Motorola DSP96002 - Manual (Page 850)

68 MOTOROLA
PUNLOCK Program-Cache-Sector PUNLOCK
Unlock
Instruction Fields:
ea Rn - R0-R7 (Memory alterable addressing modes only)
Absolute Address - 32 bits
Timing: 4 + ea oscillator clock cycles
Memory: 1 + ea program words
00 0000 1000 0000
31 14 13 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION
0000 0011 0100 MMMR RR
Operation:
Unlock sector by ea
Assembler Syntax:
PUNLOCK ea
Description:
Unlock the cache sector to which the specified effective address belongs. If the specified effective address
does not belong to any cache sector, and is therefore definitely unlocked, nevertheless, load the least re-
cently used cache sector tag with the 25 most significant bits of the specified address. Update the LRU
stack accordingly. All memory alterable addressing modes may be used for the effective address, but not
a short absolute address.
The PUNLOCK instruction is enabled only in Cache Mode. In PRAM Mode it will cause an illegal instruction
trap to be taken.
CCR Condition Codes: Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: PUNLOCK ea