
0
Selects 12-bit high frequency mode. This bit is
automatically updated by the mode settings
from MODE pin unless MODE_OVERRIDE is
SET.
1: 12-bit high frequency mode is selected.
0: 12-bit high frequency mode is not selected.
To select 12-bit low frequency mode by register
override, set 0x1F[1] = 0x1F[0] = 0
0
Selects 10-bit mode. This bit is automatically
updated by the mode settings from MODE pin
unless MODE_OVERRIDE is SET.
1: Enables 10-bit mode.
0: Disables 10-bit mode.
0x7F'h
(111_1111'b)
BCC Watchdog
Control
The watchdog timer allows termination of a
control channel transaction if it fails to complete
within a programmed amount of time. This field
sets the Bidirectional Control Channel
Watchdog Timeout value in units of 2ms. This
field should not be set to 0.
0
Disable Bidirectional Control Channel
Watchdog Timer.
1: Disables BCC Watchdog Timer operation.
0: Enables BCC Watchdog Timer operation.
1: Enable Forward Control Channel passthrough of all I2C accesses to I2C IDs that do
not match the Deserializer I2C ID. The I2C
accesses are then remapped to address
specified in register 0x06 (SER ID).
0: Enable Forward Control Channel passthrough only of I2C accesses to I2C IDs
matching either the remote Serializer ID or the
remote I2C IDs.
I2C Pass-Through
All
RW
0
6:4
I2C SDA Hold
Time
RW
0x1'h
Internal SDA Hold Time This field configures
the amount of internal hold time provided for
the SDA input relative to the SCL input. Units
are 50ns.
3:0
I2C Filter Depth
RW
0x7'h
I2C Glitch Filter Depth This field configures the
maximum width of glitch pulses on the SCL and
SDA inputs that will be rejected. Units are 10ns.
7
0x21
FIELD
I2C Control 1
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
NAME
BITS
R
0
6
Clear Sequence
Error
RW
0
1: Clears the Sequence Error Detect bit.
0: No effect.
5
RSVD
Reserved.
SDA Output Delay
00
SDA Output Delay This field configures output
delay on the SDA output. Setting this value will
increase output delay in units of 50ns. Nominal
output delay values for SCL to SDA are:
00 : ~350 ns
01: ~400 ns
10: ~450 ns
11: ~500 ns
0
Disable Remote Writes to local registers
Setting this bit to a 1 will prevent remote writes
to local device registers from across the control
channel. This prevents writes to the
Deserializer registers from an I2C master
attached to the Serializer. Setting this bit does
not affect remote access to I2C slaves at the
Deserializer.
0
Speed up I2C Bus Watchdog Timer.
1: Watchdog Timer expires after approximately
50 µs.
0: Watchdog Timer expires after approximately
1 s.
Disable I2C Bus Watchdog Timer When the
I2C Watchdog Timer may be used to detect
when the I2C bus is free or hung up following
an invalid termination of a transaction. If SDA is
high and no signaling occurs for approximately
1 second, the I2C bus will assumed to be free.
If SDA is low and no signaling occurs, the
device will attempt to clear the bus by driving 9
clocks on SCL.
Local Write Disable
I2C Bus Timer
Speedup
RW
RW
I2C Bus Timer
Disable
RW
0
7:0
GPCR
RW
0x00'h
7:4
RSVD
0
3
0
Parity Error Count
7:0
Scratch Register.
Reserved.
BIST Pin
Configuration
RW
1
Bist Configured through Pin.
1: Bist configured through pin.
0: Bist configured through register bit
"reg_24[0]".
BIST Clock Source
RW
00
BIST Clock Source.
See Table 4
BIST Enable
RW
0
BIST Control.
1: Enabled.
0: Disabled.
R
0x00'h
BIST Control
2:1
0x25
RW
I2C Control 2
General Purpose
Control
DESCRIPTION
Forward Channel
Sequence Error
1
0x24
DEFAULT
7
2
0x23
R/W
Control Channel Sequence Error Detected This
bit indicates a sequence error has been
detected in forward control channel.
1: If this bit is set, an error may have occurred
in the control channel operation.
