
4-50
Configuration Registers
4.3.67
Memory Write Activity Lower Boundary Register (Index 9Ah)
This register specifies the low memory-address boundary that the activity monitor counts
as activity (addresses A23–A20 are all 0). The high memory address is defined by the
Programmable Memory Write Activity Upper Boundary register at Index 9Bh. This activity
is enabled/masked by bit 7 of the Activity Mask 2 register at Index 76h. This is a write-
only register.
An activity is generated when a memory write to any address greater than the low
address and less than the high address occurs. Address bits A13–A0 are Don’t Cares
when determining if the memory address is within the programmable range.
4.3.68
Memory Write Activity Upper Boundary Register (Index 9Bh)
This register specifies the high memory-address boundary that the activity monitor
counts as activity (addresses A23–A20 are all 0). The low memory-address boundary is
specified by the Programmable Memory Write Activity Lower Boundary register at
Index 9Ah. This activity is enabled/masked by bit 7 of the Activity Mask 2 register at
Index 76h. This is a write-only register.
An activity is generated when a memory write to any address greater than the low
address and less than the high address occurs.
7
0
Bit
Default
LSA19
0
LSA18
0
LSA17
0
LSA16
0
LSA15
0
LSA14
0
(Reserved)
0
ENHIT
0
Bit
Name
R/W
Function
7
6
5
4
3
2
1
0
LSA19
LSA18
LSA17
LSA16
LSA15
LSA14
W
W
W
W
W
W
W
W
Lower boundary memory address SA19
Lower boundary memory address SA18
Lower boundary memory address SA17
Lower boundary memory address SA16
Lower boundary memory address SA15
Lower boundary memory address SA14
(Reserved)
Hit count function enable
ENHIT
7
0
Field
Bit
Default
Hit Count Limit
SC1
0
HSA19
0
HSA18
0
HSA17
0
HSA16
0
(Reserved)
0
SC2
0
SC0
0
Bit
Name
R/W
Function
7
6
5
4
3
2–0
HSA19
HSA18
HSA17
HSA16
W
W
W
W
W
W
Upper boundary memory address SA19
Upper boundary memory address SA18
Upper boundary memory address SA17
Upper boundary memory address SA16
(Reserved)
Hit count limit, bits 2–0
SC2–SC0