8-9
Register: 0xFF09
Multipurpose I/O Bank 0 Enable (MPE0)
Read/Write
MPE0_[7:0]
Multipurpose I/O Bank 0 Enable
[7:0]
These bits control the output enables on the I/O pins
MPIO0_0, MPIO0_1, MPIO0_2, MPIO0_3, MPIO0_4,
MPIO0_5, MPIO0_6, and MPIO0_7. A value of 1 turns on
the pin driver, and a value of 0 3-states the pin. Because
the value in 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
register (
Register: 0xFF0A
Multipurpose I/O Bank 0 Input (MPI0)
Read Only
MPI0_[7:0]
Multipurpose I/O Bank 0 Input
[7:0]
These read only bits read the live input values on the I/O
pins MPIO0_0, MPIO0_1, MPIO0_2, MPIO0_3,
MPIO0_4, MPIO0_5, MPIO0_6, and MPIO0_7.
7
6
5
4
3
2
1
0
MPE0_7
MPE0_6
MPEO_5
MPEO_4
MPEO_3
MPEO_2
MPEO_1
MPEO_0
Defaults:
0
0
0
0
0
0
0
0
7
6
5
4
3
2
1
0
MPI0_7
MPI0_6
MPI0_5
MPI0_4
MPI0_3
MPI0_2
MPI0_1
MPI0_0
Defaults:
0
0
0
0
0
0
0
0
Содержание Symbios SYM53C040
Страница 12: ...xii Preface...
Страница 90: ...4 18 SCSI and DMA Registers...
Страница 98: ...5 8 SFF 8067 Registers...
Страница 110: ...6 12 Two Wire Serial Registers...
Страница 126: ...7 16 Miscellaneous Registers...
Страница 160: ...8 34 System Registers...
Страница 184: ...9 24 Electrical Characteristics...
Страница 194: ...A 10 Register Summary...
Страница 214: ......