0: No forward channel errors have been
detected on the control channel.
4:3
0x22
FIELD
BIST Error Count
Number of Forward Channel Parity errors in
BIST mode.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
41
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
0x26
NAME
Bidirectional
Control Channel
(BCC) Tuning for
Channel 0 (RIN0±)
BITS
FIELD
R/W
7:6
RSVD
Reserved.
5:4
RSVD
Reserved.
3:2
Termination
Resistance Control
1:0
RSVD
RW
Oscillator output
divider select
1:0
RSVD
Reserved.
OSC OUT
DIVIDER SEL
Selects the divider for the OSC clock out on
PCLK when system is not locked and selected
by OEN/OSS_SEL 0x02[5]:
00: 50 M (±30%)
01: 25 M (±30%)
1X: 12.5 M (±30%)
RW
0x3D 0x3E
CML Output
Enable
4
3:0
0x41
0x42
SCL High Time
SCL Low Time
7:0
RSVD
Reserved.
CML OUT Enable
RW
1
CML Output Driver Enable is Active-Low.
0: CML Loop-through Driver is powered up.
1: CML Loop-through Driver is powered down.
RSVD
Reserved.
SCL High Time
0x82'h
(1000_0010'b)
I2C Master SCL High Time This field configures
the high pulse width of the SCL output when
the De-Serializer is the Master on the local I2C
bus. Units are 50 ns for the nominal oscillator
clock frequency. The default value is set to
provide a minimum (4 μs + 0.3 μs of rise time
for cases where rise time is very fast) SCL high
time with the internal oscillator clock running at
26 MHz rather than the nominal 20 MHz.
0x82'h
(1000_0010'b)
I2C SCL Low Time This field configures the low
pulse width of the SCL output when the DeSerializer is the Master on the local I2C bus.
This value is also used as the SDA setup time
by the I2C Slave for providing data prior to
releasing SCL during accesses over the
Bidirectional Control Channel. Units are 50 ns
for the nominal oscillator clock frequency. The
default value is set to provide a minimum (4.7
µs + 0.3 µs of fall time for cases where fall time
is very fast) SCL low time with the internal
oscillator clock running at 26 MHz rather than
the nominal 20 MHz.
7:0
SCL Low Time
7:2
RSVD
RW
RW
Reserved.
1
Force Back
Channel Error
RW
0
1: This bit introduces multiple errors into Back
channel frame.
0: No effect.
0
Force One Back
Channel Error
RW
0
1: This bit introduces ONLY one error into Back
channel frame. Self clearing bit.
0: No effect.
CRC Force Error
0x43 0x45
42
00
Reserved.
7:5
0x40
00: 50 Ω (default)
01: 47.4 Ω
10: 45.3 Ω
11: 37.7 Ω
Reserved.
7:2
0x3F
00
DESCRIPTION
Reserved.
0x27 0x3B
0x3C
DEFAULT
Reserved.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Register Maps (continued)
Table 6. DS90UB914A-Q1 Control Registers(1) (continued)
ADDR
(HEX)
0x46
NAME
Bidirectional
Control Channel
(BCC) Tuning for
Channel 1 (RIN1±)
BITS
FIELD
R/W
7:6
RSVD
Reserved.
5:4
RSVD
Reserved.
3:2
Termination
Resistance Control
1:0
RSVD
RW
0x4D
00: 50 Ω (default)
01: 47.4 Ω
10: 45.3 Ω
11: 37.7 Ω
Reserved.
SEL Register
AEQ Test Mode
Select
7
Pin Channel SEL
Override
RW
0
0: SEL pin selects the FPD-III serial input
1: 0x4C[6] selects the FPD-III serial input
6
Channel SEL
RW
0
0: Channel 0 is selected
1: Channel 1 is selected
5:0
RSVD
Reserved.
7
RSVD
Reserved.
6
AEQ Bypass
5:0
0x4E
00
DESCRIPTION
Reserved.
0x47 0x4B
0x4C
DEFAULT
EQ Value
RW
0
Bypass AEQ and use set manual EQ value
using register 0x04.
