Interface Masters Technologies Inc. Confidential & Proprietary
TAHOE 8824 User Guide
Rev: 01
09/18/2017 Page 20 OF 34
3 CPLD
The CPLD used in the TAHOE 8824 is an Altera MAX II CPLD. The main
purpose of the CPLD is to control power-up and reset sequencing, LED control, boot
strapping, and other miscellaneous glue logic.
Figure 14, TAHOE 8824 CPLD Functional Diagram
3.1 Access Interface
The main interface used to access the control registers of the CPLD is through the
CPU’s P Bus.
3.2 LED Control
All of the system LEDs will be driven by the CPLD and can be controlled by
software through the CPLD control registers.
3.3 Boot Strap
The hardware strap pins of the CN83xx are connected to the CPLD to allow the
user to easily change the boot media device by hardware jumper settings or by the CPLD
control registers for subsequent warm reboots.
