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參數(shù)資料
| 型號(hào)： | AM79C961A |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | PCnet ⑩-ISA II Jumperless, Full Duplex Single-Chip Ethernet Controller for ISA |
| 中文描述： | PCnet⑩- 2跳線的ISA，全雙工單芯片以太網(wǎng)控制器為ISA |
| 文件頁數(shù)： | 58/85頁 |
| 文件大小： | 1088K |
| 代理商： | AM79C961A |
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58
Am79C961A
P R E L I M I N A R Y
Polling
When there is no channel activity and there is no pre-
or post-receive or transmit activity being performed by
the PCnet-ISA II controller then the PCnet-ISA II con-
troller will periodically poll the current receive and
transmit descriptor entries in order to ascertain their
ownership. If the DPOLL bit in CSR4 is set, then the
transmit polling function is disabled.
A typical polling operation consists of the following: The
PCnet-ISA II controller will use the current receive
descriptor address stored internally to vector to the
appropriate Receive Descriptor Table Entry (RDTE). It
will then use the current transmit descriptor address
(stored internally) to vector to the appropriate Transmit
Descriptor Table Entry (TDTE). These accesses will be
made to RMD1 and RMD0 of the current RDTE and
TMD1 and TMD0 of the current TDTE at periodic poll-
Initialization
Block
24-Bit Base Address
Pointer to
Initialization Block
IADR[15:0]
IADR[23:16]
RES
CSR1
CSR2
TDRA[15:0]
RES
MODE
PADR[15:0]
PADR[31:16]
PADRF[47:32]
LADRF[15:0]
LADRF[31:16]
LADRF[47:32]
LADRF[63:48]
RDRA[15:0]
RES
RLEN
RDRA[23:16]
TLEN
TDRA[23:16]
RCV
Buffers
RX DESCRIPTORing
1st desc.
start
RMD0
RMD1
RMD2
RMD3
RCV Descriptor
N
N
N
N
2nd desc.
start
RMD0
XMT
Buffers
RX DESCRIPTOR RINGS
TMD0
TMD1
TMD2
TMD3
RX DESCRIPTOR RINGS
XMT Descriptor
Ring
M
M
M
M
1st desc.
start
2nd desc.
start
TMD0
Data
Buffer 1
Data
Buffer 2
Data
Buffer
N
Data
Buffer 1
Data
Buffer 2
Data
Buffer
M
19364A-11
Initialization Block and Descriptor Rings
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C961A_00 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-ISA II Jumperless, Full Duplex Single-Chip Ethernet Controller for ISA |
| AM79C961AKC | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-ISA II Jumperless, Full Duplex Single-Chip Ethernet Controller for ISA |
| AM79C961AKC/W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
| AM79C961AKCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-ISA II Jumperless, Full Duplex Single-Chip Ethernet Controller for ISA |
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