RSVD
Reserved.
7:4
AEQ / Manual Eq
Readback
Read back the adaptive and manual EQ level.
EQ gain values listed below are @ maximum
line rate (1.4 Gbps).
0000 = ~16.5 dB (minimum)
0001 = ~19.0 dB
0011 = ~20.5 dB
0111 = ~22.0 dB
1111 = ~23.0 dB (maximum)
3:0
RSVD
R
0000
Reserved.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
43
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The DS90UB914A was designed as a deserializer to support automotive camera designs. Automotive cameras
are often located in remote positions such as bumpers or trunk lids, and a major component of the system cost is
the wiring. For this reason it is desirable to minimize the wiring to the camera. This chipset allows the video data,
along with a bidirectional control channel, and power to all be sent over a single coaxial cable. The chipset is
also able to transmit over STP and is pin-to-pin/backwards compatible with the DS90UB914Q.
9.1.1 Power Over Coax
See application report Sending Power over Coax in DS90UB913A Designs for more details.
9.1.2 Power-Up Requirements and PDB Pin
The PDB pin on the device must be ramped after the VDDIO and VDD_n supplies have reached their required
operating voltage levels. It is recommended to assert PDB = HIGH with a control signal from a microcontroller to
help ensure proper sequencing of the PDB pin after settling of the power supplies. If a microcontroller is not
available, an RC filter network can be used on the PDB pin as an alternative method for asserting the PDB
signal. Please refer to Power Down for device operation when powered down.
Common applications will tie the VDDIO and VDD_n supplies to the same power source of 1.8V typically. This is an
acceptable method for ramping the VDDIO and VDD_n supplies. The main constraint here is that the VDD_n supply
does not lead in ramping before the VDDIO system supply. This is noted in Figure 28 with the requirement of t1≥ 0.
t0
1.8 V or 3.3 V
VDDIO
GND
t2
1.8V
VDD_n
GND
t1
VDDIO
PDB(1)
GND
(1)
It is recommended to assert PDB = HIGH with a microcontroller rather than an RC filter
network to help ensure proper sequencing of PDB pin after settling of power supplies.
Figure 28. Suggested Power-Up Sequencing
44
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
Application Information (continued)
Table 7. Power-Up Sequencing Constraints for DS90UB914A-Q1
Symbol
Description
Test Conditions
Min
t0
VDDIO Rise Time
VIL to VIH on rising edge; Monotonic
signal ramp is required
0.05
t1
VDDIO to VDD_n Delay
VIL of rising edge (VDDIO) to VIL of rising
edge (VDD_n)
0
t2
VDD_n Rise Time
VPDB < VIL_VDDIO; VIL to VIH on rising
edge; Monotonic signal ramp is required
0.05
Typ
Max
Units
1.5
ms
ms
1.5
ms
Once the link is established, the 914 must be reset to optimize the link performance using either of the following
methods:
1. Toggle the PDB power down reset pin, or:
2. Write the reset register 0x01[1] = 1 over I2C. This is a self-clearing register bit. It does not erase or reset
other registers in the 914A.
If the MODE on the 914A device is being set through register override (0x1F) instead of strap resistor on the
MODE pin, a register reset (0x[1]1 = 1) is required. Manually toggling the PDB pin will not perform the required
optimization.
ROUT[11:0]
RIN0
or
RIN1
PDB
(914A)
t1
t0
Figure 29. Suggested Timing of PDB RESET for DS90UB914A-Q1 Deserializer
Table 8. PDB RESET Timing Constraints for DS90UB914A-Q1
Symbol
Description
Test Conditions
t0
PDB minimum LOW pulse
width
VIL of falling edge to VIL of rising edge
t1
Data Lock Time
VIH of rising edge
Min
Typ
2
5
15
Max
ms
22
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
Units
ms
45
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
9.1.3 AC Coupling
The SER/DES supports only AC-coupled interconnects through an integrated DC-balanced decoding scheme.
External AC-coupling capacitors must be placed in series in the FPD-Link III signal path as illustrated in
Figure 30. For applications utilizing single-ended 50-Ω coaxial cable, the unused data pin (DOUT–, RIN–) should
utilize a 0.047-µF capacitor and should be terminated with a 50-Ω resistor.
