Description
There are essentially six pins of concern if an Excalibur device is being used without the embedded stripe. Table 1 lists the six pins and how they should be connected.
| Table 1. Connecting Excalibur Embedded Stripe Pins | |
| Pin | Connection |
|---|---|
NPOR | Logic '1' |
NRESET | Logic '1' |
DEBUG_EN | Logic '1' or '0', do not leave unconnected |
JSELECT | Logic '1' or '0', do not leave unconnected |
CLK_REF | Must be driven with a 10 MHz to 66 MHz clock signal |
BOOT_FLASH | Logic '0' |
The embedded stripe control pins must be connected in this manner to allow the device to configure and function correctly when the embedded stripe is not being used. Additionally, this connection scheme assures that the dual-port SRAM can still be accessed from the programmable logic device (PLD).