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): 6/101頁
文件大小: 312K
代理商: LAN91C100
6
DESCRIPTION OF PIN FUNCTIONSOF PIN FUNCTIONSPIN FUNCTIONS
PQFP/TQFP
PIN NO.
108
NAME
nLocal
Device
SYMBOL
nLDEV
BUFFER
TYPE
O16
DESCRIPTION
Output. This active low output is asserted
when AEN is low and A4-A15 decode to the
LAN91C100 address programmed into the
high byte of the Base Address Register.
nLDEV is a combinatorial decode of
unlatched address and AEN signals.
177
nRead
Strobe
nRD
IS
Input. Used in asynchronous bus
interfaces.
178
nWrite
Strobe
nWR
IS
Input.
interfaces.
Used
in
asynchronous
bus
190
nData Path
Chip Select
nDATACS
IP
Input. When nDATACS is low, the Data
Path can be accessed regardless of the
values of AEN, A1-A15 and the content of
the BANK SELECT Register. nDATACS
provides an interface for bursting to and
from the LAN91C100 32 bits at a time.
54
EEPROM
Clock
EESK
O4
Output. 4
μ
sec clock used to shift data in
and out of the serial EEPROM.
55
EEPROM
Select
EECS
O4
Output. Used for selection and command
framing of the serial EEPROM.
52
EEPROM
Data Out
EEDO
O4
Output. Connected to the DI input of the
serial EEPROM.
53
EEPROM
Data In
EEDI
ID
Input. Connected to the DO output of the
serial EEPROM.
13,15,16
I/O Base
IOS0-IOS2
IP
Input. External switches can be connected
to these lines to select between predefined
EEPROM configurations.
51
Enable
EEPROM
ENEEP
IP
Input. Enables (when high or open)
LAN91C100
accesses
EEPROM. Must be grounded if no
EEPROM is connected to the LAN91C100.
to
the
serial
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