CL-PS7500FE-QC-A Ver la hoja de datos (PDF) - Cirrus Logic
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CL-PS7500FE-QC-A Datasheet PDF : 251 Pages
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CL-PS7500FE
System-on-a-Chip for Internet Appliance
2.1 CL-PS7500FE Pin Descriptions (cont.)
Name
BOUT
ECLK
ED[7:0]
GOUT
HCLK
HSYNC
PCOMP
ROUT
SCLK
SDCLK
SDO
SYNC
VCLKI
VCLKO
Type
AO
OCZ
OCZ
AO
IT
OCZ
OCZ
AO
IT
OCZ
OCZ
IT
IC
OCZ
Drive
Strength
Description
BLUE ANALOG OUTPUT: The video signal analog outputs are
designed to drive doubly-terminated 75-Ω lines.
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.
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.
GREEN ANALOG OUTPUT: The video signal analog outputs are
designed to drive doubly-terminated 75-Ω lines.
HIGH SPEED CLOCK: This is the clock used with video sub-
system.
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.
1 PHASE COMPARATOR OUTPUT: Used with VCLK pins.
RED ANALOG OUTPUT: The video signal analog outputs are
designed to drive doubly-terminated 75-Ω lines.
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.
2 SERIAL DATA CLOCK: This clock validates serial sound data on its
rising edge.
2 SERIAL DATA OUT: Serial sound data is output from this pin.
EXTERNAL SYN: This signal is used to synchronize CL-PS7500FE
with another video system.
PHASE COMPARATOR CLOCK IN (for video subsystem).
2 PHASE COMPARATOR CLOCK OUT (for video subsystem).
16
PIN DESCRIPTIONS
ADVANCE DATA BOOK v2.0
June 1997
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