LSI Symbios SYM53C040 Technical Manual page 138

Enclosure services processor
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8-12
Register: 0xFF11
Multipurpose I/O Bank 1 Enable (MPE1)
Read/Write
7
6
MPE1_7
MPE1_6
MPE1_5
0
0
MPE1_[7:0]
Multipurpose I/O Bank 1 Enable
These bits control the output enables on the I/O pins
MPIO1_0, MPIO1_1, MPIO1_2, MPIO1_3, MPIO1_4,
MPIO1_5, MPIO1_6, and MPIO1_7. A value of 1 turns on
the pin driver, and a value of 0 3-states the pin. Because
this register powers up to all zeros, the pins will initially
be 3-stated at power-up. These pins also have internal
100 µ A pull-down resistors, which can be disabled with
the
Multipurpose I/O Bank 3 Pull-down Enable (MPPE3)
register (0xFF25).
Register: 0xFF12
Multipurpose I/O Bank 1 Input (MPI1)
Read Only
7
6
MPI1_7
MPI1_6
MPI1_5
0
0
MPI1_[7:0]
Multipurpose I/O Bank 1 Input
These read only bits read the live input values on the I/O
MPIO1_0, MPIO1_1, MPIO1_2, MPIO1_3, MPIO1_4,
MPIO1_5, MPIO1_6, and MPIO1_7.
System Registers
5
4
3
MPE1_4
MPE1_3
Defaults:
0
0
0
5
4
3
MPI1_4
MPI1_3
Defaults:
0
0
0
2
1
MPE1_2
MPE1_1
MPE1_0
0
0
2
1
MPI1_2
MPI1_1
MPI1_0
0
0
0
0
[7:0]
0
0
[7:0]

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