ISA Address Bus SA0 - SA1
TABLE 5 - SA[1:0] PIN MULTIPLEXING
MUX CONTROLS
PIN NAME
HS1
HS0
SELECTED FUNCTION
SA[1:0]
0
0
NOT DEFINED
0
1
SA[1:0]
1
0
GPIO[4:3]
1
1
GPIO[4:3]
ISA Address Bus SA2 - SA4
TABLE 6 - SA[4:2] PIN MULTIPLEXING
MUX CONTROLS
PIN NAME
HS1
HS0
SELECTED FUNCTION
SA[4:2]
0
0
NOT DEFINED
0
1
SA[4:2]
1
0
BS[2:0]
1
1
BS[2:0]
ISA nIOR
PIN NAME
nIOR
TABLE 7 - nIOR PIN MULTIPLEXING
MUX CONTROLS
HS1
HS0
SELECTED FUNCTION
0
0
NOT DEFINED
0
1
nIOR
1
0
R/nW
1
1
nIOR
ISA nIOW
PIN NAME
nIOW
TABLE 8 - nIOW PIN MULTIPLEXING
MUX CONTROLS
HS1
HS0
SELECTED FUNCTION
0
0
NOT DEFINED
0
1
nIOW
1
0
DSTRB
1
1
nIOW
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