
ADVANCE DATA BOOK v2.0
June 1997
16
PIN DESCRIPTIONS
CL-PS7500FE
System-on-a-Chip for Internet Appliance
BOUT
AO
BLUE ANALOG OUTPUT:
The video signal analog outputs are
designed to drive doubly-terminated 75-
lines.
ECLK
OCZ
3
EXTERNAL CLOCK:
When enabled, this clock validates the data
on ED[7:0]. In normal video mode, it runs at the pixel rate, but when
LCD data is being produced, it runs at a quarter of the pixel rate.
ED[7:0]
OCZ
2
EXTERNAL DATA:
This is the digital video output port of the
CL-PS7500FE. From this, the digital equivalent of the analog output
can be produced in any color, or data from the external palette may
be produced. This can be used for a variety of purposes such as
fading or supremacy. Also, data for driving LCD panels is output
from this port. Data produced is validated by
ECLK.
GOUT
AO
GREEN ANALOG OUTPUT:
The video signal analog outputs are
designed to drive doubly-terminated 75-
lines.
HCLK
IT
HIGH SPEED CLOCK:
This is the clock used with video sub-
system.
HSYNC
OCZ
3
HORIZONTAL SYNCHRONIZATION:
There are two synchroniza-
tion outputs on
the
CL-PS7500FE, HSYNC and VSYNC. Dependent
on the state of bits 17 and 16 in the video External register, either a
horizontal or a composite (NOR) sync can be output on this pin, in
either polarity. The width of the HSYNC pulse is definable in units of
2 pixels.
PCOMP
OCZ
1
PHASE COMPARATOR OUTPUT:
Used with VCLK pins.
ROUT
AO
RED ANALOG OUTPUT:
The video signal analog outputs are
designed to drive doubly-terminated 75-
lines.
SCLK
IT
SOUND CLOCK:
This signal can be used to clock the sound sys-
tem, when a clock asynchronous to the internal video reference
clock is required.
SDCLK
OCZ
2
SERIAL DATA CLOCK:
This clock validates serial sound data on its
rising edge.
SDO
OCZ
2
SERIAL DATA OUT:
Serial sound data is output from this pin.
SYNC
IT
EXTERNAL SYN:
This signal is used to synchronize CL-PS7500FE
with another video system.
VCLKI
IC
PHASE COMPARATOR CLOCK IN
(for video subsystem).
VCLKO
OCZ
2
PHASE COMPARATOR CLOCK OUT
(for video subsystem).
2.1
CL-PS7500FE Pin Descriptions
(cont.)
Name
Type
Drive
Strength
Description