Gennum GS1531 Multi-rate serializer with clockcleaner Datasheet

GS1531 HD-LINX® II
Multi-Rate Serializer with ClockCleaner™
GS1531 Data Sheet
Key Features
Description
•
SMPTE 292M and SMPTE 259M-C compliant
scrambling and NRZ → NRZI encoding (with
bypass)
•
DVB-ASI sync word insertion and 8b/10b encoding
•
Rejection of more than 300ps jitter on the input
PCLK
The GS1531 is a multi-standard serializer with an
integrated cable driver. When used in conjunction with
the GO1555/GO1525* Voltage Controlled Oscillator, a
transmit solution can be realized for HD-SDI, SD-SDI
and DVB-ASI applications.
•
User selectable additional processing features
including:
•
CRC, ANC data checksum, and line number
calculation and insertion
•
TRS and EDH packet generation and insertion
•
illegal code remapping
•
Internal flywheel for noise immune TRS generation
•
20-bit / 10-bit CMOS parallel input data bus
•
148.5MHz / 74.25MHz / 27MHz / 13.5MHz parallel
digital input
•
Automatic standards detection and indication
•
1.8V core power supply and 3.3V charge pump
power supply
•
3.3V digital I/O supply
•
JTAG test interface
•
Available in a Pb-free package
•
small footprint (11mm x 11mm)
Applications
•
SMPTE 292M Serial Digital Interfaces
•
SMPTE 259M-C Serial Digital Interfaces
•
DVB-ASI Serial Digital Interfaces
The device features an internal PLL, which can be
configured for loop bandwidth as narrow as 100kHz.
Thus the GS1531 can tolerate in excess of 300ps jitter
on the input PCLK and still provide output jitter well
within SMPTE specification. Connect the output clocks
from Gennum’s GS4911 clock generator directly to the
GS1531’s PCLK input and configure the GS1531’s loop
bandwidth accordingly.
In addition to serializing the input, the GS1531 performs
NRZ-to-NRZI encoding and scrambling as per SMPTE
292M/259M-C when operating in SMPTE mode. When
operating in DVB-ASI mode, the device will insert K28.5
sync characters and 8b/10b encode the data prior to
serialization.
Parallel data inputs are provided for 10-bit multiplexed
or 20-bit demultiplexed formats at both HD and SD
signal rates. An appropriate parallel clock input signal is
also required.
The integrated cable driver features an output mute on
loss of parallel clock, high impedance mode, adjustable
signal swing, and automatic dual slew rate selection
depending on HD/SD operational requirements.
The GS1531 also includes a range of data processing
functions including automatic standards detection and
EDH support. The device can also insert TRS signals,
calculate and insert line numbers and CRC’s, re-map
illegal code words and insert SMPTE 352M payload
identifier packets. All processing features are optional
and may be enabled/disabled via external control pin(s)
and/or host interface programming.
*For new designs use GO1555
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GS1531 Data Sheet
Functional Block Diagram
VCO_GND
LF
VCO_VCC
LB_CONT
VCO
VCO
CP_CAP
PCLK
LOCKED
F
V
H
DETECT_TRS
DVB_ASI
IOPROC_EN/DIS
SMPTE_BYPASS
BLANK
SD/HD
20bit/10bit
Phase detector, charge pump,
VCO control & power supply
HOST Interface /
JTAG test
sd/hd
bypass
DIN[19:0]
TRS insertion,
Line number
insertion,
CRC insertion,
data blank, codere-map and
flywheel
I/O
Buffer
&
demux
dvb-asi
ClockCleaner™
SDO_EN/DIS
DVB-ASI sync
word insert &
8b/10b encode
SMPTE
352M
generation
EDH
generation
& SMPTE
scramble
SDO
P -> S
SDO
RSET
Reset
RESET_TRST
SDOUT_TDO
SDIN_TDI
SCLK_TCK
CS_TMS
JTAG/HOST
GS1531 Functional Block Diagram
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GS1531 Data Sheet
Contents
Key Features .................................................................................................................1
Applications...................................................................................................................1
Description ....................................................................................................................1
Functional Block Diagram .............................................................................................2
1. Pin Out .....................................................................................................................5
1.1 Pin Assignment ...............................................................................................5
1.2 Pin Descriptions ..............................................................................................6
2. Electrical Characteristics ........................................................................................13
2.1 Absolute Maximum Ratings ..........................................................................13
2.2 DC Electrical Characteristics ........................................................................13
2.3 AC Electrical Characteristics.........................................................................14
2.4 Solder Reflow Profiles...................................................................................16
3. Input/Output Circuits ..............................................................................................17
3.1 Host Interface Maps ......................................................................................19
3.1.1 Host Interface Map (Read Only Registers) .........................................20
3.1.2 Host Interface Map (R/W Configurable Registers) .............................21
4. Detailed Description ...............................................................................................22
4.1 Functional Overview .....................................................................................22
4.2 Parallel Data Inputs.......................................................................................22
4.2.1 Parallel Input in SMPTE Mode............................................................23
4.2.2 Parallel Input in DVB-ASI Mode..........................................................23
4.2.3 Parallel Input in Data-Through Mode ..................................................23
4.2.4 Parallel Input Clock (PCLK) ................................................................24
4.3 SMPTE Mode................................................................................................25
4.3.1 Internal Flywheel.................................................................................25
4.3.2 HVF Timing Signal Extraction .............................................................25
4.4 DVB-ASI mode..............................................................................................26
4.4.1 Control Signal Inputs ..........................................................................27
4.5 Data-Through Mode ......................................................................................28
4.6 Additional Processing Functions...................................................................28
4.6.1 Input Data Blank .................................................................................28
4.6.2 Automatic Video Standard Detection..................................................28
4.6.3 Packet Generation and Insertion ........................................................30
4.7 Parallel-To-Serial Conversion .......................................................................37
4.8 Serial Digital Data PLL..................................................................................38
4.8.1 External VCO......................................................................................38
4.8.2 Lock Detect Output .............................................................................38
4.8.3 Loop Bandwidth Adjustment ...............................................................39
4.9 Serial Digital Output ......................................................................................39
4.9.1 Output Swing ......................................................................................39
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GS1531 Data Sheet
4.9.2 Serial Digital Output Mute...................................................................40
4.10 GSPI Host Interface ....................................................................................40
4.10.1 Command Word Description.............................................................41
4.10.2 Data Read and Write Timing ............................................................42
4.10.3 Configuration and Status Registers ..................................................43
4.11 JTAG...........................................................................................................43
4.12 Device Power Up ........................................................................................45
4.13 Device Reset...............................................................................................45
5. Application Reference Design ................................................................................46
5.1 Typical Application Circuit .............................................................................46
6. References & Relevant Standards.........................................................................47
7. Package & Ordering Information............................................................................48
7.1 Package Dimensions ....................................................................................48
7.2 Packaging Data.............................................................................................49
7.3 Ordering Information .....................................................................................49
8. Revision History .....................................................................................................50
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GS1531 Data Sheet
1. Pin Out
1.1 Pin Assignment
A
B
1
2
3
4
5
6
LF
VCO_
VCC
VCO_
GND
VCO
VCO
NC
LB_
CONT
NC
NC
NC
CP_CAP CP_VDD CP_GND
C
NC
D
NC
NC
NC
NC
E
NC
NC
NC
SD/HD
F
RSV
NC
NC
G
NC
NC
NC
H
NC
NC
NC
CS_
TMS
J
NC
NC
NC
K
RSET
CD_VDD
SDO
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PD_VDD PD_GND
8
9
10
PCLK
IO_VDD
DIN18
DIN19
NC
DETECT
_TRS
IO_GND
DIN16
DIN17
NC
NC
NC
DIN14
DIN15
NC
NC
DIN12
DIN13
DVB_ASI LOCKED
7
CORE
_GND
CORE
_VDD
NC
IO_VDD
DIN10
DIN11
CORE
_GND
CORE
_VDD
NC
IO_GND
DIN8
DIN9
10bit
IOPROC
_EN/DIS
SMPTE_
BYPASS
RESET
_TRST
NC
BLANK
DIN6
DIN7
SCLK
_TCK
SDOUT
_TDO
NC
H
DIN4
DIN5
NC
SDO_EN
/DIS
SDIN
_TDI
V
IO_GND
DIN2
DIN3
SD0
CD_GND
JTAG/
HOST
F
IO_VDD
DIN0
DIN1
20bit/
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GS1531 Data Sheet
1.2 Pin Descriptions
Table 1-1: Pin Descriptions
Pin
Number
Name
Timing
Type
Description
A1
LF
Analog
Output
Control voltage to external voltage controlled oscillator. Nominally +1.25V
DC.
A2
VCO_VCC
–
Output
Power
Power supply for the external voltage controlled oscillator. Connect to pin
7 of the GO1555/GO1525*. This pin is an output.
Should be isolated from all other power supplies.
*For new designs use GO1555
A3
VCO_GND
–
Output
Power
Ground reference for the external voltage controlled oscillator. Connect to
pins 2, 4, 6, and 8 of the GO1555/GO1525*. This pin is an output.
Should be isolated from all other grounds.
*For new designs use GO1555
A4, A5
VCO, VCO
Analog
Input
Differential inputs for the external VCO reference signal. For single ended
devices such as the GO1555/GO1525*, VCO should be AC coupled to
VCO_GND.
VCO is nominally 1.485GHz.
*For new designs use GO1555
A6, B5,
B6, C1,
C4, C5,
C6, C7,
C8, D1,
D2, D3,
D4, D7,
D8, E1,
E2, E3,
E7, F2,
F3, F7,
G1, G2,
G3, G7,
H1, H2,
H3, H7,
J1, J2,
J3, J4
NC
–
–
A7
PCLK
–
Input
A8, E8, K8
IO_VDD
–
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Power
No connect.
PARALLEL DATA BUS CLOCK
Signal levels are LVCMOS/LVTTL compatible.
HD 20-bit mode
PCLK = 74.25MHz or 74.25/1.001MHz
HD 10-bit mode
PCLK = 148.5MHz or 148.5/1.001MHz
SD 20-bit mode
PCLK = 13.5MHz
SD 10-bit mode
PCLK = 27MHz
Power supply connection for digital I/O buffers. Connect to +3.3V DC
digital.
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GS1531 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
Description
A10, A9,
B10, B9,
C10, C9,
D10, D9,
E10, E9
DIN[19:10]
Synchronous
with PCLK
Input
PARALLEL DATA BUS
Signal levels are LVCMOS/LVTTL compatible.
DIN19 is the MSB and DIN10 is the LSB.
HD 20-bit mode
SD/HD = LOW
20bit/10bit = HIGH
Luma data input in SMPTE mode
SMPTE_BYPASS = HIGH
DVB_ASI = LOW
Data input in Data-Through mode
SMPTE_BYPASS = LOW
DVB_ASI = LOW
HD 10-bit mode
SD/HD = LOW
20bit/10bit = LOW
Multiplexed Luma and Chroma data input
in SMPTE mode
SMPTE_BYPASS = HIGH
DVB_ASI = LOW
Data input in Data-Through mode
SMPTE_BYPASS = LOW
DVB_ASI = LOW
SD 20-bit mode
SD/HD = HIGH
20bit/10bit = HIGH
Luma data input in SMPTE mode
SMPTE_BYPASS = HIGH
DVB_ASI = LOW
Data input in Data-Through mode
SMPTE_BYPASS = LOW
DVB_ASI = LOW
DVB-ASI data input in DVB-ASI mode
SMPTE_BYPASS = LOW
DVB_ASI = HIGH
SD 10-bit mode
SD/HD = HIGH
20bit/10bit = LOW
Multiplexed Luma and Chroma data input
in SMPTE mode
SMPTE_BYPASS = HIGH
DVB_ASI = LOW
Data input in data through mode
SMPTE_BYPASS = LOW
DVB_ASI = LOW
DVB-ASI data input in DVB-ASI mode
SMPTE_BYPASS = LOW
DVB_ASI = HIGH
B1
CP_CAP
Analog
Input
PLL lock time constant capacitor connection.
