w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 25
w83c554f
Manufacturer Part Number
w83c554f
Description
System I/o Controller With Pci Arbiter & Ultradma/33 Ide Controller
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83C554F.pdf
(156 pages)
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W83C554F
WINBOND ELECTRONICS CORP. AMERICA
Pin Name
PMACT# /
ISARST
SD[15:0]
Pin #
5
208-204,
202,199,
197,123,
125,126,
128-131,
133
Table 2-5 (Continued). ISA Bus Signals
Input/
Output
Output
Input /
Output
Description
This multi-function pin functions as ISA Reset when the
W83C554F is in PowerPC mode, as determined by pin 8 strapping
after power-up. It is driven for one millisecond duration after one of
the following conditions:
ISA Reset is the inverted logical equivalent of PCI Reset.
When the W83C554F is in x86 mode, this pin functions as Power
Management Active. It is the output signal to the CPU bridge
which indicates the system activity status by becoming active when
a break event has occurred. Break events are programmed into PCI
Configuration Registers index 60h - 63h.
Bi-directional Data Bus.
- PWRGD active edge
- Hot Reset bit set (port 92, bit 0)
- Reset Drive bit set (Clock Divisor Register bit 3)
Pin Descriptions
23
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