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參數(shù)資料
| 型號： | LAN91C100-FD |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY |
| 中文描述： | 2 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP208 |
| 封裝： | QFP-208 |
| 文件頁數(shù)： | 9/79頁 |
| 文件大小： | 585K |
| 代理商： | LAN91C100-FD |
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FEAST Fast Ethernet Controller with Full Duplex Capability
SMSC DS – LAN91C100FD Rev. D
Page 9
Rev.
10/14/2002
PRELIMINARY
PQFP/TQFP
PIN NO.
42, 40-38,
36-33
NAME
SYMBOL
BUFFER
TYPE
I/O4 with
pullups
DESCRIPTION
RAM Data
Bus
RD0-RD7
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).
Bidirectional. Carries the local buffer memory
read and write data. Reads are always 32 bits
wide. Writes are controlled individually at the
byte level.
59, 56,
49-47,
45-43,
69-67, 65,
64, 62-60,
81-76, 71,
70
84, 87, 88,
90, 91, 96,
99, 101,
100, 98, 89,
92, 103,
102, 104
97
RAM Data
Bus
RD8-
RD31
I/O4 with
pullups
RAM
Address
Bus
RA2-RA16
O4
Outputs. This bus specifies the buffer RAM
doubleword being accessed by the
LAN91C100FD.
nROE
O4
Output. Active low signal used to read a
doubleword from buffer RAM.
Outputs. Active low signals used to write any
byte, word or dword in RAM.
Output. This pin is active during LAN91C100FD
write memory cycles of receive packets.
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.
+5V power supply pins.
31, 57, 73,
86
93
nRWE0-
RWE3
RCVDMA
O4
Receive
DMA
Crystal 1
Crystal 2
O4
3
4
XTAL1
XTAL2
Iclk
5, 10, 23,
27, 41, 63,
74, 83, 85,
107, 119,
125, 132,
143, 165,
179, 186,
191
205
Power
VDD
Analog
Power
Ground
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
203
GND
Ground pins.
Analog
Ground
Transmit
Enable
AGND
Analog ground pin.
2
TXEN
O4
Output. Used for 10 Mbps ENDEC. This pin
stays low when MIISEL is high.
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