Filter
Top Products
PD672X/30/32/33 — ZV Port Implementation
Application Note 9
5.0 Dedicated Socket Approach to ZV Port
Implementation
Figure 2 shows a solution using the PD6722/’29/’30/’6832 Controller and the GD7XXX Super
VGA controller to support a single dedicated ZV Port slot. This simple implementation does not
require any external buffer or glue logic; the only limitation is that one socket must be dedicated to
the ZV Port. Also, depending upon the audio controller used, a buffer may be required between the
PC Card bus and the audio controller. The designer must ensure that while in R2 PC Card mode
(non-ZV operation), the traffic over the bus does not cause the audio input to be driven or the video
port of the VGA controller to be adversely affected. If the audio controller or VGA controller do
not support a shutdown mode, buffers are required in each path. Also refer to “Layout Guidelines”
on page 15 to determine if buffers are required for the video path.
Figure 2. Dedicated Socket Approach to ZV Port Implementation
GD7XXX
PD6722
PD6729
PD6730
PD6832
V-PORT
ZV PORT PC CARD
AUDIO CODEC
PC CARD BUS
PD6833