w83c553f Winbond Electronics Corp America, w83c553f Datasheet - Page 23
w83c553f
Manufacturer Part Number
w83c553f
Description
System I/o Controller With Pci Arbiter
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83C553F.pdf
(159 pages)
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W83C553F
WINBOND SYSTEMS LABORATORY
Pin Name
IDEDRQA
IDEDAKA#
IDEDRQB
IDEDAKB#
DA[2:0]
DD[15:0]
IDECHRDY
IDEIRQB
IDEIRQA
Pin #
97
94
96
93
88,90,89
98,101,103,
105,108,
110,112,
114,115,
113,111,
109,106,
104,102,
100
95
91
92
Table 2-4 (continued). IDE Interface Bus Signals
Input/
Output
Input
Output
Input
Output
Output
Input/
Output
Input
Input
Input
Description
DMA Request A. This signal is the primary port DMA handshake
from the IDE device. When asserted, it indicates a data transfer is
requested.
DMA Acknowledge A. This is the primary port DMA handshake to
the IDE device. When asserted, it indicates a data transfer can be
executed.
DMA Request B. This is the secondary port DMA handshake from
the IDE device. When asserted, it indicates a data transfer is
requested.
DMA Acknowledge B. This is the secondary port DMA handshake
to the IDE device. When asserted, it indicates a data transfer can be
executed.
IDE Drive Address.
IDE Drive Data. 16-bit bi-directional bus.
IDE I/O Channel Ready. When IDECHRDY is negated, the current
cycle will be extended. This input is connected to the primary port,
and can also be connected to the secondary port.
IDE IRQ B. Secondary port interrupt request.
IDE IRQ A. Primary port interrupt request.
Pin Descriptions
20
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