ARM R4 Manuale Utente
Processor Signal Descriptions
ARM DDI 0363E
Copyright © 2009 ARM Limited. All rights reserved.
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About the processor signal descriptions
The tables in this appendix list the processor signals, along with their dimensions and direction,
input or output, and a high-level description. Each table also has a clocking column, that
indicates by which clock a signal is sampled or driven. All signals are sampled on or driven from
the rising edge of the clock. The clocking column can also contain the following information:
Any
input or output, and a high-level description. Each table also has a clocking column, that
indicates by which clock a signal is sampled or driven. All signals are sampled on or driven from
the rising edge of the clock. The clocking column can also contain the following information:
Any
Means the input is synchronised inside the processor, so the input can be driven
from any clock.
from any clock.
Tie-off
Means the input must be tied to a fixed value.
Reset
Means the input must only be changed under reset.
Clocking is listed for all outputs, though some are typically synchronized into a different clock
before use.
before use.