DOUT+
RIN+
DOUT-
RIN-
SER
DES
Copyright © 2016, Texas Instruments Incorporated
Figure 30. AC-Coupled Connection (STP)
DOUT+
RIN+
DOUT-
RIN-
SER
DES
50Q
50Q
Copyright © 2016, Texas Instruments Incorporated
Figure 31. AC-Coupled Connection (Coaxial)
For high-speed FPD–Link III transmissions, the smallest available package should be used for the AC coupling
capacitor. This will help minimize degradation of signal quality due to package parasitics. The I/O’s require a 0.1µF AC coupling capacitors to the line.
9.1.4 Transmission Media
The DS90UB913A/914A chipset is intended to be used in a point-to-point configuration through a shielded
coaxial cable. The Serializer and Deserializer provide internal termination to minimize impedance discontinuities.
The interconnect (cable and connectors) should have a differential impedance of 100 Ω, or a single-ended
impedance of 50 Ω. The maximum length of cable that can be used is dependent on the quality of the cable
(gauge, impedance), connector, board(discontinuities, power plane), the electrical environment (for example,
power stability, ground noise, input clock jitter, PCLK frequency, etc). The resulting signal quality at the receiving
end of the transmission media may be assessed by monitoring the differential eye opening of the serial data
stream. A differential probe should be used to measure across the termination resistor at the CMLOUTP/N pins.
Figure 8 illustrates the minimum eye width and eye height that is necessary for bit error free operation.
Please refer to Cable Requirements for the DS90UB913A & DS90UB914A or contact TI for a channel
specification regarding cable loss parameters and further details on adaptive equalizer loss compensation.
9.1.5 Adaptive Equalizer – Loss Compensation
The receiver inputs provide an adaptive equalization filter in order to compensate for signal degradation from the
interconnect components. In order to determine the maximum cable reach, factors that affect signal integrity such
as jitter, skew, ISI, crosstalk, etc. need to be taken into consideration. The level of equalization can also be
manually selected via register controls. The adaptive equalized output can be seen using the
CMLOUTP/CMLOUTN pins in the Deserializer.
If the deserializer loses LOCK, the adaptive equalizer will reset and perform the LOCK algorithm again to
reacquire the video data stream being sent by the serializer.
46
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
9.2 Typical Applications
9.2.1 Coax Application
DS90UB913AQ
Serializer
DS90UB914AQ
Deserializer
FPD-Link III
Camera Data
DOUT+
10 or 12
Image
Sensor
DIN[11:0] or
DIN[9:0]
HSYNC,
VSYNC
DATA
HSYNC
DOUT-
VSYNC
Pixel Clock
4
Camera Data
10 or 12
RIN+
50Q
50Q
RIN-
ROUT[11:0]
or
ROUT[9:0]
HSYNC,
VSYNC
PCLK
PCLK
Bi-Directional
Control Channel
GPO[3:0]
SDA
SDA
SCL
ECU Module
4
GPIO[3:0]
SDA
SCL
VSYNC
Pixel Clock
GPIO[3:0]
GPO[3:0]
Camera Unit
DATA
HSYNC
SCL
Microcontroller
SDA
SCL
Copyright © 2016, Texas Instruments Incorporated
Figure 32. Coax Application Block Diagram
9.2.1.1 Design Requirements
For the typical coax design applications, use the following as input parameters:
Table 9. Coax Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
VDDIO
1.8 V or 3.3 V
VDD_n
1.8 V
AC Coupling Capacitors for RIN±
0.1 µF, 0.047 µF (For the unused data pin, RIN– )
PCLK Frequency
50 MHz (12-bit low frequency), 75 MHz (12-bit high frequency), 100
MHz (10-bit)
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
47
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
9.2.1.2 Detailed Design Procedure
Figure 33 shows a typical connection using a Coax interface to the DS90UB914A-Q1 Deserializer.
