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): 7/101頁
文件大?。?/td> 312K
代理商: LAN91C100
7
DESCRIPTION OF PIN FUNCTIONSOF PIN FUNCTIONSPIN FUNCTIONS
PQFP/TQFP
PIN NO.
42,
40-38,
36-33, 59,56,
49-47,
45-43,
69-67, 65,64,
62-60,
81-76, 71,70
NAME
RAM Data
Bus
SYMBOL
RD0-RD31
BUFFER
TYPE
I/O4P
DESCRIPTION
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
LAN91C100.
accessed
by
the
97
nROE
O4
Output. Used to read a doubleword from
buffer RAM.
31,57,
73,86
nRWE0-
RWE3
O4
Outputs. Used to write any byte, word or
dword in RAM.
93
nReceive
DMA
nRCVDMA
O4
Output. This pin is active during
LAN91C100 write memory cycles of receive
packets.
3
4
Crystal 1
Crystal 2
XTAL1
XTAL2
I
CLK
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 pin.
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