FOCUS Enhancements FS453 User Manual download pdf (Page 17)

FS453/4 AND FS455/6 DATA SHEET: HARDWARE REFERENCE

5.2 Pin Descriptions

Name

FBGA

Number

PQFP

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,

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.

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