DS90UB914A-Q1
1.8 V
VDDD
C3
C11
C4
C12
C5
C13
VDDIO
VDDIO1
C8
VDDR
C16
C18
VDDIO2
C9
VDDSSCG
VDDIO3
C10
1.8 V
VDDPLL
FB1
C6
C14
C17
FB2
C7
C15
C19
1.8 V
VDDCML
RTERM
C1
RIN1+
C2
Serial
FPD-Link II
Interface
RIN1-
C22
RIN0+
C23
1.8 V
RIN0-
RTERM
GPIO[0]
GPIO[1]
GPIO[2]
GPIO[3]
MODE
10 kQ
RMODE
ROUT0
ROUT1
ROUT2
ROUT3
ROUT4
ROUT5
ROUT6
LVCMOS
Parallel
Outputs
ROUT7
ROUT8
ROUT9
ROUT10
ROUT11
HS
VS
PCLK
LOCK
PASS
1.8 V
10 kQ
IDx[0]
RID0
PDB
SEL
OEN
OSS_SEL
BISTEN
1.8 V
VDDIO
10 kQ
IDx[1]
RPU
I2C
Bus
Interface
RPU
RID1
SCL
FB3
SDA
FB4
C20
C21
Optional
Optional
RES_PIN43
DAP (GND)
NOTE:
C1, C22 = 0.1 µF (50 WV)
C2, C23 = 0.047 µF (50 WV)
C3 - C10 = 0.01 µF
C11 - C16 = 0.1 µF
C17 - C18 = 4.7 µF
C19 = 22 µF
C20 - C21 = >100 pF
RTERM = 50 Q
RPU = 1 kQ to 4.7 kQ
RID (see ID[x] Resistor Value Table)
FB1 - FB4: Impedance = 1 kQ (@ 100 MHz)
low DC resistance (<1 Q)
The "Optional" components shown are
provisions to provide higher system noise
immunity and will therefore result in higher
performance.
Copyright © 2016, Texas Instruments Incorporated
Figure 33. DS90UB914A-Q1 Typical Connection Diagram — Pin Control (Coax)
48
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
100 MHz TX Pixel Clock
(1 V/DIV)
CML Data Throughput
(100 mV/DIV)
Magnitude (50 mV/DIV)
9.2.1.3 Application Curves
Time (200 ps/DIV)
Time (2.5 ns/DIV)
Figure 34. Coax Eye Diagram at 1.4-Gbps Line Rate (100MHz Pixel Clock) from Deserializer CML Loop-through
Output (CMLOUT±)
Figure 35. Coax Eye Diagram with 100-MHz TX Pixel Clock
Overlay from Deserializer CML Loop-through Output
(CMLOUT±)
9.2.2 STP Application
DS90UB913AQ
Serializer
DS90UB914AQ
Deserializer
FPD-Link III
Camera Data
DOUT+
10 or 12
Image
Sensor
DIN[11:0] or
DIN[9:0]
HSYNC,
VSYNC
DATA
HSYNC
DOUT-
VSYNC
Pixel Clock
4
Camera Data
10 or 12
RIN+
RIN-
ROUT[11:0]
or
ROUT[9:0]
HSYNC,
VSYNC
Bi-Directional
Control Channel
PCLK
PCLK
GPO[3:0]
Camera Unit
SCL
VSYNC
Pixel Clock
GPIO[3:0]
SDA
SDA
SCL
SCL
ECU Module
4
GPIO[3:0]
GPO[3:0]
SDA
DATA
HSYNC
Microcontroller
SDA
SCL
Copyright © 2016, Texas Instruments Incorporated
Figure 36. STP Application Block Diagram
9.2.2.1 Design Requirements
For the typical STP design applications, use the following as input parameters
Table 10. STP Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
VDDIO
1.8 V or 3.3 V
VDD_n
1.8 V
AC Coupling Capacitors for RIN±
0.1 µF
PCLK Frequency
50 MHz (12-bit low frequency), 75 MHz (12-bit high frequency),
100 MHz (10-bit)
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
49
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
9.2.2.2 Detailed Design Procedure
Figure 37 shows a typical connection using an STP interface to the DS90UB914A-Q1 Deserializer.
