© 2003 High Bandwidth Access, Inc. All rights reserved. Product specifications subject to change without notice.

HDV24VL

October 2003

ADP II

3HD166B

Page 13 of 13

SEM

I/O

R/W

OE

Valid Address

Valid Address

Write Cycle

Read Cycle

NOTES:

1. CE

_____

______

and LB

______

Diagram 5. Semaphore Read after Write Timing, Either Side

SIDE A

SIDE B

Match

Match

NOTES:

_____

L

= CE

_____

R

______

and LB

______

2. Timing for both ports is the same. Port B is opposite of port A.

3. This parameter is measured from R/W

____

A

or SEM

________

A

____

B

or SEM

________

B

4. The semaphore will be sent to either side if tSPS is not met. It cannot be guaranteed which side receives semaphore.

.

Diagram 6. Semaphore Write Contention