-Normal Write Protocol

18.6 Cache Test Mode Protocol

Normal Write Protocol

A cache test mode normal write operation writes a selected RAM array. The write address, way, array, and data are specified in the write command.

The external agent issues a normal write command by:

driving the address on SysAD(57:46)
driving the way on SysAD(45)
negating the auto-increment select on SysAD(44)
asserting the Write/Read select on SysAD(43)
driving the array select on SysAD(42:40)
driving the write data on SysAD(39:0)
asserting SysVal* for one SysClk cycle

Normal writes have a repeat rate of 8 PClk cycles.

Figure 18-3 depicts two cache test mode normal writes.

Figure 18-3 Cache Test Mode Normal Write Protocol

Copyright 1995, MIPS Technologies, Inc. -- 29 JAN 96

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