ARM R4 Manuale Utente
Integration Test Registers
ARM DDI 0363E
Copyright © 2009 ARM Limited. All rights reserved.
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13.2
Programming and reading Integration Test Registers
The Integration Test Registers are programmed using the debug APB interface. For more
information on using the debug APB interface see Chapter 11 Debug.
information on using the debug APB interface see Chapter 11 Debug.
13.2.1
Software access using APB
APB provides a direct method of programming:
•
•
a stand-alone macrocell
•
a macrocell in a CoreSight system.
APB provides access to the programmable control registers of peripheral devices. It has these
features:
features:
•
unpipelined protocol, that is, a second transfer cannot start before the first transfer
completes
completes
•
every transfer takes at least two cycles.
For more information on APB transfers see AMBA 3 APB Protocol v1.0 Specification.