參數(shù)資料
型號: AM79C972BKIW
廠商: ADVANCED MICRO DEVICES INC
元件分類: 微控制器/微處理器
英文描述: PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
中文描述: 5 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16
封裝: PLASTIC, QFP-160
文件頁數(shù): 124/130頁
文件大小: 1580K
代理商: AM79C972BKIW
124
Am79C972
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR27: Next Receive Descriptor Address Upper
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
NRDAU
Contains the upper 16 bits of the
next receive descriptor address
pointer.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR28: Current Receive Descriptor Address Lower
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
CRDAL
Contains the lower 16 bits of the
current receive descriptor ad-
dress pointer.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR29: Current Receive Descriptor Address Upper
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
CRDAU
Contains the upper 16 bits of the
current receive descriptor ad-
dress pointer.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR30: Base Address of Transmit Ring Lower
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
BADXL
Contains the lower 16 bits of the
base address of the Transmit
Ring.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR31: Base Address of Transmit Ring Upper
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
BADXU
Contains the upper 16 bits of the
base address of the Transmit
Ring.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR32: Next Transmit Descriptor Address Lower
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
NXDAL
Contains the lower 16 bits of the
next transmit descriptor address
pointer.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
CSR33: Next Transmit Descriptor Address Upper
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-0
NXDAU
Contains the upper 16 bits of the
next transmit descriptor address
pointer.
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