參數(shù)資料
型號: LAN91C100
廠商: SMSC Corporation
英文描述: FEAST⑩ Fast Ethernet Controller
中文描述: 宴⑩快速以太網(wǎng)控制器
文件頁數(shù): 74/101頁
文件大小: 312K
代理商: LAN91C100
74
HIGH-END ISA MACHINES
On ISA machines, the LAN91C100 is accessed
as a 16 bit peripheral. No support for XT (8 bit
peripheral) is provided. The signal connections
are listed in the following table:
Table 4 - High-End ISA Machines Signal Connections
ISA BUS
SIGNAL
A1-A15
LAN91C100 SIGNAL
NOTES
A1-A15
Address bus used for I/O space and register decoding
AEN
AEN
Qualifies valid I/O decoding - enabled access when low
nIORD
nRD
I/O Read strobe - asynchronous read accesses. Address
is valid before leading edge
nIOWR
nWR
I/O Write strobe - asynchronous write access. Address is
valid before leading edge. Data is latched on trailing edge
IOCHRDY
ARDY
This signal is negated on leading nRD, nWR if
necessary. It is then asserted on CLK rising edge after
the access condition is satisfied.
RESET
RESET
A0
nBE0
nSBHE
nBE1
IRQn
INTR0-INTR3
D0-D15
D0-D15
16 bit data bus. The bus byte(s) used to access the
device are a function of nBE0 and nBE1:
nBE0
0
0
1
nBE1
0
1
0
D0-D7
Lower
Lower
Not Used
D8-D15
Upper
Not Used
Upper
Not used = tri-state on reads, ignored on writes.
nIOCS16
nLDEV buffered
nLDEV is a totem pole output. Must be buffered using an
open collector driver. nLDEV is active on valid decodes
of A15-A4 and AEN=0.
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