AMD K5 Manual do Utilizador descarregar pdf (Página 36)

AMD-K5 Processor Data Sheet 18522F/0—Jan1997

PRELIMINARY INFORMATION

Table 3. Input/Output Pins

Name When Floated

A31–A5 Bus Hold, Address Hold, BOFF

AP Bus Hold, Address Hold, BOFF

D63–D0 Bus Hold, BOFF

DP7–DP0 Bus Hold, BOFF

Table 4. Test Pins

Name Type Note

TCK Input

TDI Input Sampled on the rising edge of TCK.

TDO Output Driven on the falling edge of TCK.

TMS Input Sampled on the rising edge of TCK.

TRST

Input

Table 5. Bus Cycle Definition

Bus Cycle Initiated

Generated by CPU

Generated

by System

M/IO

D/C W/R CACHE KEN

Code Read, Instruction Cache Line Fill 1000 0

Code Read, Noncacheable 1001 x

Code Read, Noncacheable 1 0 0 x 1

Encoding for Special Cycle 0011 x

Interrupt Acknowledge 0001 x

I/O Read, Noncacheable 0101 x

I/O Write, Noncacheable 0111 x

Memory Read, Data Cache Line Fill 1100 0

Memory Read, Noncacheable 1101 x

Memory Read, Noncacheable 1 1 0 x 1

Memory Write, Data Cache Writeback 1110 x

Memory Write, Noncacheable 1111 x

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 99 100

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AMD K5 Manual do Utilizador Página 36