FS453/4 AND FS455/6
DATA SHEET: HARDWARE REFERENCE
5.2 Pin Descriptions
Pin
Name
FBGA
Pin
Number
PQFP
Pin
Number
Type/Value
Pin Function Description
Clocks
CLKOUT D13
56
GTL/LVCMOS
output
Pixel Clock Output.
Clock to Graphics
Control Chip (GCC) clock input. Synthesized
from XTAL_IN. 0.78125 to 150 MHz range.
Supports 1.5 to 3.3 volt CMOS or GTL.
CLKIN_P E13
54
Differential
input
Pixel Clock Input Positive.
Clock from
GCC’s buffered form of CLKOUT. Used to
latch input pixel data.
CLKIN_N G12
51
Differential
input
Pixel Clock Input Negative.
Clock from
GCC’s buffered form of CLKOUT. Used to
latch input pixel data. For single-clocked use,
tie CLKIN_N to PREF.
XTAL_IN B10
63
LVTTL
input
Television reference Clock Input.
27 MHz
reference clock input for the video encoder for
use with either external oscillator or 27 MHz
crystal.
XTAL_OUT A11 62
LVTTL
output
Television Clock XTAL Output.
Buffered
version of XTAL_IN. For use with a 27 MHz
crystal.
Global Controls
RESET_L F12
53
TTL
input
(internal pull
down)
Reset.
Active Low. Resets internal state
machines and initializes default register
values.
RSVD0 N11
39
TTL
input
(internal pull
down)
Reserved.
Manufacturing Test Pin. Tie to
VSS.
GPIO3-GPIO0 C1,C2,F1
3,G13
2,3,52,
50
TTL
input/output
General Purpose Input/Output.
GPIO port.
Digital RGB/YCrCb Input/Outputs
P23-P0/V656
M9,N8,M8
N6,M6,N5
M5,N4,M4
N3,L1,K2
K1,J2,J1
H2,H1,G2
G1,F2,F1
E2,E1,D2
34,33,32,
29,28,27,
26,25,24,
23,18,17,
16,15,14,
13,12,11,
10,9,8,
7,6,5
GTL/TTL
input/output
Digital GTL/TTL input port.
Multiplexed
digital video input. Connects to GCC's digital
video out. In 12 bit input modes, P23-P12 are
available for ITU-R BT.656 Video Output. P18-
P12 contain the video data with embedded
control codes while P21, P22, and P23 output
HSync, VSync, and Field respectively.
PREF H12
49
GTL/TTL
REF
Digital GTL/TTL Port Reference input.
Voltage threshold reference for GTL/TTL
inputs. Set to the center of the input data logic
high and low levels, but not to exceed Voltage
Reference Range (see Electrical
Characteristics on page 25).
HSYNC N9
35
GTL/TTL
I/O
Digital HSYNC VGA I/O.
Connects to GCC
HSync.
VSYNC M10
36
GTL/TTL
I/O
Digital VSYNC VGA I/O.
Connects to GCC
VSync.
JANUARY, 2005, VERSION 3.0
17
COPYRIGHT
©
2003-4 FOCUS ENHANCEMENTS, INC.
FOCUS Enhancements Semiconductor
