GS4901B_09 Datasheet, PDF (10/102 Pages) Gennum Corporation – SD Clock and Timing Generator with GENLOCK

Table 1-1: Pin Descriptions (Continued)
Pin
Number
9
Name
CORE_GND
10
ANALOG_VDD
11, 20, 63
12
NC
ANALOG_GND
13
AUD_PLL_GND
(GS4901B only)
ANALOG_GND
(GS4900B only)
14
AUD_PLL_VDD
(GS4901B only)
ANALOG_GND
(GS4900B only)
15
10FID
16
HSYNC
Timing
Type Description
–
Power
Supply
–
Power
Supply
–
–
–
Power
Supply
–
Power
Supply
–
Power
Supply
–
Power
Supply
–
Power
Supply
Non
Input
Synchronous
Non
Input
Synchronous
Ground connection for core and I/O. Solder to the ground plane of
the application board.
NOTE: The CORE_GND pin should be soldered to the same main
ground plane as the exposed ground pad on the bottom of the
device.
Most positive power supply connection for the analog input block.
Connect to +1.8V DC.
Do not connect.
Ground connection for the analog input block. Connect to GND.
Ground connection for the audio clock synthesis internal block.
Connect to GND.
Ground connection for the analog input block. Connect to GND.
Most positive power supply connection for the audio clock synthesis
internal block. Connect to +1.8V DC.
Ground connection for the analog input block. Connect to GND.
REFERENCE SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
The 10FID external reference signal is applied to this pin by the
application layer. 10FID defines the field in which the video and
audio clock phase relationship is defined according to SMPTE
318-M. It is also used to define a 3:2 video cadence.
NOTE: If the input reference format does not include a 10 Field ID
signal, this pin should be held LOW. See Section 3.4.2 on page 42.
REFERENCE SIGNAL INPUT
Signal levels are LVCMOS/LVTTL compatible.
The HSYNC external reference signal is applied to this pin by the
application layer. When the GS4901B/GS4900B is operating in
Genlock mode, the device senses the polarity of the HSYNC input
automatically, and references to the leading edge.
This signal must adhere to one of the 36 defined video standards
supported by the device. In this mode of operation, the HSYNC
input provides a horizontal scanning reference signal.
The HSYNC signal may have analog timing, such as from a sync
separator, or may be digital such as from an SDI deserializer.
Section 1.4 on page 19 describes the 36 video formats recognized by
the GS4901B/GS4900B.
GS4901B/GS4900B SD Clock and Timing Generator
with GENLOCK
Data Sheet
37703 - 4
December 2009
10 of 102