R4400 Microprocessor User's Manual

8. R4000 Processor Signal Descriptions

This chapter describes the signals used by and in conjunction with the R4000 processor. The signals include the System interface, the Clock/Control interface, the Secondary Cache interface, the Interrupt interface, the Joint Test Action Group (JTAG) interface, and the Initialization interface.

Signals are listed in bold, and low active signals have a trailing asterisk--for instance, the low-active Read Ready signal is RdRdy*. The signal description also tells if the signal is an input (the processor receives it) or output (the processor sends it out).

Figure 8-1 illustrates the functional groupings of the processor signals.

Figure 8-1 R4000 Processor Signals

Chapter Contents

8.1 - System Interface Signals
8.2 - Clock/Control Interface Signals
8.3 - Secondary Cache Interface Signals
8.4 - Interrupt Interface Signals
8.5 - JTAG Interface Signals
8.6 - Initialization Interface Signals
8.7 - Signal Summary

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