B2
CP_VDD
–
Power
Power supply connection for the charge pump. Connect to +3.3V DC
analog.
B3
CP_GND
–
Power
Ground connection for the charge pump. Connect to analog GND.
B4
LB_CONT
Analog
Input
Control voltage to set the loop bandwidth of the integrated reclocker.
B7
DETECT_TRS
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to select the timing mode of the device.
When set HIGH, the device will lock the internal flywheel to the embedded
TRS timing signals in the parallel input data.
When set LOW, the device will lock the internal flywheel to the externally
supplied H, V, and F input signals.
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GS1531 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
Description
B8, F8, J8
IO_GND
–
Power
Ground connection for digital I/O buffers. Connect to digital GND.
C2
PD_VDD
–
Power
Power supply connection for the phase detector. Connect to +1.8V DC
analog.
C3
PD_GND
–
Power
Ground connection for the phase detector. Connect to analog GND.
D5
DVB_ASI
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
When set HIGH in conjunction with SD/HD = HIGH and SMPTE_BYPASS
= LOW, the device will be configured to operate in DVB-ASI mode.
When set LOW, the device will not support the encoding of received
DVB-ASI data.
D6
LOCKED
Synchronous
with PCLK
Output
STATUS SIGNAL OUTPUT
Signal levels are LVCMOS / LVTTL compatible.
The LOCKED signal will be HIGH whenever the device has correctly
received and locked to SMPTE compliant data in SMPTE mode or
DVB-ASI compliant data in DVB-ASI mode, or when the device has
achieved lock in Data-Through mode.
It will be LOW otherwise.
E4
SD/HD
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
When set LOW, the device will be configured to transmit signal rates of
1.485Gb/s or 1.485/1.001Gb/s only.
When set HIGH, the device will be configured to transmit signal rates of
270Mb/s only.
E5, F5
CORE_GND
–
Power
Ground connection for the digital core logic. Connect to digital GND.
E6, F6
CORE_VDD
–
Power
Power supply connection for the digital core logic. Connect to +1.8V DC
digital.
F1
RSV
–
–
F4
20bit/10bit
Non
Synchronous
Input
Connect to Analog GND.
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to select the input data bus width in SMPTE or Data-Through
modes.
When set HIGH, the parallel input will be 20-bit demultiplexed data.
When set LOW, the parallel input will be 10-bit multiplexed data.
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GS1531 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
Description
F10, F9,
G10, G9,
H10, H9,
J10, J9,
K10, K9
DIN[9:0]
Synchronous
with PCLK
Input
PARALLEL DATA BUS
Signal levels are LVCMOS/LVTTL compatible.
DIN9 is the MSB and DIN0 is the LSB.
HD 20-bit mode
SD/HD = LOW
20bit/10bit = HIGH
Chroma data input in SMPTE mode
SMPTE_BYPASS =HIGH
DVB_ASI = LOW
Data input in Data-Through mode
SMPTE_BYPASS = LOW
DVB_ASI = LOW
HD 10-bit mode
SD/HD = LOW
20bit/10bit = LOW
High impedance in all modes.
SD 20-bit mode
SD/HD = HIGH
20bit/10bit = HIGH
Chroma data input in SMPTE mode
SMPTE_BYPASS = HIGH
DVB_ASI = LOW
Data input in Data-Through mode
SMPTE_BYPASS = LOW
DVB_ASI = LOW
High impedance in DVB-ASI mode
SMPTE_BYPASS = LOW
DVB_ASI = HIGH
SD 10-bit mode
SD/HD = HIGH
20bit/10bit = LOW
G4
IOPROC_EN/DIS
Non
Synchronous
Input
High impedance in all modes.
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to enable or disable I/O processing features.
When set HIGH, the following I/O processing features of the device are
enabled:
• EDH Packet Generation and Insertion (SD-only)
• SMPTE 352M Packet Generation and Insertion
• ANC Data Checksum Calculation and Insertion
• Line-based CRC Generation and Insertion (HD-only)
• Line Number Generation and Insertion (HD-only)
• TRS Generation and Insertion
• Illegal Code Remapping
To enable a subset of these features, keep IOPROC_EN/DIS HIGH and
disable the individual feature(s) in the IOPROC_DISABLE register
accessible via the host interface.
When set LOW, the I/O processing features of the device are disabled,
regardless of whether the features are enabled in the IOPROC_DISABLE
register.
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GS1531 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
G5
SMPTE_BYPASS
Non
Synchronous
Input
Description
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
When set HIGH in conjunction with DVB_ASI = LOW, the device will be
configured to operate in SMPTE mode. All I/O processing features may be
enabled in this mode.
When set LOW, the device will not support the scrambling or encoding of
received SMPTE data. No I/O processing features will be available.
G6
RESET_TRST
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to reset the internal operating conditions to default settings and to
reset the JTAG test sequence.
Host Mode (JTAG/HOST = LOW)
When asserted LOW, all functional blocks will be set to default conditions
and all input and output signals become high impedance, including the
serial digital outputs SDO and SDO.
Must be set HIGH for normal device operation.
JTAG Test Mode (JTAG/HOST = HIGH)
When asserted LOW, all functional blocks will be set to default and the
JTAG test sequence will be held in reset.
When set HIGH, normal operation of the JTAG test sequence resumes.
G8
BLANK
Synchronous
with PCLK
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to enable or disable input data blanking.
When set LOW, the luma and chroma input data is set to the appropriate
blanking levels. Horizontal and vertical ancillary spaces will also be set to
blanking levels.
When set HIGH, the luma and chroma input data pass through the device
unaltered.
H4
CS_TMS
Synchronous
with
SCLK_TCK
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Chip Select / Test Mode Select
Host Mode (JTAG/HOST = LOW)
CS_TMS operates as the host interface chip select, CS, and is active
LOW.
JTAG Test Mode (JTAG/HOST = HIGH)
CS_TMS operates as the JTAG test mode select, TMS, and is active
HIGH.
NOTE: If the host interface is not being used, tie this pin HIGH.
H5
SCLK_TCK
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Serial Data Clock / Test Clock.
Host Mode (JTAG/HOST = LOW)
SCLK_TCK operates as the host interface burst clock, SCLK. Command
and data read/write words are clocked into the device synchronously with
this clock.
JTAG Test Mode (JTAG/HOST = HIGH)
SCLK_TCK operates as the JTAG test clock, TCK.
NOTE: If the host interface is not being used, tie this pin HIGH.
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GS1531 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
Description
H6
SDOUT_TDO
Synchronous
with
SCLK_TCK
Output
CONTROL SIGNAL OUTPUT
Signal levels are LVCMOS/LVTTL compatible.
Serial Data Output / Test Data Output
Host Mode (JTAG/HOST = LOW)
SDOUT_TDO operates as the host interface serial output, SDOUT, used
to read status and configuration information from the internal registers of
the device.
JTAG Test Mode (JTAG/HOST = HIGH)
SDOUT_TDO operates as the JTAG test data output, TDO.
H8
H
Synchronous
with PCLK
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to indicate the portion of the video line containing active video data
when DETECT_TRS is set LOW. The device will set the H bit in all
outgoing TRS signals for the entire period that the H input signal is HIGH
(IOPROC_EN/DIS must also be HIGH).
H signal timing is configurable via the H_CONFIG bit of the
IOPROC_DISABLE register, accessible via the host interface.
Active Line Blanking (H_CONFIG = 0h)
The H signal should be set HIGH for the entire horizontal blanking period,
including the EAV and SAV TRS words, and LOW otherwise. This is the
default setting.
TRS Based Blanking (H_CONFIG = 1h)
The H signal should be set HIGH for the entire horizontal blanking period
as indicated by the H bit in the received TRS ID words, and LOW
otherwise.
J5
SDO_EN/DIS
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to enable or disable the serial digital output stage.
When set LOW, the serial digital output signals SDO and SDO are
disabled and become high impedance.
When set HIGH, the serial digital output signals SDO and SDO are
enabled.
J6
SDIN_TDI
Synchronous
with
SCLK_TCK
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Serial Data In / Test Data Input
Host Mode (JTAG/HOST = LOW)
SDIN_TDI operates as the host interface serial input, SDIN, used to write
address and configuration information to the internal registers of the
device.
JTAG Test Mode (JTAG/HOST = HIGH)
SDIN_TDI operates as the JTAG test data input, TDI.
NOTE: If the host interface is not being used, tie this pin HIGH.
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GS1531 Data Sheet
Table 1-1: Pin Descriptions (Continued)
Pin
Number
Name
Timing
Type
Description
J7
V
Synchronous
with PCLK
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to indicate the portion of the video field / frame that is used for
vertical blanking when DETECT_TRS is set LOW. The device will set the
V bit in all outgoing TRS signals for the entire period that the V input signal
is HIGH (IOPROC_EN/DIS must also be HIGH).
The V signal should be set HIGH for the entire vertical blanking period and
should be set LOW for all lines outside of the vertical blanking interval.
The V signal is ignored when DETECT_TRS = HIGH.
K1
RSET
Analog
Input
Used to set the serial digital output signal amplitude. Connect to CD_VDD
through 281Ω +/- 1% for 800mVp-p single-ended output swing.
K2
CD_VDD
–
Power
Power supply connection for the serial digital cable driver. Connect to
+1.8V DC analog.
K3, K4
SDO, SDO
Analog
Output
Serial digital output signal operating at 1.485Gb/s, 1.485/1.001Gb/s, or
270Mb/s.
The slew rate of these outputs is automatically controlled to meet SMPTE
292M and 259M requirements according to the setting of the SD/HD pin.
K5
CD_GND
–
Power
Ground connection for the serial digital cable driver. Connect to analog
GND.
K6
JTAG/HOST
Non
Synchronous
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to select JTAG Test Mode or Host Interface Mode.
When set HIGH, CS_TMS, SDOUT_TDO, SDI_TDI and SCLK_TCK are
configured for JTAG boundary scan testing.
When set LOW, CS_TMS, SDOUT_TDO, SDI_TDI and SCLK_TCK are
configured as GSPI pins for normal host interface operation.
K7
F
Synchronous
with PCLK
Input
CONTROL SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
Used to indicate the ODD / EVEN field of the video signal when
DETECT_TRS is set LOW. The device will set the F bit in all outgoing TRS
signals for the entire period that the F input signal is HIGH
(IOPROC_EN/DIS must also be HIGH).
The F signal should be set HIGH for the entire period of field 2 and should
be set LOW for all lines in field 1 and for all lines in progressive scan
systems.
The F signal is ignored when DETECT_TRS = HIGH.