DS90UB914AQ-Q1
1.8 V
VDDD
C3
C11
C4
C12
C5
C13
VDDIO
VDDIO1
C8
VDDR
C16
C18
VDDIO2
C9
VDDSSCG
VDDIO3
C10
1.8 V
VDDPLL
FB1
C6
C14
C17
FB2
C7
C15
C19
1.8 V
VDDCML
C1
RIN1+
C2
Serial
FPD-Link II
Interface
RIN1-
C22
RIN0+
C23
RIN0-
1.8 V
GPIO[0]
GPIO[1]
GPIO[2]
GPIO[3]
MODE
10 kQ
RMODE
ROUT0
ROUT1
ROUT2
ROUT3
ROUT4
ROUT5
ROUT6
LVCMOS
Parallel
Outputs
ROUT7
ROUT8
ROUT9
ROUT10
ROUT11
HS
VS
PCLK
LOCK
PASS
1.8 V
10 kQ
IDx[0]
RID0
PDB
SEL
OEN
OSS_SEL
BISTEN
1.8 V
VDDIO
10 kQ
IDx[1]
RPU
I2C
Bus
Interface
RPU
RID1
SCL
FB3
SDA
FB4
C20
C21
Optional
Optional
RES_PIN43
DAP (GND)
NOTE:
C1, C2, C22, C23 = 0.1 µF (50 WV)
C3 - C10 = 0.01 µF
C11 - C16 = 0.1 µF
C17 - C18 = 4.7 µF
C19 = 22 µF
C20 - C21 = >100 pF
RPU = 1 kQ to 4.7 kQ
RID (see ID[x] Resistor Value Table)
FB1 - FB4: Impedance = 1 kQ (@ 100 MHz)
low DC resistance (<1 Q)
The "Optional" components shown are
provisions to provide higher system noise
immunity and will therefore result in higher
performance.
Copyright © 2016, Texas Instruments Incorporated
Figure 37. DS90UB914A-Q1 Typical Connection Diagram — Pin Control (STP)
50
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
100 MHz TX Pixel Clock
(1 V/DIV)
CML Data Throughput
(100 mV/DIV)
Magnitude (100 mV/DIV)
9.2.2.3 Application Curves
Time (200 ps/DIV)
Time (2.5 ns/DIV)
Figure 38. STP Eye Diagram at 1.4-Gbps Line Rate (100MHz Pixel Clock) from Deserializer CML Loop-through
Output (CMLOUT±)
Figure 39. STP Eye Diagram with 100-MHz TX Pixel Clock
Overlay from Deserializer CML Loop-through Output
(CMLOUT±)
10 Power Supply Recommendations
This device is designed to operate from an input core voltage supply of 1.8 V. Some devices provide separate
power and ground terminals for different portions of the circuit. This is done to isolate switching noise effects
between different sections of the circuit. Separate planes on the PCB are typically not required. Terminal
description tables typically provide guidance on which circuit blocks are connected to which power terminal pairs.
In some cases, an external filter may be used to provide clean power to sensitive circuits such as PLLs. The
voltage applied on VDDIO (1.8V, 3.3V) or other power supplies making up VDD_n (1.8V) should be at the input pin any board level DC drop should be compensated (i.e. ferrite beads in the path of the power supply rails).
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
51
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
11 Layout
11.1 Layout Guidelines
Circuit board layout and stack-up for the Ser/Des devices should be designed to provide low-noise power feed to
the device. Good layout practice will also separate high frequency or high-level inputs and outputs to minimize
unwanted stray noise pickup, feedback and interference. Power system performance may be greatly improved by
using thin dielectrics (2 to 4 mils) for power / ground sandwiches. This arrangement provides plane capacitance
for the PCB power system with low-inductance parasitics, which has proven especially effective at high
frequencies, and makes the value and placement of external bypass capacitors less critical. External bypass
capacitors should include both RF ceramic and tantalum electrolytic types. RF capacitors may use values in the
range of 0.01 µF to 0.1 µF. Tantalum capacitors may be in the 2.2-µF to 10-µF range. Voltage rating of the
tantalum capacitors should be at least 5X the power supply voltage being used.
