PCI930

3-TO-1 ZOOMED VIDEO SWITCH

SCPS018B – OCTOBER 1997 – REVISED DECEMBER 1997

1

POST OFFICE BOX 655303

3 ZV Sources

PCI1220/1221 Leadership PC Card

Controllers

PCI1220/1221 Control Signal Outputs

Video Standard

Used to Switch a Fourth External ZV

Source

Using Registers in the PCI1220/1221

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.

PCI1220

PC Card

Controller

PCI Bus

PC Card

™

Socket A

PC Card

Socket B

23

23

PCI930

3-to-1 ZV

Switch

23

23

Third ZV

Source

2 Control Pins

ZV Output to VGA Controller

and Audio CODEC

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).

Control Pin

(See Note 2)

68

68

(See Note 1)

Figure 1. System-Level Diagram for PCI930 with the PCI1220 PC Card Controller

PC Card is a trademark of Personal Computer Memory Card International Association (PCMCIA).

TI is a trademark of Texas Instruments Incorporated.

Copyright

© 1997, 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.

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.