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GS1531 Data Sheet
2. Electrical Characteristics
2.1 Absolute Maximum Ratings
Parameter
Value/Units
Supply Voltage Core
-0.3V to +2.1V
Supply Voltage I/O
-0.3V to +4.6V
Input Voltage Range (any input)
-2.0V to + 5.25V
Ambient Operating Temperature
-20°C < TA < 85°C
Storage Temperature
-40°C < TSTG < 125°C
ESD Protection On All Pins (see Note 1)
1kV
NOTES:
1. HBM, per JESDA-114B.
2.2 DC Electrical Characteristics
Table 2-1: DC Electrical Characteristics
TA = 0°C to 70°C, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test
Level
Notes
Operation Temperature Range
TA
–
0
–
70
°C
3
1
Digital Core Supply Voltage
CORE_VDD
–
1.71
1.8
1.89
V
3
1
Digital I/O Supply Voltage
IO_VDD
–
3.13
3.3
3.47
V
3
1
Charge Pump Supply Voltage
CP_VDD
–
3.13
3.3
3.47
V
3
1
Phase Detector Supply Voltage
PD_VDD
–
1.71
1.8
1.89
V
3
1
Input Buffer Supply Voltage
BUFF_VDD
–
1.71
1.8
1.89
V
3
1
Cable Driver Supply Voltage
CD_VDD
–
1.71
1.8
1.89
V
3
1
External VCO Supply Voltage
Output
VCO_VCC
–
2.25
–
2.75
V
1
–
+1.8V Supply Current
I1V8
SDO Enabled
–
–
245
mA
3
3
+3.3V Supply Current
I3V3
–
–
–
45
mA
3
4
Total Device Power
PD
SDO Enabled
–
–
590
mW
3
–
System
30573 - 7
February 2008
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GS1531 Data Sheet
Table 2-1: DC Electrical Characteristics (Continued)
TA = 0°C to 70°C, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test
Level
Notes
Input Logic LOW
VIL
–
–
–
0.8
V
4
–
Input Logic HIGH
VIH
–
2.1
–
–
V
4
–
Output Logic LOW
VOL
+8mA
–
0.2
0.4
V
4
–
Output Logic HIGH
VOH
-8mA
IO_VDD - 0.4
–
–
V
4
–
VRSET
RSET=281Ω
0.54
0.6
0.66
V
1
2
VCMOUT
75Ω load,
RSET=281Ω,
SD and HD
0.8
1.0
1.2
V
1
–
Digital I/O
Input
RSET Voltage
Output
Output Common Mode Voltage
TEST LEVELS
NOTES
1. Production test at room temperature and nominal supply
voltage with guardbands for supply and temperature ranges.
2. Production test at room temperature and nominal supply
voltage with guardbands for supply and temperature ranges
using correlated test.
3. Production test at room temperature and nominal supply
voltage.
4. QA sample test.
5. Calculated result based on Level 1, 2, or 3.
6. Not tested. Guaranteed by design simulations.
7. Not tested. Based on characterization of nominal parts.
8. Not tested. Based on existing design/characterization data of
similar product.
9. Indirect test.
1.
2.
3.
4.
All DC and AC electrical parameters within specification.
Set by the value of the RSET resistor.
Sum of all 1.8V supplies.
Sum of all 3.3V supplies.
2.3 AC Electrical Characteristics
Table 2-2: AC Electrical Characteristics
TA = 0°C to 70°C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test
Level
Notes
–
10-bit SD
–
21
–
PCLK
8
–
–
–
20-bit HD
–
19
–
PCLK
8
–
DVB-ASI
–
11
–
PCLK
8
–
treset
–
1
–
–
ms
8
1
System
Device Latency
Reset Pulse Width
30573 - 7
February 2008
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GS1531 Data Sheet
Table 2-2: AC Electrical Characteristics (Continued)
TA = 0°C to 70°C, unless otherwise shown
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Test
Level
Notes
Parallel Clock Frequency
fPCLK
–
13.5
–
148.5
MHz
4
–
Parallel Clock Duty Cycle
DCPCLK
–
40
–
60
%
6
–
Input Data Setup Time
tsu
–
2.0
–
–
ns
5
–
Input Data Hold Time
tih
–
1.5
–
–
ns
5
–
DRSDO
–
–
1.485
–
Gb/s
1
–
–
–
1.485/1.001
–
Gb/s
9
–
Parallel Input
Serial Digital Output
Serial Output Data Rate
–
–
270
–
Mb/s
1
–
650
800
950
mVp-p
1
–
HD signal
–
–
260
ps
1
–
trSDO
SD signal
400
550
1500
ps
1
–
Serial Output Fall Time
20% ~ 80%
tfSDO
HD signal
–
–
260
ps
1
–
tfSDO
SD signal
400
550
1500
ps
1
–
Serial Output Intrinsic Jitter
tIJ
Pseudorandom and
pathological HD signal
–
90
125
ps
5
–
tIJ
Pseudorandom and
pathological SD signal
–
270
350
ps
5
–
–
6.6
MHz
8
–
Serial Output Swing
ΔVSDD
RSET = 281Ω
75Ω load
Serial Output Rise Time
20% ~ 80%
trSDO
GSPI
GSPI Input Clock Frequency
fSCLK
–
–
GSPI Input Clock Duty Cycle
DCSCLK
–
40
–
60
%
8
–
GSPI Input Data Setup Time
–
–
0
–
–
ns
8
–
GSPI Input Data Hold Time
–
–
1.43
–
–
ns
8
–
GSPI Output Data Hold Time
–
–
2.1
–
–
ns
8
–
GSPI Output Data Delay
Time
–
–
–
–
7.27
ns
8
–
TEST LEVELS
NOTES
1. Production test at room temperature and nominal supply voltage
with guardbands for supply and temperature ranges.
2. Production test at room temperature and nominal supply voltage
with guardbands for supply and temperature ranges using
correlated test.
3. Production test at room temperature and nominal supply voltage.
4. QA sample test.
5. Calculated result based on Level 1, 2, or 3.
6. Not tested. Guaranteed by design simulations.
7. Not tested. Based on characterization of nominal parts.
8. Not tested. Based on existing design/characterization data of
similar product.
9. Indirect test.
1. See Device Power Up on page 45, Figure 4-12.
30573 - 7
February 2008
15 of 50
GS1531 Data Sheet
2.4 Solder Reflow Profiles
The GS1531 is available in a Pb or Pb-free package. It is recommended that the
Pb package be soldered with Pb paste using the Standard Eutectic profile shown
in Figure 2-1, and the Pb-free package be soldered with Pb-free paste using the
reflow profile shown in Figure 2-2.
NOTE: It is possible to solder a Pb-free package with Pb paste using a Standard
Eutectic profile with a reflow temperature maintained at 245oC – 250oC.
60-150 sec.
Temperature
10-20 sec.
230˚C
220˚C
3˚C/sec max
183˚C
6˚C/sec max
150˚C
100˚C
25˚C
Time
120 sec. max
6 min. max
Figure 2-1: Standard Eutectic Solder Reflow Profile (Pb package, Pb paste)
Temperature
60-150 sec.
20-40 sec.
260˚C
250˚C
3˚C/sec max
217˚C
6˚C/sec max
200˚C
150˚C
25˚C
Time
60-180 sec. max
8 min. max
Figure 2-2: Maximum Pb-free Solder Reflow Profile (Pb-free package, Pb-free
paste)
30573 - 7
February 2008
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GS1531 Data Sheet
3. Input/Output Circuits
All resistors in ohms, all capacitors in farads, unless otherwise shown.
SDO
SDO
Figure 3-1: Serial Digital Output
LF
CP_CAP
300
Figure 3-2: VCO Control Output & PLL Lock Time Capacitor
VDD
42K
63K
PCLK
Figure 3-3: PCLK Input
30573 - 7
February 2008
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GS1531 Data Sheet
VCO
VDD
25
1.5K
5K
25
VCO
Figure 3-4: VCO Input
LB_CONT
865mV
7.2K
Figure 3-5: PLL Loop Bandwidth Control
30573 - 7
February 2008
18 of 50
IOPROC_DISABLE
EDH_FLAG
VIDEO_STANDARD
VIDEO_FORMAT_B
VIDEO_FORMAT_A
FF_LINE_END_F1
FF_LINE_START_F1
FF_LINE_END_F0
FF_LINE_START_F0
AP_LINE_END_F1
AP_LINE_START_F1
AP_LINE_END_F0
AP_LINE_START_F0
RASTER_STRUCTURE4
RASTER_STRUCTURE3
RASTER_STRUCTURE2
RASTER_STRUCTURE1
REGISTER NAME
LINE_352M_f2
LINE_352M_f1
03h
02h
01h
00h
ADDRESS
1Ch
1Bh
1Ah
19h
18h
17h
16h
15h
14h
13h
12h
11h
10h
0Fh
0Eh
0Dh
0Ch
0Bh
0Ah
09h
08h
07h
06h
05h
04h
Not Used
Not Used
Not Used
VF4-b7
VF2-b7
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
15
Not Used
Not Used
Not Used
ANC-IDA
VDS-b3
VF4-b5
VF2-b5
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
13
Not Used
Not Used
30573 - 7
Not Used
ANC-UES
VDS-b4
VF4-b6
VF2-b6
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
14
Not Used
Not Used
3.1 Host Interface Maps
Not Used
ANC-EDA
VDS-b1
VF4-b3
VF2-b3
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
b11
b11
11
Not Used
Not Used
February 2008
Not Used
ANC-IDH
VDS-b2
VF4-b4
VF2-b4
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
12
Not Used
Not Used
Not Used
ANC-EDH
VDS-b0
VF4-b2
VF2-b2
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
b10
b10
b10
b10
10
b10
b10
Not Used
FF-UES
INT_PROG
VF4-b1
VF2-b1
b9
b9
b9
b9
b9
b9
b9
b9
b9
b9
b9
b9
9
b9
b9
H_CONFIG
FF-IDA
STD_
LOCK
VF4-b0
VF2-b0
b8
b8
b8
b8
b8
b8
b8
b8
b8
b8
b8
b8
8
b8
b8
Not Used
FF-IDH
NOT USED
VF3-b7
VF1-b7
b7
b7
b7
b7
b7
b7
b7
b7
b7
b7
b7
b7
7
b7
b7
352M_INS
FF-EDA
NOT USED
VF3-b6
VF1-b6
b6
b6
b6
b6
b6
b6
b6
b6
b6
b6
b6
b6
6
b6
b6
ILLEGAL_RE
MAP
FF-EDH
NOT USED
VF3-b5
VF1-b5
b5
b5
b5
b5
b5
b5
b5
b5
b5
b5
b5
b5
5
b5
b5
4
EDH_CRC_IN
S
AP-UES
NOT USED
VF3-b4
VF1-b4
b4
b4
b4
b4
b4
b4
b4
b4
b4
b4
b4
b4
b4
b4
3
ANC_
CSUM_INS
AP-IDA
NOT USED
VF3-b3
VF1-b3
b3
b3
b3
b3
b3
b3
b3
b3
b3
b3
b3
b3
b3
b3
CRC_INS
AP-IDH
NOT USED
VF3-b2
VF1-b2
b2
b2
b2
b2
b2
b2
b2
b2
b2
b2
b2
b2
2
b2
b2
TRS_INS
AP-EDH
NOT USED
VF3-b0
VF1-b0
b0
b0
b0
b0
b0
b0
b0
b0
b0
b0
b0
b0
0
b0
b0
19 of 50
LNUM_ INS
AP-EDA
NOT USED
VF3-b1
VF1-b1
b1
b1
b1
b1
b1
b1
b1
b1
b1
b1
b1
b1
1
b1
b1
GS1531 Data Sheet
VIDEO_STANDARD
RASTER_STRUCTURE4
RASTER_STRUCTURE3
RASTER_STRUCTURE2
RASTER_STRUCTURE1
REGISTER NAME
03h
02h
01h
00h
ADDRESS
1Ch
1Bh
1Ah
19h
18h
17h
16h
15h
14h
13h
12h
11h
10h
0Fh
0Eh
0Dh
0Ch
0Bh
0Ah
09h
08h
07h
06h
05h
04h
15
VDS-b3
13
30573 - 7
VDS-b4
14
VDS-b1
