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LAN91C100FD_0601 数据表(PDF) 9 Page - SMSC Corporation

部件名 LAN91C100FD_0601
功能描述  FEAST Fast Ethernet Controller with Full Duplex Capability
Download  78 Pages
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制造商  SMSC [SMSC Corporation]
网页  http://www.smsc.com
标志 SMSC - SMSC Corporation

LAN91C100FD_0601 数据表(HTML) 9 Page - SMSC Corporation

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FEAST Fast Ethernet Controller with Full Duplex Capability
SMSC DS – LAN91C100FD Rev. D
Page 9
Rev. 01-20-06
DATASHEET
PQFP/TQFP
PIN NO.
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
42, 40-38,
36-33
RAM Data
Bus
RD0-RD7
I/O4 with
pullups
Bidirectional. Carries the local buffer memory
read and write data. Reads are always 32 bits
wide. Writes are controlled individually at the
byte level. Floated if FLTST=1 during RECEIVE
FRAME STATUS WORD writes for packet
forwarding information (RA2-RA16=0,
RCVDMA=1, nRWE0-nRWE3=0).
59, 56,
49-47,
45-43,
69-67, 65,
64, 62-60,
81-76, 71,
70
RAM Data
Bus
RD8-
RD31
I/O4 with
pullups
Bidirectional. Carries the local buffer memory
read and write data. Reads are always 32 bits
wide. Writes are controlled individually at the
byte level.
84, 87, 88,
90, 91, 96,
99, 101,
100, 98, 89,
92, 103,
102, 104
RAM
Address
Bus
RA2-RA16
O4
Outputs. This bus specifies the buffer RAM
doubleword being accessed by the
LAN91C100FD.
97
nROE
O4
Output. Active low signal used to read a
doubleword from buffer RAM.
31, 57, 73,
86
nRWE0-
RWE3
O4
Outputs. Active low signals used to write any
byte, word or dword in RAM.
93
Receive
DMA
RCVDMA
O4
Output. This pin is active during LAN91C100FD
write memory cycles of receive packets.
3
4
Crystal 1
Crystal 2
XTAL1
XTAL2
Iclk
An external 25 MHz crystal is connected across
these pins. If a TTL clock is supplied instead, it
should be connected to XTAL1 and XTAL2
should be left open.
5, 10, 23,
27, 41, 63,
74, 83, 85,
107, 119,
125, 132,
143, 165,
179, 186,
191
Power
VDD
+5V power supply pins.
205
Analog
Power
AVDD
+5V analog power supply pins.
14, 32, 46,
50, 66, 75,
82, 94, 111,
116, 120,
122, 128,
134, 138,
169, 174,
180, 185,
200
Ground
GND
Ground pins.
203
Analog
Ground
AGND
Analog ground pin.
2
Transmit
Enable
TXEN
O4
Output. Used for 10 Mbps ENDEC. This pin
stays low when MIISEL is high.


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