FS450, FS451
PRELIMINARY PRODUCT DESCRIPTION
JUNE, 2000, VERSION 1.2
13
COPYRIGHT
©
© 1999,2000 FOCUS ENHANCEMENTS, INC.
PRELIMINARY INFORM ATION
5. Pin Descriptions
Pin
Name
Pin
Number
Type/Value
Pin Function Description
Clocks
VGA_CKOUT
31
GTLP output
(open drain)
VGA Clock Output. Clock to GCC TVCLKIN. Synthesized
from TV_CKIN. 27 to 85 MHz range.
VGA_CKOUTTL
39
LVTTL output
VGA Clock Output. Clock to GCC TVCLKIN. Synthesized
from TV_CKIN. 27 to 85 MHz range.
VGA_PCKIN
65
GTLP input
VGA Clock Input Positive Edge. Clock from GCC
CLKOUT, buffered form of VGA_CKOUT. Used to latch rising
edge RGB data.
VGA_NCKIN
64
GTLP input
VGA Clock Input Negative Edge. Clock from GCC
CLKOUT, buffered form of VGA_CKOUT. Used to latch
negative edge RGB data.
TV_CKIN
1
LVTTL input
Television Clock Input. Clock for the CCIR 656 I/O and the
video encoder. 27 MHz.
XTAL
2
LVTTL output
Television Clock XTAL Output. Buffered version of
TV_CKIN. For use with a 27 MHz crystal.
HSYNC_OUT
71
LVTTL output
HSYNC Output. Output from FS450 to GCC to support slave
mode operation.
VSYNC_OUT
68
LVTTL output
VSYNC Output. Output from FS450 to GCC to support slave
mode operation.
Global Controls and Reserved Pins
RESET
28
TTL input
(pull down)
Reset. Active Low. Resets internal state machines and
initializes default register values.
Reserved
5,29,30
TTL input
(ground)
Reserved Inputs. Connect to VSS.
Reserved
6,20,21,
34,35,100
LVTTL output
(leave open)
Reserved Outputs. Do not connect.
Digital RGB Inputs
P11-P0
63,62,60,5
9,58,57,54
,53,52,51,
49,48
GTLP input
Digital GTLP port input. Digital video input, multiplexed or
non-multiplexed. Connects to GCC's digital video out.
E5-E0
36,37,40,4
1,42,43
GTLP input
Digital GTLP port input. Non-multiplexed extended digital
video input. Connects to GCC's digital video out.
GTL_REF
55
GTLP REF
Digital GTLP Reference input. Voltage threshold reference
for GTLP inputs. Reference is 1.0 volts.
HSYNC_IN
47
GTLP input
Digital HSYNC VGA input. Connects to GCC TVHSYNC.
VSYNC_IN
46
GTLP input
Digital VSYNC VGA input. Connects to GCC TVVSYNC.
BLANK
44
GTLP input
Digital BLANK VGA input. True outside of GCC active
area. Connects to GCC BLANK#.
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