b11
b11
11
February 2008
VDS-b2
12
VDS-b0
b10
b10
b10
b10
10
3.1.1 Host Interface Map (Read Only Registers)
INT_PROG
b9
b9
b9
b9
9
STD_
LOCK
b8
b8
b8
b8
8
b7
b7
b7
b7
7
b6
b6
b6
b6
6
b5
b5
b5
b5
5
b4
b4
b4
b4
4
b3
b3
b3
b3
3
b2
b2
b2
b2
2
b1
b1
b1
b1
1
20 of 50
b0
b0
b0
b0
0
GS1531 Data Sheet
IOPROC_DISABLE
EDH_FLAG
VIDEO_FORMAT_B
VIDEO_FORMAT_A
FF_LINE_END_F1
FF_LINE_START_F1
FF_LINE_END_F0
FF_LINE_START_F0
AP_LINE_END_F1
AP_LINE_START_F1
AP_LINE_END_F0
AP_LINE_START_F0
REGISTER NAME
LINE_352M_f2
LINE_352M_f1
ADDRESS
1Ch
1Bh
1Ah
19h
18h
17h
16h
15h
14h
13h
12h
11h
10h
0Fh
0Eh
0Dh
0Ch
0Bh
0Ah
09h
08h
07h
06h
05h
04h
03h
02h
01h
00h
VF4-b7
VF2-b7
15
ANC-IDA
VF4-b5
VF2-b5
13
30573 - 7
ANC-UES
VF4-b6
VF2-b6
14
ANC-EDA
VF4-b3
VF2-b3
11
February 2008
ANC-IDH
VF4-b4
VF2-b4
12
ANC-EDH
VF4-b2
VF2-b2
10
b10
b10
FF-UES
VF4-b1
VF2-b1
b9
b9
b9
b9
b9
b9
b9
b9
9
b9
b9
3.1.2 Host Interface Map (R/W Configurable Registers)
H_CONFIG
FF-IDA
VF4-b0
VF2-b0
b8
b8
b8
b8
b8
b8
b8
b8
8
b8
b8
FF-IDH
VF3-b7
VF1-b7
b7
b7
b7
b7
b7
b7
b7
b7
7
b7
b7
352M_INS
FF-EDA
VF3-b6
VF1-b6
b6
b6
b6
b6
b6
b6
b6
b6
6
b6
b6
ILLEGAL_RE
MAP
FF-EDH
VF3-b5
VF1-b5
b5
b5
b5
b5
b5
b5
b5
b5
5
b5
b5
EDH_CRC_IN
S
AP-UES
VF3-b4
VF1-b4
b4
b4
b4
b4
b4
b4
b4
b4
4
b4
b4
ANC_
CSUM_INS
AP-IDA
VF3-b3
VF1-b3
b3
b3
b3
b3
b3
b3
b3
b3
3
b3
b3
CRC_INS
AP-IDH
VF3-b2
VF1-b2
b2
b2
b2
b2
b2
b2
b2
b2
2
b2
b2
TRS_INS
AP-EDH
VF3-b0
VF1-b0
b0
b0
b0
b0
b0
b0
b0
b0
0
b0
b0
21 of 50
LNUM_ INS
AP-EDA
VF3-b1
VF1-b1
b1
b1
b1
b1
b1
b1
b1
b1
1
b1
b1
GS1531 Data Sheet
GS1531 Data Sheet
4. Detailed Description
4.1 Functional Overview
The GS1531 is a multi-rate serializer with an integrated cable driver. When used in
conjunction with the external GO1555/GO1525* Voltage Controlled Oscillator, a
transmit solution at 1.485Gb/s, 1.485/1.001Gb/s or 270Mb/s is realized.
The device has three different modes of operation which must be set through
external device pins.
When SMPTE mode is enabled, the device will accept 10-bit multiplexed or 20-bit
demultiplexed SMPTE compliant data at both HD and SD signal rates. The
device’s additional processing features are also enabled in this mode.
In DVB-ASI mode, the GS1531 will accept an 8-bit parallel DVB-ASI compliant
transport stream on its upper input bus. The serial output data stream will be
8b/10b encoded and stuffed.
The GS1531’s third mode allows for the serializing of data not conforming to
SMPTE or DVB-ASI streams.
The provided serial digital outputs feature a high impedance mode, output mute on
loss of parallel clock and adjustable signal swing. The output slew rate is
automatically controlled by the SD/HD setting.
In the digital signal processing core, several data processing functions are
implemented including SMPTE 352M and EDH data packet generation and
insertion, and automatic video standards detection. These features are all enabled
by default, but may be individually disabled via internal registers accessible
through the GSPI host interface.
Finally, the GS1531 contains a JTAG interface for boundary scan test
implementations.
*For new designs use GO1555
4.2 Parallel Data Inputs
Data inputs enter the device on the rising edge of PCLK as shown in Figure 4-1.
The input data format is defined by the setting of the external SD/HD,
SMPTE_BYPASS and DVB_ASI pins and may be presented in 10-bit or 20-bit
format. The input data bus width is controlled independently from the internal data
bus width by the 20bit/10bit input pin.
30573 - 7
February 2008
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GS1531 Data Sheet
PCLK
DIN[19:0]
DATA
Control signal
input
tSU
tIH
Figure 4-1: PCLK to Data Timing
4.2.1 Parallel Input in SMPTE Mode
When the device is operating in SMPTE mode, see SMPTE Mode on page 25, both
SD and HD data may be presented to the input bus in either multiplexed or
demultiplexed form depending on the setting of the 20bit/10bit input pin.
In 20-bit mode, (20bit/10bit = HIGH), the input data format should be word aligned,
demultiplexed luma and chroma data. Luma words should be presented to
DIN[19:10] while chroma words should occupy DIN[9:0].
In 10-bit mode, (20bit/10bit = LOW), the input data format should be word aligned,
multiplexed luma and chroma data. The data should be presented to DIN[19:10].
DIN[9:0] will be high impedance in this mode.
4.2.2 Parallel Input in DVB-ASI Mode
When operating in DVB-ASI mode, see DVB-ASI mode on page 26, the GS1531
requires the input data bus to be configured for 10-bit operation (20bit/10bit =
LOW).
The device accepts 8-bit data words on DIN[17:10] such that DIN17 = HIN is the
most significant bit of the encoded transport stream data and DIN10 = AIN is the
least significant bit.
In addition, DIN19 and DIN18 are configured as the DVB-ASI control signals
INSSYNCIN and KIN respectively. See DVB-ASI mode on page 26 for a
description of these DVB-ASI specific input signals.
The pins DIN[9:0] are high impedance when the GS1531 is operating in DVB-ASI
mode.
4.2.3 Parallel Input in Data-Through Mode
When operating in Data-Through mode, see Data-Through Mode on page 28, the
GS1531 passes data presented to the parallel input bus to the serial output without
performing any encoding or scrambling.
The input data bus width accepted by the device in this mode is controlled by the
setting of the 20bit/10bit pin.
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February 2008
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GS1531 Data Sheet
4.2.4 Parallel Input Clock (PCLK)
The frequency of the PCLK input signal required by the GS1531 is determined by
the input data format. Table 4-1 below lists the possible input signal formats and
their corresponding parallel clock rates.
NOTE: DVB-ASI input requires a 10-bit wide input data bus (20bit/10bit = LOW).
Table 4-1: Parallel Data Input Format
Control Signals
Input Data Format
DIN
[19:10]
DIN [9:0]
PCLK
20bit/
10bit
SD/
HD
SMPTE_BYPASS
DVB_ASI
20bit DEMULTIPLEXED SD
LUMA
CHROMA
13.5MHz
HIGH
HIGH
HIGH
LOW
10bit MULTIPLEXED SD
LUMA /
CHROMA
HIGH
IMPEDANCE
27MHz
LOW
HIGH
HIGH
LOW
20bit DEMULTIPLEXED HD
LUMA
CHROMA
74.25 or
HIGH
LOW
HIGH
LOW
LOW
LOW
HIGH
LOW
LOW
HIGH
LOW
HIGH
LOW
HIGH
LOW
HIGH
SMPTE MODE
74.25/
1.001MHz
10bit MULTIPLEXED HD
LUMA /
CHROMA
HIGH
IMPEDANCE
148.5 or
DVB-ASI
HIGH
IMPEDANCE
27MHz
DATA
20bit DEMULTIPLEXED SD
DATA
DATA
13.5MHz
HIGH
HIGH
LOW
LOW
10bit MULTIPLEXED SD
DATA
HIGH
IMPEDANCE
27MHz
LOW
HIGH
LOW
LOW
20bit DEMULTIPLEXED HD
DATA
DATA
74.25 or
HIGH
LOW
LOW
LOW
LOW
LOW
LOW
LOW
148.5/
1.001MHz
DVB-ASI MODE
10bit DVB-ASI
DATA-THROUGH MODE
74.25/
1.001MHz
10bit MULTIPLEXED HD
DATA
HIGH
IMPEDANCE
30573 - 7
148.5 or
148.5/
1.001MHz
February 2008
24 of 50
GS1531 Data Sheet
4.3 SMPTE Mode
The GS1531 is said to be in SMPTE mode when the SMPTE_BYPASS pin is set
HIGH and the DVB_ASI pin is set LOW.
In this mode, the parallel data will be scrambled according to SMPTE 259M or
292M, and NRZ-to-NRZI encoded prior to serialization.
4.3.1 Internal Flywheel
The GS1531 has an internal flywheel which is used in the generation of internal /
external timing signals, and in automatic video standards detection. It is
operational in SMPTE mode only.
The flywheel consists of a number of counters and comparators operating at video
pixel and video line rates. These counters maintain information about the total line
length, active line length, total number of lines per field / frame and total active lines
per field / frame for the received video standard.
When DETECT_TRS is LOW, the flywheel will be locked to the externally supplied
H, V, and F timing signals.
When DETECT_TRS is HIGH, the flywheel will be locked to the embedded TRS
signals in the parallel input data. Both 8-bit and 10-bit TRS code words will be
identified by the device.
The flywheel 'learns' the video standard by timing the horizontal and vertical
reference information supplied a the H, V, and F input pins, or contained in the TRS
ID words of the received video data. Full synchronization of the flywheel to the
received video standard therefore requires one complete video frame.
Once synchronization has been achieved, the flywheel will continue to monitor the
received TRS timing or the supplied H, V, and F timing information to maintain
synchronization.
4.3.2 HVF Timing Signal Extraction
As discussed above, the GS1531's internal flywheel may be locked to externally
provided H, V, and F signals when DETECT_TRS is set LOW.
The H signal timing should also be configured via the H_CONFIG bit of the internal
IOPROC_DISABLE register as either active line based blanking or TRS based
blanking, see Packet Generation and Insertion on page 30.
