Motorola DSP96002 User Manual
Page 805
MOTOROLA
23
tors could be “least recently used” although they can not be replaced. Therefore, the “next
to be replaced sector” is the only sector whose lru bit is set and lock bit cleared. The ex-
ception to this rule is the case where all of the eight sectors are locked and designated as
“least recently used”, in which case there is no “next to be replaced sector” because no
sector will be replaced until at least one sector is unlocked.
TAG number 0
0
31
msb
lsb
0
0
7
6
TAG number 1
msb
lsb
0
0
TAG number 2
msb
lsb
0
0
TAG number 3
msb
lsb
0
0
TAG number 4
msb
lsb
0
0
TAG number 5
msb
lsb
0
0
TAG number 6
msb
lsb
0
0
TAG number 7
msb
lsb
0
0
lock
lock 0
0
0
0
1
7
7
lru
lru
lru
LRU/LOCK status
31
30
29
16
17
15
0
lock
1
28
Figure 4 - Circular Tags Buffer