Surface mount capacitors are recommended due to their smaller parasitics. When using multiple capacitors per
supply pin, locate the smaller value closer to the pin. A large bulk capacitor is recommend at the point of power
entry. This is typically in the 50-µF to 100-µF range and will smooth low frequency switching noise. It is
recommended to connect power and ground pins directly to the power and ground planes with bypass capacitors
connected to the plane with via on both ends of the capacitor. Connecting power or ground pins to an external
bypass capacitor will increase the inductance of the path.
A small body size X7R chip capacitor, such as 0603, is recommended for external bypass. Its small body size
reduces the parasitic inductance of the capacitor. The user must pay attention to the resonance frequency of
these external bypass capacitors, usually in the range of 20 to 30 MHz. To provide effective bypassing, multiple
capacitors are often used to achieve low impedance between the supply rails over the frequency of interest. At
high frequency, it is also a common practice to use two vias from power and ground pins to the planes, reducing
the impedance at high frequency.
Some devices provide separate power for different portions of the circuit. This is done to isolate switching noise
effects between different sections of the circuit. Separate planes on the PCB are typically not required. Pin
Description tables typically provide guidance on which circuit blocks are connected to which power pin pairs. In
some cases, an external filter many be used to provide clean power to sensitive circuits such as PLLs.
Use at least a four layer board with a power and ground plane. Locate LVCMOS signals away from the
differential lines to prevent coupling from the LVCMOS lines to the differential lines. Closely-coupled differential
lines of 100 Ω are typically recommended for differential interconnect. The closely coupled lines help to ensure
that coupled noise will appear as common-mode and thus is rejected by the receivers. The tightly coupled lines
will also radiate less.
Information on the WQFN style package is provided in TI Application Note: AN-1187/SNOA401.
11.1.1
Interconnect Guidelines
See SNLA008 for full details.
• Use 100 Ω coupled differential pairs
• Use the S/2S/3S rule in spacings
– – S = space between the pair
– – 2S = space between pairs
– – 3S = space to LVCMOS signal
• Minimize the number of Vias
• Use differential connectors when operating above 500 Mbps line speed
• Maintain balance of the traces
• Minimize skew within the pair
Additional general guidance can be found in the LVDS Owner’s Manual - available in PDF format from the Texas
Instrument web site at: www.ti.com/lvds.
52
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
11.2 Layout Example
Stencil parameters such as aperture area ratio and the fabrication process have a significant impact on paste
deposition. Inspection of the stencil prior to placement of the WQFN package is highly recommended to improve
board assembly yields. If the via and aperture openings are not carefully monitored, the solder may flow
unevenly through the DAP. Stencil parameters for aperture opening and via locations are shown below:
Figure 40. No Pullback WQFN, Single Row Reference Diagram
Table 11. No Pullback WQFN Stencil Aperture Summary for DS90UB914A-Q1
DEVICE
PIN
COUNT
DS90UB914A-Q1
48
MKT DWG
PCB I/O PAD
SIZE (mm)
PCB
PITCH
(mm)
PCB DAP
SIZE(mm)
STENCIL I/O
APERTURE
(mm)
STENCIL
DAP
APERTURE
(mm)
NUMBER OF
DAP
APERTURE
OPENINGS
GAP
BETWEEN
DAP
APERTURE
(Dim A mm)
RHS
0.25 x 0.6
0.5
5.1 x 5.1
0.25 x 0.7
1.1 x 1.1
16
0.2
Figure 41. 48-Pin WQFN Stencil Example of Via and Opening Placement
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
53
DS90UB914A-Q1
SNLS499A – APRIL 2016 – REVISED JUNE 2016
www.ti.com
RIN+
Coax
Routing
RIN-
STP
Routing
LVCMOS
Routing
RIN±
CMLOUT
Routing
CMLOUTP/N
Figure 42. DS90UB914A-Q1 Deserializer Example Layout
The following PCB layout examples are derived from the layout design of the DS90UB914A-Q1 Evaluation
Module (SNLU135). These graphics and additional layout description are used to demonstrate both proper
routing and proper solder techniques when designing in this Deserializer.