Active line based blanking is enabled when the H_CONFIG bit is set LOW. In this
mode, the H input should be HIGH for the entire horizontal blanking period,
including the EAV and SAV TRS words. This is the default H timing assumed by
the device.
When H_CONFIG is set HIGH, TRS based blanking is enabled. In this case, the H
input should be set HIGH for the entire horizontal blanking period as indicated by
the H bit in the associated TRS words.
The timing of these signals is shown in Figure 4-2.
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GS1531 Data Sheet
PCLK
LUMA DATA OUT
3FF
000
000
XYZ
(eav)
3FF
000
000
XYZ
(sav)
CHROMA DATA OUT
3FF
000
000
XYZ
(eav)
3FF
000
000
XYZ
(sav)
H
V
F
H:V:F TIMING - HD 20-BIT INPUT MODE
PCLK
MULTIPLEXED
Y/Cr/Cb DATA OUT
3FF
3FF
000
000
000
XYZ
(eav)
XYZ
(eav)
000
XYZ
(sav)
XYZ
(sav)
000
H
V
F
H:V:F TIMING AT EAV - HD 10-BIT INPUT MODE
PCLK
MULTIPLEXED
Y/Cr/Cb DATA OUT
3FF
3FF
000
000
000
H
V
F
H;V:F TIMING AT SAV - HD 10-BIT INPUT MODE
PCLK
CHROMA DATA OUT
3FF
000
3FF
000
LUMA DATA OUT
000
XYZ
(eav)
000
XYZ
(SAV)
H
V
H SIGNAL TIMING:
H_CONFIG = LOW
F
H_CONFIG = HIGH
H:V:F TIMING - SD 20-BIT INPUT MODE
PCLK
MULTIPLEXED
Y/Cr/Cb DATA OUT
3FF
000
000
XYZ
(eav)
3FF
000
000
XYZ
(sav)
H
V
F
H:V:F TIMING - SD 10-BIT INPUT MODE
Figure 4-2: H, V, F Timing
4.4 DVB-ASI mode
To operate the GS1531 in DVB-ASI mode, set the SMPTE_BYPASS and
20bit/10bit pins LOW, and the DVB_ASI and SD/HD pins HIGH.
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GS1531 Data Sheet
4.4.1 Control Signal Inputs
In DVB-ASI mode, the DIN19 and DIN18 pins will be configured as DVB-ASI
control signals INSSYNCIN and KIN respectively.
When INSSYNCIN is set HIGH, the device will insert K28.5 sync characters into
the data stream. This function is used to assist system implementations where the
GS1531 may be preceded by an external data FIFO. Parallel DVB-ASI data may
be clocked into the FIFO at some rate less than 27MHz. The INSSYNCIN input
may then be connected to the FIFO empty signal, thus providing a means of
padding up the data transmission rate to 27MHz. See Figure 4-3.
NOTE: 8b/10b encoding will take place after K28.5 sync character insertion.
KIN should be set HIGH whenever the parallel data input is to be interpreted as any
special character defined by the DVB-ASI standard (including the K28.5 sync
character). This pin should be set LOW when the input is to be interpreted as data.
NOTE: When operating in DVB-ASI mode, DIN[9:0] become high impedance.
AIN ~ HIN
SDO
TS
8
8
FIFO
GS1531
KIN
KIN
WRITE_CLK
<27MHz
READ CLK
=27MHz
SDO
CLK_IN
FE
INSSYNCIN
CLK_OUT
PCLK = 27MHz
Figure 4-3: DVB-ASI FIFO Implementation using the GS1531
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GS1531 Data Sheet
4.5 Data-Through Mode
The GS1531 may be configured to operate as a simple parallel-to-serial converter.
In this mode, the device presents data to the output buffer without performing any
scrambling or encoding.
Data-through mode is enabled only when both the SMPTE_BYPASS and
DVB_ASI pins are set LOW.
4.6 Additional Processing Functions
The GS1531 contains an additional data processing block which is available in
SMPTE mode only, see SMPTE Mode on page 25.
4.6.1 Input Data Blank
The video input data may be 'blanked' by the GS1531. In this mode, all input video
data except TRS words are set to the appropriate blanking levels by the device.
Both the horizontal and vertical ancillary data spaces will also be set to blanking
levels.
This function is enabled by setting the BLANK pin LOW.
4.6.2 Automatic Video Standard Detection
The GS1531 can detect the input video standard by using the timing parameters
extracted from the received TRS ID words or supplied H, V, and F timing signals,
see Internal Flywheel on page 25. This information is presented to the host
interface via the VIDEO_STANDARD register (Table 4-2).
Total samples per line, active samples per line, total lines per field/frame and active
lines per field/frame are also calculated and presented to the host interface via the
RASTER_STRUCTURE registers (Table 4-3). These line and sample count
registers are updated once per frame at the end of line 12. This is in addition to the
information contained in the VIDEO_STANDARD register.
After device reset, the four RASTER_STRUCTURE registers default to zero.
Table 4-2: Host Interface Description for Video Standard Register
Register Name
Bit
Name
Description
R/W
Default
VIDEO_STANDARD
Address: 004h
15
–
Not Used.
–
–
14-10
VD_STD[4:0]
Video Data Standard (see Table 4-4).
R
0
9
INT_PROG
Interlace/Progressive: Set LOW if detected video
standard is PROGRESSIVE and is set HIGH if it is
INTERLACED.
R
0
8
STD_LOCK
Standard Lock: Set HIGH when flywheel has
achieved full synchronization.
R
0
7-0
–
Not Used.
–
–
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GS1531 Data Sheet
Table 4-3: Host Interface Description for Raster Structure Registers
Register Name
Bit
Name
Description
R/W
Default
RASTER_STRUCTURE1
Address: 00Eh
15-12
–
Not Used.
–
–
11-0
RASTER_STRUCTURE_1[11:0]
Words Per Active Line
R
0
RASTER_STRUCTURE2
Address: 00Fh
15-13
–
Not Used.
–
–
12-0
RASTER_STRUCTURE_2[12:0]
Words Per Total Line.
R
0
RASTER_STRUCTURE3
Address: 010h
15-11
–
Not Used.
–
–
10-0
RASTER_STRUCTURE_3[10:0]
Total Lines Per Frame
R
0
RASTER_STRUCTURE4
Address: 011h
15-11
–
Not Used.
–
–
10-0
RASTER_STRUCTURE_4[10:0]
Active Lines Per Field
R
0
4.6.2.1 Video Standard Indication
The video standard codes reported in the VD_STD[4:0] bits of the
VIDEO_STANDARD register represent the SMPTE standards as shown in
Table 4-4.
In addition to the 5-bit video standard code word, the VIDEO_STANDARD register
also contains two status bits. The STD_LOCK bit will be set HIGH whenever the
flywheel has achieved full synchronization. The INT_PROG bit will be set LOW if
the detected video standard is progressive and HIGH if the detected video
standard is interlaced.
The VD_STD[4:0], STD_LOCK and INT_PROG bits of the VIDEO_STANDARD
register will default to zero after device reset. The VD_STD[4:0] and INT_PROG
bits will also default to zero if the SMPTE_BYPASS pin is asserted LOW or if the
LOCKED output is LOW. The STD_LOCK bit will retain its previous value if the
PCLK is removed.
Table 4-4: Supported Video Standards
VD_STD[4:0]
SMPTE
Standard
Video Format
Length of
HANC
Length of
Active Video
Total
Samples
SMPTE352M
Lines
00h
296M (HD)
1280x720/60 (1:1)
358
1280
1650
10
01h
296M (HD)
1280x720/60 (1:1) - EM
198
1440
1650
10
02h
296M (HD)
1280x720/30 (1:1)
2008
1280
3300
10
03h
296M (HD)
1280x720/30 (1:1) - EM
408
2880
3300
10
04h
296M (HD)
1280x720/50 (1:1)
688
1280
1980
10
05h
296M (HD)
1280x720/50 (1:1) - EM
240
1728
1980
10
06h
296M (HD)
1280x720/25 (1:1)
2668
1280
3960
10
07h
296M (HD)
1280x720/25 (1:1) - EM
492
3456
3960
10
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GS1531 Data Sheet
Table 4-4: Supported Video Standards (Continued)
VD_STD[4:0]
SMPTE
Standard
Video Format
Length of
HANC
Length of
Active Video
Total
Samples
SMPTE352M
Lines
08h
296M (HD)
1280x720/24 (1:1)
2833
1280
4125
10
09h
296M (HD)
1280x720/24 (1:1) - EM
513
3600
4125
10
0Ah
274M (HD)
1920x1080/60 (2:1) or
1920x1080/30 (PsF)
268
1920
2200
10, 572
0Bh
274M (HD)
1920x1080/30 (1:1)
268
1920
2200
18
0Ch
274M (HD)
1920x1080/50 (2:1) or
708
1920
2640
10, 572
1920x1080/25 (PsF)
0Dh
274M (HD)
1920x1080/25 (1:1)
708
1920
2640
18
0Eh
274M (HD)
1920x1080/25 (1:1) - EM
324
2304
2640
18
0Fh
274M (HD)
1920x1080/25 (PsF) - EM
324
2304
2640
10, 572
10h
274M (HD)
1920x1080/24 (1:1)
818
1920
2750
18
11h
274M (HD)
1920x1080/24 (PsF)
818
1920
2750
10, 572
12h
274M (HD)
1920x1080/24 (1:1) - EM
338
2400
2750
18
13h
274M (HD)
1920x1080/24 (PsF) - EM
338
2400
2750
10, 572
14h
295M (HD)
1920x1080/50 (2:1)
444
1920
2376
10, 572
15h
260M (HD)
1920x1035/60 (2:1)
268
1920
2200
10, 572
16h
125M (SD)
1440x487/60 (2:1)
268
1440
1716
10, 276
268
1440
1716
10, 276
(Or dual link progressive)
17h
125M (SD)
1440x507/60 (2:1)
19h
125M (SD)
525-line 487 generic
–
–
1716
10, 276
1Bh
125M (SD)
525-line 507 generic
–
–
1716
10, 276
18h
ITU-R BT.656
1440x576/50 (2:1)
280
1440
1728
9, 322
(SD)
(Or dual link progressive)
ITU-R BT.656
625-line generic (EM)
–
–
1728
9, 322
1Ah
(SD)
1Dh
Unknown HD
–
–
–
–
–
1Eh
Unknown SD
–
–
–
–
–
1Ch, 1Fh
Reserved
–
–
–
–
–
NOTE: Though the GS1531 will work correctly on and serialize both 59.94Hz and 60Hz formats, it will not distinguish between them.
4.6.3 Packet Generation and Insertion
In addition to input data blanking and automatic video standards detection, the
GS1531 may also calculate, assemble and insert into the data stream various
types of ancillary data packets and TRS ID words.
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GS1531 Data Sheet
These features are only available when the device is set to operated in SMPTE
mode and the IOPROC_EN/DIS pin is set HIGH. Individual insertion features may
be enabled or disabled via the IOPROC_DISABLE register (Table 4-5).
All of the IOPROC_DISABLE register bits default to '0' after device reset, enabling
all of the processing features. To disable any individual error correction feature, the
host interface must set the corresponding bit HIGH in this register.
Table 4-5: Host Interface Description for Internal Processing Disable Register
Register Name
Bit
Name
Description
R/W
Default
IOPROC_DISABLE
Address: 000h
15-9
–
Not Used.
