參數(shù)資料
型號： AM79C976
廠商： Advanced Micro Devices, Inc.
英文描述： PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller
中文描述： PCnet -專業(yè)⑩個(gè)10/100Mbps PCI以太網(wǎng)控制器
文件頁數(shù)： 111/309頁
文件大?。?/td> 2070K
代理商： AM79C976
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頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁當(dāng)前第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁第193頁第194頁第195頁第196頁第197頁第198頁第199頁第200頁第201頁第202頁第203頁第204頁第205頁第206頁第207頁第208頁第209頁第210頁第211頁第212頁第213頁第214頁第215頁第216頁第217頁第218頁第219頁第220頁第221頁第222頁第223頁第224頁第225頁第226頁第227頁第228頁第229頁第230頁第231頁第232頁第233頁第234頁第235頁第236頁第237頁第238頁第239頁第240頁第241頁第242頁第243頁第244頁第245頁第246頁第247頁第248頁第249頁第250頁第251頁第252頁第253頁第254頁第255頁第256頁第257頁第258頁第259頁第260頁第261頁第262頁第263頁第264頁第265頁第266頁第267頁第268頁第269頁第270頁第271頁第272頁第273頁第274頁第275頁第276頁第277頁第278頁第279頁第280頁第281頁第282頁第283頁第284頁第285頁第286頁第287頁第288頁第289頁第290頁第291頁第292頁第293頁第294頁第295頁第296頁第297頁第298頁第299頁第300頁第301頁第302頁第303頁第304頁第305頁第306頁第307頁第308頁第309頁
8/01/00
Am79C976
111
P R E L I M I N A R Y
USER ACCESSIBLE REGISTERS
The Am79C976 controller has four types of user regis-
ters: the PCI configuration registers, the memory-
mapped registers, the Control and Status registers
(CSRs), and the Bus Control registers (BCRs). The
CSRs and BCRs are included for software compatibility
with older PCnet family devices. However, all CSR and
BCR functions can be accessed more efficiently
through the memory-mapped registers. Software writ-
ten for the Am79C976 device and future PCnet family
devices does not have to access any CSR or BCR.
The Am79C976 controller implements all PCnet-ISA
(Am79C960) registers, all C-LANCE (Am79C90) regis-
ters, all PCnet-FAST (Am79C971) registers, plus a
number of additional registers. The Am79C976 CSRs
are compatible upon power up with both the PCnet-ISA
CSRs and all of the C-LANCE CSRs.
The PCI configuration registers and the memory-
mapped registers can be accessed in any data width.
The CSRs and BCRs must be accessed according to
the I/O mode that is currently selected. When WIO
mode is selected, all CSR and BCR locations are de-
fined to be 16 bits in width. When DWIO mode is se-
lected, all these register locations are defined to be 32
bits in width, with the upper 16 bits of most register lo-
cations marked as reserved locations with undefined
values. When performing register write operations in
DWIO mode, the upper 16 bits should always be written
as zeros. When performing register read operations in
DWIO mode, the upper 16 bits of I/O resources should
always be regarded as having undefined values, ex-
cept for CSR88.
The Am79C976 controller
’
s registers can be divided
into several functional groups: PCI Configuration Alias
registers, PCI Configuration registers, Setup registers,
Running registers, and Test registers.
The PCI Configuration Alias registers are typically pro-
grammed through the EEPROM read operation. In this
way, they are initialized before the BIOS accesses the
PCI Configuration registers. This group includes the
MAX_LAT_A, MIN_GNT_A, PCIDATA0 - 7, PMC_A,
SID_A, SVID_A and VID_A registers and the
ROM_CFG register.
The PCI Configuration registers are accessed by the
system BIOS software to configure the Am79C976
controller. These registers include the Memory Base
Address register, the Expansion ROM Base Address
register, the Interrupt Line register, the PCI Command
register, the PCI Status register and the PMC register.
Typically, device information will also be read from the
SID, SVID and VID registers.
The Setup registers include most of the remaining
memory mapped registers. The programming of these
is typically divided between the EEPROM and the
driver software. Many of these registers are optional
and need not be initialized unless the associated func-
tion is used.
Typically, the SRAM_SIZE, SRAM_BND and PADR
registers are initialized from the EEPROM. The driver
initializes the BADR, BADX, RCV_RING_LEN,
XMT_RING_LEN and LADRF registers. The CMD2,
CMD3, CTRL0, CTRL1 and CTRL2 registers are typi-
cally partially initialized from the EEPROM and partially
by the driver. The CMD7 and CTRL3 registers are ini-
tialized by the driver. The driver reads the
MIB_OFFSET and CHIPID registers at initialization
time. The PHY_ACCESS register may be used at this
time to initialize the external PHY.
Running registers are accessed by the driver software.
These include the CMD0, INT0, INTEN0, STAT0,
LADRF and MIB registers. The driver may access other
registers during operation depending on the features
being used.
PCI Configuration Registers
0=*
Offset 00h
The PCI Vendor ID register is a 16-bit register that iden-
tifies the manufacturer of the Am79C976 controller.
AMD
’
s Vendor ID is 1022h. Note that this vendor ID is
not the same as the Manufacturer ID in CSR88 and
CSR89. The vendor ID is assigned by the PCI Special
Interest Group.
The PCI Vendor ID register is read only.
This register is the same as BCR35, which can be writ-
ten by the EEPROM.
0*(*
Offset 02h
The PCI Device ID register is a 16-bit register that
uniquely identifies the Am79C976 controller within
AMD's product line. The Am79C976 Device ID is
2000h. Note that this Device ID is not the same as the
Part number in CSR88 and CSR89. The Device ID is
assigned by AMD. The Device ID is the same as the
PCnet-PCI II (Am79C970A) and PCnet-
FAST
(Am79C971) devices.
The PCI Device ID register is read only.
0!!
Offset 04h
The PCI Command register is a 16-bit register used to
control the gross functionality of the Am79C976 con-
troller. It controls the Am79C976 controller's ability to
generate and respond to PCI bus cycles. To logically
disconnect the Am79C976 device from all PCI bus cy-
cles except configuration cycles, a value of 0 should be
written to this register.
相關(guān)PDF資料
PDF描述
AM79C976KIW PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller
AM79C976KCW PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller
AM79C978AKCW Single-Chip 1/10 Mbps PCI Home Networking Controller
AM79C978AVCW Single-Chip 1/10 Mbps PCI Home Networking Controller
AM79C978 Single-Chip 1/10 Mbps PCI Home Networking Controller
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C976KC 制造商:Rochester Electronics LLC 功能描述:METRIC PLASTIC QUAD-RING - Bulk
AM79C976KCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller
AM79C976KD 制造商:Advanced Micro Devices 功能描述:ETHERNET:MEDIA ACCESS CONTROLLER (MAC)
AM79C976KF 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP
AM79C976KI 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*