PCI930 Datasheet, PDF (1/13 Pages) Texas Instruments – 3-TO-1 ZOOMED VIDEO SWITCH

PCI930
3-TO-1 ZOOMED VIDEO SWITCH
D Zoomed Video Switch – Supports up to
3 ZV Sources
D Designed for Use With the TI™
PCI1220/1221 Leadership PC Card
Controllers
D First two (2) ZV Inputs are Controlled by
PCI1220/1221 Control Signal Outputs
D 100% Compliant With the PCMCIA Zoomed
Video Standard
SCPS018B – OCTOBER 1997 – REVISED DECEMBER 1997
D Status Bit Indicates ZV Activity – Can be
Used to Switch a Fourth External ZV
Source
D Switching can be Software Programmed
Using Registers in the PCI1220/1221
D Low Power 3.3-Volt Core Logic
D Small Form Factor 128-Pin TQFP Package
description
The 3-to-1 ZV switch is a companion chip to the PCI1220/1221 PC Card controllers; however, it can be used
in other applications where multiple ZV sources require external buffering. The ZV switch is a 3:1 multiplexer
for the 23 pins defined in the PCMCIA zoomed video interface. The ZV interface includes both the video and
audio data as defined by the Zoomed Video Specification.
The three ZV source interfaces are referred to as A, B, and C. ZV sources A and B are intended for use with
the PCI1220/1221 PC Card zoom video outputs. The third source, C, may be from a variety of external ZV
sources.
An advanced CMOS process is used to achieve low system-power consumption.
Socket A
PC Card™
68
(See Note 1)
Socket B
68
PC Card
PCI1220
PC Card
Controller
PCI Bus
23
23
2 Control Pins
Third ZV
Source
23
PCI930
3-to-1 ZV
Switch
ZV Output to VGA Controller
23
and Audio CODEC
Control Pin
(See Note 2)
NOTES: 1. The PC Card interface is 68 pins for CardBus and 16-bit PC Cards. In zoomed-video mode 23 pins are used for routing the
zoomed video signals too the VGA controller.
2. Control pin for third ZV source (Can Use GPO From PCI1220).
Figure 1. System-Level Diagram for PCI930 with the PCI1220 PC Card Controller
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PC Card is a trademark of Personal Computer Memory Card International Association (PCMCIA).
TI is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1997, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1