- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366550 > AM79C90 (Advanced Micro Devices, Inc.) CMOS Local Area Network Controller for Ethernet (C-LANCE) PDF資料下載
參數(shù)資料
| 型號： | AM79C90 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | CMOS Local Area Network Controller for Ethernet (C-LANCE) |
| 中文描述： | 的CMOS局域網(wǎng)控制器（丙應(yīng)聘以太網(wǎng)） |
| 文件頁數(shù)： | 29/62頁 |
| 文件大?。?/td> | 437K |
| 代理商： | AM79C90 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁當(dāng)前第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁
P R E L I M I N A R Y
AMD
29
Am79C90
Bit
Name
Description
15
OWN
This bit indicates that the descriptor
entry is owned by the host (OWN =
O) or by the C-LANCE (OWN = 1).
The host sets the OWN bit after filling
the buffer pointed to by this descrip-
tor. The C-LANCE clears the OWN
bit after transmitting the contents of
the buffer. Neither the host nor the C-
LANCE may alter a descriptor entry
after it has relinquished ownership.
ERROR summary is the “OR” of
LCOL, LCAR, UFLO or RTRY.
Setting ADD_FCS=1, instructs the
controller to append a CRC to this
transmitted frame, regardless of the
setting of the DTCR bit (bit 3 in the
Mode Register). The ADD_FCS bit
allows the controller to be configured
to append CRC on a per packet ba-
sis, when DTCR=1. ADD_FCS is
only valid when STP=1.
MORE indicates that more than one
retry was needed to transmit a
packet.
ONE indicates that exactly one retry
was needed to transmit a packet.
The ONE flag is not valid when
LCOL is set.
DEFERRED indicates that the
C-LANCE had to defer while trying to
transmit a packet. This condition oc-
curs if the channel is busy when the
C-LANCE is ready to transmit.
START OF PACKET indicates that
this is the first buffer to be used by
the C-LANCE for this packet. It is
used for data chaining buffers. STP
is set by the host and is not changed
by the C-LANCE. The STP bit must
be set in the first buffer of the packet,
or the C-LANCE will skip over this
descriptor and poll the next descrip-
tor(s) until the OWN and STP bits
areset.
END OF PACKET indicates that this
is the last buffer to be used by the C-
LANCE for this packet. It is used for
data chaining buffers. If both STP
and ENP are set, the packet fits into
one buffer and there is no data
chaining. ENP is set by the host and
is not changed by the C-LANCE.
The HIGH ORDER 8 address bits of
the buffer pointed to by this descrip-
tor. This field is written by the host
and is not changed by the C-LANCE.
14
ERR
13
ADD_FCS
12
MORE
11
ONE
10
DEF
09
STP
08
ENP
07:00
HADR
Transmit Message Descriptor 2 (TMD2)
15
0
17881B-31
12 11
BCNT
ONES
Bit
Name
Description
15:12
ONES
Must be ones. This field is set by the
host and is not changed by the
C-LANCE.
BUFFER BYTE COUNT is the us-
able length in bytes of the buffer
pointed to by this descriptor ex-
pressed as a negative two’s comple-
ment number. This is the number of
bytes from this buffer that will be
transmitted by the C-LANCE. This
field is written by the host and is not
changed by the C-LANCE. The first
buffer of a packet has to be at least
100 bytes minimum when data
chaining and 64 byte (DTCR = 1) or
60 bytes (DCTR = 0) when not data
chaining.
11:00
BCNT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C90JC | CMOS Local Area Network Controller for Ethernet (C-LANCE) |
| AM79C90JCTR | KPTC6CG10-6P |
| AM79C90PC | CMOS Local Area Network Controller for Ethernet (C-LANCE) |
| AM79C90PCTR | CMOS Local Area Network Controller for Ethernet (C-LANCE) |
| AM79C930 | PCnet-Mobile Single-Chip Wireless LAN Media Access Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C900 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| AM79C900AJC | 制造商:Advanced Micro Devices 功能描述: |
| AM79C900JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
| AM79C901 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AMD’s Am79C901 HomePNA-Compliant Device with Motorola’s MC68360. MPC860. MPC850. and MPC8260? - (PDF) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。