B.1. Signal properties and requirements

In order to ensure ease of integration of the ARM946E-S into embedded applications and to simplify synthesis flow, the following design techniques have been used:

These techniques simplify the definition of the top-level ARM946E-S signals as all outputs change from the rising edge and all inputs are sampled with the rising edge of the clock. In addition, all signals are either input or output only, as bidirectional signals are not used.

Note

You must use external logic to synchronize asynchronous signals (for example interrupt sources) before applying them to the ARM946E-S macrocell.

Copyright © 2000 ARM Limited. All rights reserved.ARM DDI 0155A
Non-Confidential