–
–
8
H_CONFIG
Horizontal sync timing input configuration. Set LOW
when the H input timing is based on active line
blanking (default). Set HIGH when the H input
timing is based on the H bit of the TRS words. See
Figure 4-2.
R/W
0
7
–
Not Used.
–
–
6
352M_INS
SMPTE352M packet insertion. In HD mode, 352M
packets are inserted in the Y channel only when one
of the bytes in the VIDEO_FORMAT_A or
VIDEO_FORMAT_B registers are programmed with
non-zero values. The IOPROC_EN/DIS pin and
SMPTE_BYPASS pin must also be set HIGH. Set
HIGH to disable.
R/W
0
5
ILLEGAL_REMAP
Illegal Code Remapping. Detection and correction
of illegal code words within the active picture area
(AP). The IOPROC_EN/DIS pin and
SMPTE_BYPASS pin must also be set HIGH. Set
HIGH to disable.
R/W
0
4
EDH_CRC_INS
Error Detection & Handling (EDH) Cyclical
Redundancy Check (CRC) error correction. In SD
mode the GS1531 will generate and insert EDH
packets. The IOPROC_EN/DIS pin and
SMPTE_BYPASS pin must also be set HIGH. Set
HIGH to disable.
R/W
0
3
ANC_CSUM_INS
Ancillary Data Checksum insertion. The
IOPROC_EN/DIS pin and SMPTE_BYPASS pin
must also be set HIGH. Set HIGH to disable.
R/W
0
2
CRC_INS
Y and C line-based CRC insertion. In HD mode,
line-based CRC words are inserted in both the Y
and C channels. The IOPROC_EN/DIS pin and
SMPTE_BYPASS pin must be also set HIGH. Set
HIGH to disable
R/W
0
1
LNUM_INS
Y and C line number insertion - HD mode only. The
IOPROC_EN/DIS pin and SMPTE_BYPASS pin
must be set HIGH. Set HIGH to disable.
R/W
0
0
TRS_INS
Timing Reference Signal Insertion. Occurs only
when IOPROC_EN/DIS is HIGH and
SMPTE_BYPASS is HIGH. Set HIGH to disable.
R/W
0
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GS1531 Data Sheet
4.6.3.1 SMPTE 352M Payload Identifier Insertion
The GS1531 can generate and insert SMPTE 352M payload identifier ancillary
data packets into the data stream, based on information programmed into the host
interface.
When this feature is enabled, the device will automatically generate the ancillary
data preambles, (DID, SDID, DBN, DC), and calculate the checksum. The SMPTE
352M packet will be inserted into the data stream according to the line numbers
programmed in the LINE_352M registers (Table 4-6).
The insertion process will only take place if one or more of the four
VIDEO_FORMAT registers (Table 4-7) have been programmed with non-zero
values. In addition, the GS1531 requires the 352M_INS bit of the
IOPROC_DISABLE register be set LOW.
NOTE 1: For the purpose of determining the line and pixel position for insertion, the
GS1531 will differentiate between PsF and interlaced formats by interrogating bits
14 and 15 of the VIDEO_FORMAT_A register.
The packets will be inserted immediately after the EAV word in SD video streams
and immediately after the line-based CRC word in the Y channel of HD video
streams.
NOTE 2: It is the responsibility of the user to ensure that there is sufficient space
in the horizontal blanking interval for the insertion of the SMPTE 352M packets.
If there are other ancillary data packets present, the SMPTE 352M packet will be
inserted in the first available location in the horizontal ancillary space. Ancillary
data must be adjacent to the EAV in SD streams or to the line based-CRC in HD
streams. Where there is insufficient space available, the 352M packets will not be
inserted.
Table 4-6: Host Interface Description for SMPTE 352M Packet Line Number Insertion Registers
Register Name
Bit
Name
Description
LINE_352M_f1
Address: 01Bh
15-11
–
Not Used.
10-0
LINE_0_352M[10:0]
Line number where SMPTE352M packet is inserted
in field 1.
LINE_352M_f2
Address: 01Ch
15-11
–
Not Used.
10-0
LINE_1_352M[10:0]
Line number where SMPTE352M packet is inserted
in field 2.
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R/W
Default
–
–
R/W
0
–
–
R/W
0
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GS1531 Data Sheet
Table 4-7: Host Interface Description for SMPTE 352M Payload Identifier Registers
Register Name
Bit
Name
Description
VIDEO_FORMAT_B
Address: 00Bh
15-8
SMPTE352M
Byte 4
7-0
SMPTE352M
Byte 3
VIDEO_FORMAT_A
Address: 00Ah
15-8
SMPTE352M
Byte 2
7-0
SMPTE 352M
Byte 1
R/W
Default
SMPTE 352M Byte 4 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
SMPTE 352M Byte 3 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
SMPTE 352M Byte 2 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
SMPTE 352M Byte 1 information must be
programmed in this register when 352M_INS =
LOW.
R/W
0
4.6.3.2 Illegal Code Remapping
If the ILLEGAL_REMAP bit of the IOPROC_DISABLE register is set LOW, the
GS1531 will remap all codes within the active picture between the values of 3FCh
and 3FFh to 3FBh. All codes within the active picture area between the values of
000h and 003h will be remapped to 004h.
In addition, 8-bit TRS and ancillary data preambles will be remapped to 10-bit
values if this feature is enabled.
4.6.3.3 EDH Generation and Insertion
When operating in SD mode, (SD/HD = HIGH), the GS1531 will generate and
insert complete EDH packets into the data stream. Packet generation and insertion
will only take place if the EDH_CRC_INS bit of the IOPROC_DISABLE register is
set LOW.
The GS1531 will generate all of the required EDH packet data including all ancillary
data preambles, (DID, DBN, DC), reserved code words and checksum. Calculation
of both full field (FF) and active picture (AP) CRC's will be carried out by the device.
SMPTE RP165 specifies the calculation ranges and scope of EDH data for
standard 525 and 625 component digital interfaces. The GS1531 will utilize these
standard ranges by default.
If the received video format does not correspond to 525 or 625 digital component
video standards as determined by the flywheel pixel and line counters, then one of
two schemes for determining the EDH calculation ranges will be employed:
1. Ranges will be based on the line and pixel ranges programmed by the host
interface; or
2. In the absence of user-programmed calculation ranges, ranges will be
determined from the received TRS ID words or supplied H, V, and F timing
signals, see Internal Flywheel on page 25.
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GS1531 Data Sheet
The registers available to the host interface for programming EDH calculation
ranges include active picture and full field line start and end positions for both
fields. Table 4-8 shows the relevant registers, which default to '0' after device reset.
If any or all of these register values are zero, then the EDH CRC calculation ranges
will be determined from the flywheel generated H signal. The first active and full
field pixel will always be the first pixel after the SAV TRS code word. The last active
and full field pixel will always be the last pixel before the start of the EAV TRS code
words.
EDH error flags (EDH, EDA, IDH, IDA and UES) for ancillary data, full field and
active picture will also be inserted. These flags must be programmed into the
EDH_FLAG registers of the device (Table 4-9).
NOTE 1: It is the responsibility of the user to ensure that the EDH flag registers are
updated once per field.
The prepared EDH packet will be inserted at the appropriate line of the video
stream according to RP165. The start pixel position of the inserted packet will be
based on the SAV position of that line such that the last byte of the EDH packet
(the checksum) will be placed in the sample immediately preceding the start of the
SAV TRS word.
NOTE 2: It is also the responsibility of the user to ensure that there is sufficient
space in the horizontal blanking interval for the EDH packet to be inserted.
Table 4-8: Host Interface Description for EDH Calculation Range Registers
Register Name
Bit
Name
Description
AP_LINE_START_F0
Address: 012h
15-10
–
Not Used.
9-0
AP_LINE_START_F0[9:0]
Field 0 Active Picture start line data used to set
EDH calculation range outside of RP 165
values.
AP_LINE_END_F0
Address: 013h
15-10
–
Not Used.
9-0
AP_LINE_END_F0[9:0]
Field 0 Active Picture end line data used to set
EDH calculation range outside of RP 165
values.
AP_LINE_START_F1
Address: 014h
15-10
–
Not Used.
9-0
AP_LINE_START_F1[9:0]
Field 1 Active Picture start line data used to set
EDH calculation range outside of RP 165
values.
AP_LINE_END_F1
Address: 015h
15-10
–
Not Used.
9-0
AP_LINE_END_F1[9:0]
Field 1 Active Picture end line data used to set
EDH calculation range outside of RP 165
values.
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R/W
Default
–
–
R/W
0
–
–
R/W
0
–
–
R/W
0
–
–
R/W
0
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GS1531 Data Sheet
Table 4-8: Host Interface Description for EDH Calculation Range Registers (Continued)
Register Name
Bit
Name
Description
FF_LINE_START_F0
Address: 016h
15-10
–
Not Used.
9-0
FF_LINE_START_F0[9:0]
Field 0 Full Field start line data used to set EDH
calculation range outside of RP 165 values.
FF_LINE_END_F0
Address: 017h
15-10
–
Not Used.
9-0
FF_LINE_END_F0[9:0]
Field 0 Full Field end line data used to set EDH
calculation range outside of RP 165 values.
FF_LINE_START_F1
Address: 018h
15-10
–
Not Used.
9-0
FF_LINE_START_F1[9:0]
Field 1 Full Field start line data used to set EDH
calculation range outside of RP-165 values.
FF_LINE_END_F1
Address: 019h
15-10
–
Not Used.
9-0
FF_LINE_END_F1[9:0]
Field 1 Full Field end line data used to set EDH
calculation range outside of RP-165 values.
R/W
Default
–
–
R/W
0
–
–
R/W
0
–
–
R/W
0
–
–
R/W
0
R/W
Default
–
–
Table 4-9: Host Interface Description for EDH Flag Register
Register Name
Bit
Name
Description
EDH_FLAG
Address: 002h
15
–
Not Used.
14
ANC-UES
Ancillary Unknown Error Status flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
13
ANC-IDA
Ancillary Internal device error Detected Already
flag will be generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
12
ANC-IDH
Ancillary Internal device error Detected Here
flag will be generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
11
ANC-EDA
Ancillary Error Detected Already flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
10
ANC-EDH
Ancillary Error Detected Here flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
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GS1531 Data Sheet
Table 4-9: Host Interface Description for EDH Flag Register (Continued)
Register Name
Bit
Name
Description
R/W
Default
9
FF-UES
Full Field Unknown Error flag will be generated
and inserted when IOPROC_EN/DIS and
SMPTE_BYPASS pins are HIGH and
EDH_CRC_INS bit is LOW. SD mode only.
R/W
0
8
FF-IDA
Full Field Internal device error Detected
Already flag will be generated and inserted
when IOPROC_EN/DIS and SMPTE_BYPASS
pins are HIGH and EDH_CRC_INS bit is LOW.
SD mode only.
R/W
0
7
FF-IDH
Full Field Internal device error Detected flag will
be generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
6
FF-EDA
Full Field Error Detected Already flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
5
FF-EDH
Full Field Error Detected Here flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
4
AP-UES
Active Picture Unknown Error Status flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
3
AP-IDA
Active Picture Internal device error Detected
Already flag will be generated and inserted
when IOPROC_EN/DIS and SMPTE_BYPASS
pins are HIGH and EDH_CRC_INS bit is LOW.
SD mode only.
