FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 96

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

ECP provides a number of advantages, some of
which are listed below. The individual features
are explained in greater detail in the remainder
of this section.
Vocabulary
The following terms are used in this document:
assert: When a signal asserts it transitions to a
forward: Host to Peripheral communication.
High performance half-duplex forward and
reverse channel
Interlocked handshake, for fast reliable
transfer
Optional single byte RLE compression for
improved throughput (64:1)
Channel addressing for low-cost peripherals
Maintains link and data layer separation
Permits the use of active output drivers
Permits the use of adaptive signal timing
Peer-to-peer capability
"true" state, when a signal deasserts it
transitions to a "false" state.
EXTENDED CAPABILITIES PARALLEL PORT
96
reverse: Peripheral to Host communication
Pword: A port word; equal in size to the width
1
0
These terms may be considered synonymous:
Reference Document:
Capabilities Port Protocol and ISA Interface
Standard, Rev 1.14, July 14, 1993.
document
PeriphClk, nAck
HostAck, nAutoFd
PeriphAck, Busy
nPeriphRequest, nFault
nReverseRequest, nInit
nAckReverse, PError
Xflag, Select
ECPMode, nSelectln
HostClk, nStrobe
of the ISA interface. For this
implementation, PWord is always 8
bits.
A high level.
A low level.
is
available
IEEE 1284 Extended
from
Microsoft.
This