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参数资料
| 型号： | 91C94 |
| 厂商： | SMSC Corporation |
| 英文描述： | ISA/PCMCIA SINGLE CHIP ETHERNET CONTROLLER WITH RAM |
| 中文描述： | 的ISA / PCMCIA的单芯片以太网控制器与RAM |
| 文件页数： | 60/120页 |
| 文件大小： | 447K |
| 代理商： | 91C94 |
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44
I/O SPACE - BANK1
OFFSET
0
NAME
CONFIGURATION REGISTER
TYPE
READ/WRITE
SYMBOL
CR
The Configuration Register holds bits that define the device configuration and are not expected to
change during run-time. This register is part of the EEPROM saved setup.
HIGH
BYTE
0
NO WAIT
FULL
STEP
SET
SQLCH
AUI
SELECT
0
X
0
X
0
LOW
BYTE
16 BIT
DIS LINK
RESERVED
INT SEL1
INT SEL0
Function of
nEN16 pin
0
1
0
X
NO WAIT - When set, does not request
additional wait states. An exception to this are
accesses to the Data Register if not ready for a
transfer. When clear, negates IOCHRDY for two
to three 20MHz clocks on any cycle to the
LAN91C94.
FULL STEP - This bit is used to select the
signaling mode for the AUI port. When set the
AUI port uses full step signaling. Defaults low to
half step signaling. This bit is only meaningful
when AUI SELECT is high.
SET SQLCH - When set, the squelch level used
for the 10BASE-T receive signal is 240mV.
When
clear
the
receive
squelch
level
is
400mV.Defaults low.
AUI SELECT - When set the AUI interface is
used, when clear the 10BASE-T interface is
used. Defaults low.
16BIT - Used in conjunction with nEN16 and
IOis8 (in PCMCIA mode only) to define the
width of the system bus. If the nEN16 pin is low,
this bit is forced high. Otherwise the bit defaults
low and can be programmed by the host CPU.
DIS LINK - This bit is used to disable the
10BASE-T link test functions. When this bit is
high the LAN91C94 disables link test functions
by not generating nor monitoring the network for
link pulses. In this mode the LAN91C94 will
transmit packets regardless of the link test, the
EPHSR LINK_OK bit will be set and the LINK
LED will stay on. When low the link test
functions are enabled. If the link status indicates
FAIL, the EPHSR LINK_OK bit will be low, while
transmit packets enqueued will be processed by
the LAN91C94, transmit data will not be sent
out to the cable.
INT SEL1-0 - Used to select one out of four
interrupt pins. The three unused interrupts are
tristated.
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相关代理商/技术参数 |
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| 91CCC3 | 制造商:Wirepro 功能描述:Connector Accessories Cap and Chain For Receptacle |
| 91-CCC3 | 制造商:CDM ELECTRONIC FORMERLY WPI 功能描述:connector accessory,circular microphone,cap and chain for receptacle |
| 91-CCC-3 | 制造商:Amphenol Corporation 功能描述: 制造商:TE Connectivity 功能描述: |
| 91CR10 | 制造商:TT Electronics / BI Technologies 功能描述:Res Cermet Trimmer 10 Ohm 20% 1/2W 1(Elec)/1(Mech)Turn (9.53 X 9.78 X 7.11mm) Pin Thru-Hole Box |
| 91CR100 | 功能描述:微调电阻 - 通孔 3/8inch 100 Thumbwheel RoHS:否 制造商:Vishay/Sfernice 产品:Trimmer Resistors - Multi Turn 产品类型:Multiturn 转数:14 锥度:Linear 电阻:10 kOhms 电压额定值:250 V 端接类型:Pin 功率额定值:250 mW (1/4 W) 容差:10 % 温度系数:100 PPM / C |
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