R/W
0
2
AP-IDH
Active Picture Internal device error Detected
Here flag will be generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
1
AP-EDA
Active Picture Error Detected Already flag will
be generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
0
AP-EDH
Active Picture Error Detected Here flag will be
generated and inserted when
IOPROC_EN/DIS and SMPTE_BYPASS pins
are HIGH and EDH_CRC_INS bit is LOW. SD
mode only.
R/W
0
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GS1531 Data Sheet
4.6.3.4 Ancillary Data Checksum Generation and Insertion
The GS1531 will calculate checksums for all detected ancillary data packets
presented to the device. These calculated checksum values are inserted into the
data stream prior to serialization.
Ancillary data checksum generation and insertion will only take place if the
ANC_CSUM_INS bit of the IOPROC_DISABLE register is set LOW.
4.6.3.5 Line Based CRC Generation and Insertion
The GS1531 will generate and insert line based CRC words into both the Y and C
channels of the data stream. This feature is only available in HD mode and is
enabled by setting the CRC_INS bit of the IOPROC_DISABLE register LOW.
4.6.3.6 HD Line Number Generation and Insertion
In HD mode, the GS1531 will calculate and insert line numbers into the Y and C
channels of the output data stream.
Line number generation is in accordance with the relevant HD video standard as
determined by the device, see Automatic Video Standard Detection on page 28.
This feature is enabled when SD/HD = LOW, and the LNUM_INS bit of the
IOPROC_DISABLE register is set LOW.
4.6.3.7 TRS Generation and Insertion
The GS1531 can generate and insert 10-bit TRS code words into the data stream
as required. This feature is enabled by setting the TRS_INS bit of the
IOPROC_DISABLE register LOW.
TRS word generation will be performed in accordance with the timing parameters
generated by the flywheel which will be locked either to the received TRS ID words
or the supplied H, V, and F timing signals, see Internal Flywheel on page 25.
4.7 Parallel-To-Serial Conversion
The parallel data output of the internal data processing blocks is fed to the
parallel-to-serial converter. The function of this block is to generate a serial data
stream from the 10-bit or 20-bit parallel data words and pass the stream to the
integrated cable driver.
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GS1531 Data Sheet
4.8 Serial Digital Data PLL
To obtain a clean clock signal for serialization and transmission, the input PCLK is
locked to an external reference signal via the GS1531's integrated phase-locked
loop. This high quality analog PLL allows the GS1531 to significantly attenuate jitter
on the incoming PCLK. This PLL is also responsible for generating all internal clock
signals required by the device.
Internal division ratios for the locked PCLK are determined by the setting of the
SD/HD and 20bit/10bit pins as shown in Table 4-10.
Table 4-10: Serial Digital Output Rates
Supplied PCLK Rate
Serial Digital
Output Rate
Pin Settings
SD/HD
20bit/10bit
74.25 or
74.25/1.001 MHz
1.485 or
1.485/1.001Gb/s
LOW
HIGH
148.5 or
148.5/1.001MHz
1.485 or
1.485/1.001Gb/s
LOW
LOW
13.5MHz
270Mb/s
HIGH
HIGH
27MHz
270Mb/s
HIGH
LOW
4.8.1 External VCO
The GS1531 requires the GO1555/GO1525* external voltage controlled oscillator
as part of its internal PLL.
Power for the external VCO is generated entirely by the GS1531 from an integrated
voltage regulator. The internal regulator uses +3.3V supplied on the CP_VDD /
CP_GND pins to provide +2.5V on the VCO_VCC / VCO_GND pins.
The external VCO produces a 1.485GHz reference signal for the PLL, input on the
VCO pin of the device. Both reference and control signals should be referenced to
the supplied VCO_GND as shown in the recommended application circuit of
Typical Application Circuit on page 46.
*For new designs use GO1555
4.8.2 Lock Detect Output
The lock detect block controls the serial digital output signal and indicates the lock
status of the device via the LOCKED output pin.
LOCKED will be asserted HIGH if and only if the internal data PLL has locked the
PCLK signal to the external VCO reference signal and one of the following is true:
1. The device is set to operate in SMPTE mode and has detected SMPTE TRS
words in the serial stream; or
2. The device is set to operate in DVB-ASI mode and has detected K28.5 sync
characters in the serial stream; or
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GS1531 Data Sheet
3. The device is set to operate in Data-Through mode.
4.8.3 Loop Bandwidth Adjustment
For new designs the GO1555 is recommended for use with the GS1531. The
recommended loop bandwidth control component values are listed in Table 4-11
and can be seen in Section 5.1 Typical Application Circuit.
Designs using the GO1525 VCO will require different loop bandwidth control
components. The component values are listed in Table 4-11.
Table 4-11: GO1555 Loop Bandwidth Adjustment
Component
GO1555
GO1525
LB_CONT
100nF
100nF
RLF-CP_CAP
33Ω
50Ω
CP_CAP
47nF
22nF
NOTE: When using the GS1531 with the GS4911B clock generator a narrower
loop bandwidth for the GS1531 serializer should be used. For more details please
refer to Section 2.5 of the GS4911B Reference Design.
4.9 Serial Digital Output
The GS1531 contains an integrated current mode differential serial digital cable
driver with automatic slew rate control.
The integrated cable driver uses a separate power supply of +1.8V DC supplied via
the CD_VDD and CD_GND pins.
To enable the output, SDO_EN/DIS must be set HIGH. Setting the SDO_EN/DIS
signal LOW will cause the SDO and SDO output pins to become high impedance,
resulting in reduced device power consumption.
Gennum recommends using the GS1528A SDI Dual Slew-Rate Cable Driver to
meet SMPTE specifications.
4.9.1 Output Swing
Nominally, the voltage swing of the serial digital output is 800mVp-p single-ended
into a 75Ω load. This is set externally by connecting the RSET pin to CD_VDD
through 281Ω .
The output swing may be decreased by increasing the value of the RSET resistor.
The relationship is approximated by the curve shown in Figure 4-4.
Alternatively, the serial digital output swing can drive 800mVp-p into a 50Ω load.
Since the output swing is reduced by a factor of approximately one third when the
smaller load is used, the RSET resistor must be 187Ω to obtain 800mVp-p.
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GS1531 Data Sheet
1000
ΔVSDO(mVp-p)
900
800
700
600
75Ω load
500
50Ω load
400
300
200 250 300 350 400 450 500 550 600 650 700
RSET(Ω)
Figure 4-4: Serial Digital Output Swing
4.9.2 Serial Digital Output Mute
The GS1531 will automatically mute the serial digital output when the LOCKED
output signal is LOW. In this case, the SDO and SDO signals are set to a constant
voltage level.
4.10 GSPI Host Interface
The GSPI, or Gennum Serial Peripheral Interface, is a 4-wire interface provided to
allow the host to enable additional features of the device and /or to provide
additional status information through configuration registers in the GS1531.
The GSPI comprises a serial data input signal SDIN, serial data output signal
SDOUT, an active low chip select CS, and a burst clock SCLK. The burst clock
must have a duty cycle between 40% and 60%.
Because these pins are shared with the JTAG interface port, an additional control
signal pin JTAG/HOST is provided. When JTAG/HOST is LOW, the GSPI interface
is enabled.
When operating in GSPI mode, the SCLK, SDIN, and CS signals are provided by
the host interface. The SDOUT pin is a high-impedance output allowing multiple
devices to be connected in parallel and selected via the CS input. The interface is
illustrated in the Figure 4-5 below.
All read or write access to the GS1531 is initiated and terminated by the host
processor. Each access always begins with a 16-bit command word on SDIN
indicating the address of the register of interest. This is followed by a 16-bit data
word on SDIN in write mode, or a 16-bit data word on SDOUT in read mode.
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GS1531 Data Sheet
Application Host
GS1531
SCLK
SCLK
SDOUT
SDIN
CS
SDIN
CS
SDOUT
Figure 4-5: Gennum Serial Peripheral Interface (GSPI)
4.10.1 Command Word Description
The command word is transmitted MSB first and contains a read/write bit, nine
reserved bits and a 6-bit register address. Set R/W = '1' to read and R/W = '0' to
write from the GSPI.
Command words are clocked into the GS1531 on the rising edge of the serial clock
SCLK. The appropriate chip select signal, CS, must be asserted low a minimum of
1.5ns (t0 in Figure 4-8 and Figure 4-9) before the first clock edge to ensure proper
operation.
Each command word must be followed by only one data word to ensure proper
operation.
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GS1531 Data Sheet
MSB
LSB
R/W
RSV
RSV
RSV
RSV
RSV
RSV
RSV
RSV
RSV
A5
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
Figure 4-6: Command Word
MSB
LSB
D15
D14
D13
D12
D11
D9
D10
D8
Figure 4-7: Data Word
4.10.2 Data Read and Write Timing
Read and write mode timing for the GSPI interface is shown in Figure 4-8 and
Figure 4-9 respectively. The maximum SCLK frequency allowed is 6.6MHz.
When writing to the registers via the GSPI, the MSB of the data word may be
presented to SDIN immediately following the falling edge of the LSB of the
command word. All SDIN data is sampled on the rising edge of SCLK.
When reading from the registers via the GSPI, the MSB of the data word will be
available on SDOUT 12ns (t5) following the falling edge of the LSB of the command
word, and thus may be read by the host on the very next rising edge of the clock.
The remaining bits are clocked out by the GS1531 on the negative edges of SCLK.
duty
cycle
t2
t0
t4
t5
period
SCLK
CS
t3
input data
setup time
RSV
RSV
t6
SDIN
R/W
RSV
RSV
RSV
RSV
RSV
RSV
RSV
A4
A5
A3
A2
A1
output data
hold time
A0
SDOUT
D15
D14
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D13
Figure 4-8: GSPI Read Mode Timing
t2
t0
duty
cycle
t4
period
SCLK
CS
SDIN
R/W
RSV
RSV
RSV
RSV
t3
input data
setup time
RSV
RSV
RSV
RSV
RSV
A5
A4
A3
A2
A1
A0
D15
D14
D13
Figure 4-9: GSPI Write Mode Timing
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GS1531 Data Sheet
4.10.3 Configuration and Status Registers
Table 4-12 summarizes the GS1531's internal status and configuration registers.
All of these registers are available to the host via the GSPI and are all individually
addressable.
Where status registers contain less than the full 16 bits of information however, two
or more registers may be combined at a single logical address.
Table 4-12: GS1531 Internal Registers
Address
Register Name
See Section
000h
IOPROC_DISABLE
Section 4.6.3
002h
EDH_FLAG
Section 4.6.3.3
004h
VIDEO_STANDARD
Section 4.6.2
00Ah - 00Bh
VIDEO_FORMAT
Section 4.6.3.1
00Eh - 011h
RASTER_STRUCTURE
Section 4.6.2
012h - 019h
EDH_CALC_RANGES
Section 4.6.3.3
01Bh - 01Ch
LINE_352M
Section 4.6.3.1
4.11 JTAG
When the JTAG/HOST input pin of the GS1531 is set HIGH, the host interface port
will be configured for JTAG test operation. In this mode, pins H4 to H6 and J6
become TMS, TCK, TDO, and TDI. In addition, the RESET_TRST pin will operate
as the test reset pin.
Boundary scan testing using the JTAG interface will be enabled in this mode.
There are two methods in which JTAG can be used on the GS1531:
1. As a stand-alone JTAG interface to be used at in-circuit ATE (Automatic Test
Equipment) during PCB assembly; or
2. Under control of the host for applications such as system power on self tests.
When the JTAG tests are applied by ATE, care must be taken to disable any other
devices driving the digital I/O pins. If the tests are to be applied only at ATE, this
can be accomplished with tri-state buffers used in conjunction with the
JTAG/HOST input signal. This is shown in Figure 4-10.
