AX88196
Local CPU BUS MAC Controller
5.3 MC68K CPU bus type access functions.
68K bus I/O Read function
Function Mode
Standby Mode
Byte Access
/CS
H
L
L
L
/UDS /LDS
R/W
X
H
H
H
SD[15:8]
High-Z
Not Valid
Even-Byte
Even-Byte
SD[7:0]
High-Z
Odd-Byte
Not Valid
Odd-Byte
X
H
L
L
X
L
H
L
Word Access
68K bus I/O Write function
Function Mode
Standby Mode
Byte Access
/CS
H
L
L
L
/UDS /LDS
R/W
X
L
L
L
SD[15:8]
X
SD[7:0]
X
Odd-Byte
X
X
H
L
L
X
L
H
L
X
Even-Byte
Even-Byte
Word Access
Odd-Byte
5.4 MCS-51 CPU bus type access functions.
8051 bus I/O Read function
Function Mode
Standby Mode
/CS
H
X
L
L
/PSEN SA0
/IORD
/IOWR
SD[15:8]
High-Z
High-Z
Not Valid
Not Valid
SD[7:0]
High-Z
High-Z
Even-Byte
Odd-Byte
X
L
H
H
X
X
L
X
X
L
L
X
X
H
H
Byte Access
H
8051 bus I/O Write function
Function Mode
Standby Mode
/CS
H
X
L
L
/PSEN SA0
/IORD
/IOWR
SD[15:8]
SD[7:0]
X
X
L
H
H
X
X
L
X
X
H
H
X
X
L
L
X
X
X
X
X
Byte Access
Even-Byte
Odd-Byte
H
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ASIX ELECTRONICS CORPORATION
ASIX [ ASIX ELECTRONICS CORPORATION ]