54
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
DS90UB914A-Q1
www.ti.com
SNLS499A – APRIL 2016 – REVISED JUNE 2016
12 Device and Documentation Support
12.1 Documentation Support
12.1.1 Related Documentation
For related documentation see the following:
• DS90UB913A-CXEVM & DS90UB914A-CXEVM REV A User's Guide, SNLU135
• I2C over DS90UB913/4 FPD-Link III with Bidirectional Control Channel, SNLA222
• Sending Power Over Coax in DS90UB913A Designs, SNLA224
• Soldering Specifications Application Report, SNOA549
• IC Package Thermal Metrics Application Report, SPRA953
• Leadless Leadframe Package (LLP) Application Report, SNOA401
• LVDS Owner's Manual, SNLA187
• Cable Requirements for the DS90UB913A & DS90UB914A, SNLA229
12.2 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
12.3 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
12.4 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
12.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: DS90UB914A-Q1
55
PACKAGE OPTION ADDENDUM
www.ti.com
14-Jun-2016
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
Lead/Ball Finish
MSL Peak Temp
(2)
(6)
(3)
Op Temp (°C)
Device Marking
(4/5)
DS90UB914ATRHSJQ1
ACTIVE
WQFN
RHS
48
2500
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 105
UB914AQ
DS90UB914ATRHSRQ1
ACTIVE
WQFN
RHS
48
1000
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 105
UB914AQ
DS90UB914ATRHSTQ1
ACTIVE
WQFN
RHS
48
250
Green (RoHS
& no Sb/Br)
CU SN
Level-3-260C-168 HR
-40 to 105
UB914AQ
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3)
MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4)
There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5)
Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6)
Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
Addendum-Page 1
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
14-Jun-2016
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
Addendum-Page 2
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jun-2016
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
A0
Diameter Width (mm)
(mm) W1 (mm)
B0
(mm)
K0
(mm)
P1
(mm)
W
Pin1
(mm) Quadrant
DS90UB914ATRHSJQ1
WQFN
RHS
48
2500
330.0
16.4
7.3
7.3
1.3
12.0
16.0
Q1
DS90UB914ATRHSRQ1
WQFN
RHS
48
1000
330.0
16.4
7.3
7.3
1.3
12.0
16.0
Q1
DS90UB914ATRHSTQ1
WQFN
RHS
48
250
178.0
16.4
7.3
7.3
1.3
12.0
16.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
14-Jun-2016
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
DS90UB914ATRHSJQ1
WQFN
RHS
48
2500
367.0
367.0
38.0
DS90UB914ATRHSRQ1
WQFN
RHS
48
1000
367.0
367.0
38.0
DS90UB914ATRHSTQ1
WQFN
RHS
48
250
213.0
191.0
55.0
Pack Materials-Page 2
MECHANICAL DATA
RHS0048A
SQA48A (Rev B)
www.ti.com
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.
Products
Applications
Audio
www.ti.com/audio
Automotive and Transportation
www.ti.com/automotive
Amplifiers
amplifier.ti.com
Communications and Telecom
www.ti.com/communications
Data Converters
dataconverter.ti.com
Computers and Peripherals
www.ti.com/computers
DLP® Products
www.dlp.com
Consumer Electronics
www.ti.com/consumer-apps
DSP
dsp.ti.com
Energy and Lighting
www.ti.com/energy
Clocks and Timers
www.ti.com/clocks
Industrial
www.ti.com/industrial
Interface
interface.ti.com
Medical
www.ti.com/medical
Logic
logic.ti.com
Security
www.ti.com/security
Power Mgmt
power.ti.com
Space, Avionics and Defense
www.ti.com/space-avionics-defense
Microcontrollers
microcontroller.ti.com
Video and Imaging
www.ti.com/video
RFID
www.ti-rfid.com
OMAP Applications Processors
www.ti.com/omap
TI E2E Community
e2e.ti.com
Wireless Connectivity
www.ti.com/wirelessconnectivity
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2016, Texas Instruments Incorporated
Similar pages