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GS1531 Data Sheet
Application HOST
GS1531
CS_TMS
SCLK_TCK
SDIN_TDI
SDOUT_TDO
JTAG_HOST
In-circuit ATE probe
Figure 4-10: In-Circuit JTAG
Alternatively, if the test capabilities are to be used in the system, the host may still
control the JTAG/HOST input signal, but some means for tri-stating the host must
exist in order to use the interface at ATE. This is represented in Figure 4-11.
Application HOST
GS1531
CS_TMS
SCLK_TCK
SDIN_TDI
SDOUT_TDO
JTAG_HOST
Tri-State
In-circuit ATE probe
Figure 4-11: System JTAG
Please contact your Gennum representative to obtain the BSDL model for the
GS1531.
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GS1531 Data Sheet
4.12 Device Power Up
The GS1531 has a recommended power supply sequence. To ensure correct
power up, power the CORE_VDD pins before the IO_VDD pins.
Device pins may also be driven prior to power up without causing damage.
To ensure that all internal registers are cleared upon power-up, the RESET_TRST
signal must be held LOW for a minimum of 1ms after the core power supply has
reached the minimum level specified in the DC Electrical Characteristics Table,
Table 2-1. See Figure 4-12.
4.13 Device Reset
In order to initialize all internal operating conditions to their default states the
RESET_TRST signal must be held LOW for a minimum of treset = 1ms.
When held in reset, all device outputs will be driven to a high-impedance state.
+1.65V
+1.8V
CORE_VDD
treset
treset
Reset
Reset
RESET_TRST
Figure 4-12: Reset Pulse
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GS1531 Data Sheet
5. Application Reference Design
5.1 Typical Application Circuit
+3.3V
GND_VCO
2
1
O/P
NC
VCC
GND
8
10n
GND_D
1u
+1.8V
+3.3V
GND_VCO
VCO_VCC
CORE_VDD
GND_VCO
10n
10n
7
VCTR
GND
1u
10n
IO_GND
VCO_VCC
GO1555
(GO1525)
5
GND_VCO
GND
6
4
GND
3
IO_VDD
IO_VDD
1u
10n
GND_VCO
CORE_GND
10n
IO_GND
GND_D
+3.3V
GND_D
GND_VCO
0
+1.8V
CP_VDD
* Component values for GO1555.
For GO1525 component values see Section 4.8.3
10n
1u
1u
+3.3V
33*
47n*
0
CORE_VDD
10n
IO_VDD
10n
0
CP_GND
CORE_GND
D o n o t p o p u l a t e R2
1u
10n
VCO_VCC
GND_VCO
IO_GND
R2
100n
GND_D
GND_A
GND_D
GND_VCO
PD_VDD
10n
CORE_GND
CORE_GND
CORE_VDD
CORE_VDD
IO_GND
IO_GND
IO_GND
IO_VDD
IO_VDD
IO_VDD
CP_VDD
CP_GND
PD_GND
PD_VDD
+1.8V
CORE_GND F5
CORE_GND E5
CORE_VDD F6
CORE_VDD E6
IO_GND B8
IO_GND F8
IO_GND J8
IO_VDD A8
IO_VDD E8
IO_VDD K8
B2
B3
C3
C2
C1
B4
B1
A1
A2
A3
A4
A5
PD_GND
SDO_EN/DIS
DETECT_TRS
JTAG/HOST
GND_A
20bit/10bit
J1
G1
H1
H2
SDO_EN/DIS
DETECT_TRS
281 +/-1%
+1.8V_A
SMPTE_BYPASS
SD/HD
DVB_ASI
SMPTE_BYPASS
SD/HD
DVB_ASI
NOTE: SMPTE_BYPASS, SD/HD, DVB_ASI, and RC_BYP
are INPUTS in slave mode (MASTER/SLAVE = LOW), and
are OUTPUTS in master mode (MASTER/SLAVE = HIGH).
SDIN_TDI
SDOUT_TDO
CS_TMS
10n
RESET_TRST
20bit/10bit
IOPROC_EN/DIS
SDO_EN/DIS
DETECT_TRS
JTAG/HOST
SMPTE_BYPASS
SD/HD
DVB_ASI
SCLK_TCK
SDIN_TDI
SDOUT_TDO
CS_TMS
D4
C6
C7
G6
F4
G4
J5
B7
K6
G5
E4
D5
H5
J6
H6
H4
RESET_TRST
20bit/10bit
IOPROC_EN/DIS
SDO_EN/DIS
DETECT_TRS
JTAG/HOST
SMPTE_BYPASS
SD/HD
DVB_ASI
SCLK_TCK
SDIN_TDI
SDOUT_TDO
CS_TMS
LOCKED
SCLK_TCK
A6
B5
B6
C4
C5
D2
D3
D7
E3
SCLK_TCK
GS1531
K1 RSET
JTAG/HOST
PCLK
BLANK
H
V
F
DATA[19..0]
A10
A9
B10
B9
C10
C9
D10
D9
E10
E9
F10
F9
G10
G9
H10
H9
J10
J9
K10
K9
D6
C8
D8
H7
A7
G8
H8
J7
K7
DATA19
DATA18
DATA17
DATA16
DATA15
DATA14
DATA13
DATA12
DATA11
DATA10
DATA9
DATA8
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
LOCK
PCLK
BLANK
H
V
F
E7
F2
F3
F7
G2
G3
G7
H3
J2
J3
J4
IOPROC_EN/DIS
RESET_TRST
IOPROC_EN/DIS
SDO
SDO
CD_GND
CD_VDD
20bit/10bit
DIN19
DIN18
DIN17
DIN16
DIN15
DIN14
DIN13
DIN12
DIN11
DIN10
DIN9
DIN8
DIN7
DIN6
DIN5
DIN4
DIN3
DIN2
DIN1
DIN0
RSV
K3
K4
K5
K2
RESET_TRST
F1
D1
E2
E1
LB_CONT
CP_CAP
LF
VCO_VCC
VCO_GND
VCO
VCO
CP_VDD
CP_GND
PD_GND
PD_VDD
GND_A
SDIN_TDI
SDOUT_TDO
CS_TMS
+1.8V_A
10n
+1.8V_A
10n
GND_A
50
50
GND_A
LOCK
To the GS1528A
Cable Driver
NOTE: See Gennum's Reference Design:
"Interfacing the GS1532 to the GS1528 Multi-rate Cable Driver"
PCLK
BLANK
H
V
F
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75
PCLK
BLANK
H
V
F
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GS1531 Data Sheet
6. References & Relevant Standards
SMPTE 125M
Component video signal 4:2:2 – bit parallel interface
SMPTE 260M
1125 / 60 high definition production system – digital representation and bit
parallel interface
SMPTE 267M
Bit parallel digital interface – component video signal 4:2:2 16 x 9 aspect ratio
SMPTE 274M
1920 x 1080 scanning analog and parallel digital interfaces for multiple picture
rates
SMPTE 291M
Ancillary Data Packet and Space Formatting
SMPTE 292M
Bit-Serial Digital Interface for High-Definition Television Systems
SMPTE 293M
720 x 483 active line at 59.94 Hz progressive scan production – digital
representation
SMPTE 296M
1280 x 720 scanning, analog and digital representation and analog interface
SMPTE 352M
Video Payload Identification for Digital Television Interfaces
SMPTE RP165
Error Detection Checkwords and Status Flags for Use in Bit-Serial Digital
Interfaces for Television
SMPTE RP168
Definition of Vertical Interval Switching Point for Synchronous Video Switching
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GS1531 Data Sheet
7. Package & Ordering Information
7.1 Package Dimensions
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GS1531 Data Sheet
7.2 Packaging Data
Parameter
Value
Package Type
11mm x 11mm 100-ball LBGA
Package Drawing Reference
JEDEC M0192
Moisture Saturation Level
3
Junction to Case Thermal Resistance, θj-c
10.4°C/W
Junction to Air Thermal Resistance, θj-a (at zero airflow)
37.1°C/W
Psi
0.4°C/W
Pb-free and RoHS compliant (GS1531-CBE2 only)
Yes
7.3 Ordering Information
Part Number
Package
Pb-free and
RoHS Compliant
Temperature Range
GS1531-CBE2
100-ball BGA
Yes
0°C to 70°C
GS1531-CB
100-ball BGA
No
0°C to 70°C
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GS1531 Data Sheet
8. Revision History
Version
ECR
PCN
Date
Changes and / or Modifications
1
134904
–
November 2004
Changed interfacing resistor values between GS1531 and GS1528A on
Typical Application Circuit. Added note for PCLK Jitter Tolerance.
2
136174
–
March 2005
Update SCLK to show as a burst clock. Remove “Green” references.
3
136663
–
May 2005
Updated the status of the VD_STD[4:0] and STD_LOCK and INT_PROGb
bits following a device reset or the removal of the input PCLK. Changed the
GSPI Input Data Hold Time to a minimum instead of a maximum.
4
136981
–
July 2005
Added note on 59.94Hz and 60Hz formats to Table 4-4 on page 29.
Corrected PCLK to Data Timing (Figure 4-1 on page 23). Changed note on
ESD protection in Absolute Maximum Ratings on page 13. Corrected setup
time and hold time labels in Table 2-2 on page 14 and Figure 4-1 on
page 23. Converted to Data Sheet.
5
141995
41245
October 2006
Modified internal register addresses to hexidecimal values in
Table 4-12.Specified that serializer can reject >300ps pclk jitter in
Description section on page 1. Corrected IO_PROG pin setting typing error
in Section 4.6.2.1. Corrected VIDEO_FORMAT register labels in description
of bit 6 (352M_INS) in Table 4-5.
6
143759
42774
February 2007
Recommended GO1555 VCO for new designs. Updated Section 5.1
Typical Application Circuit. Added Section 4.8.3 Loop Bandwidth
Adjustment.
7
148907
–
February 2008
Changed register RASTER_STRUCTURE2 from 12 bits to 13 bits in Table
4-3: Host Interface Description for Raster Structure Registers. Changes
related to DVB-ASI mode in Pin Descriptions, Section 4.2.2, Section 4.2.4,
Table 4-1 & Section 4.4. Changed SMPTE 352 Lines from 13 to 10 in
Table 4-4.
CAUTION
ELECTROSTATIC SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
DOCUMENT IDENTIFICATION
DATA SHEET
The product is in production. Gennum reserves the right to make
changes at any time to improve reliability, function or design, in order to
provide the best product possible.
GENNUM CORPORATION
Mailing Address: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Shipping Address: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku, Shinjuku-ku, Tokyo, 160-0023 Japan
Tel. +81 (03) 3349-5501, Fax. +81 (03) 3349-5505
GENNUM UK LIMITED
25 Long Garden Walk, Farnham, Surrey, England GU9 7HX
Tel. +44 (0)1252 747 000 Fax +44 (0)1252 726 523
Gennum Corporation assumes no liability for any errors or omissions in this document, or for the use of the
circuits or devices described herein. The sale of the circuit or device described herein does not imply any
patent license, and Gennum makes no representation that the circuit or device is free from patent infringement.
GENNUM and the G logo are registered trademarks of Gennum Corporation.
© Copyright 2004 Gennum Corporation. All rights reserved. Printed in Canada.
www.gennum.com
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