- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366550 > AM79C971 (Advanced Micro Devices, Inc.) PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus PDF資料下載
參數(shù)資料
| 型號： | AM79C971 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus |
| 中文描述： | PCnet⑩快速單芯片全雙工10/100 Mbps以太網(wǎng)控制器，PCI總線 |
| 文件頁數(shù)： | 22/265頁 |
| 文件大?。?/td> | 3190K |
| 代理商： | AM79C971 |
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頁當前第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
22
Am79C971
not used,
±
10% accuracy is sufficient for the clock
source.
Note:
When the Am79C971 controller is in coma
mode, there is an internal 22 k
resistor from XTAL1 to
ground. If an external source drives XTAL1, some
power consumption will be consumed driving this resis-
tor. If XTAL1 is driven LOW at this time, power con-
sumption will be minimized. In this case, XTAL1 must
remain active for at least 30 cycles after the assertion
of SLEEP and deassertion of REQ.
XTAL2
Crystal Oscillator Out
The internal clock generator uses a 20-MHz crystal that
is attached to the pins XTAL1 and XTAL2. The network
data rate is one-half of the crystal frequency. If an ex-
ternal clock source is used on XTAL1, then XTAL2
should be left unconnected.
EEPROM Interface
EECS
EEPROM Chip Select
This pin is designed to directly interface to a serial EE-
PROM that uses the 93C46 EEPROM interface proto-
col. EECS is connected to the EEPROM
’
s chip select
pin. It is controlled by either the Am79C971 controller
during command portions of a read of the entire EE-
PROM, or indirectly by the host system by writing to
BCR19, bit 2.
Output
Output
When RST is active, EECS is an input for NAND tree
testing
.
EEDI
EEPROM Data In
This pin is designed to directly interface to a serial
EEPROM that uses the 93C46 EEPROM interface pro-
tocol. EEDI is connected to the EEPROM
’
s data input
pin. It is controlled by either the Am79C971 controller
during command portions of a read of the entire
EEPROM, or indirectly by the host system by writing to
BCR19, bit 0.
Output
Note:
The EEDI pin is multiplexed with the LED0 pin.
When RST is active, EEDI is an input for NAND tree
testing
.
EEDO
EEPROM Data Out
This pin is designed to directly interface to a serial
EEPROM that uses the 93C46 EEPROM interface pro-
tocol. EEDO is connected to the EEPROM
’
s data out-
put pin. It is controlled by either the Am79C971
controller during command portions of a read of the en-
tire EEPROM, or indirectly by the host system by read-
ing from BCR19, bit 0.
Input
Note:
The EEDO pin is multiplexed with the LED3,
MIIRXFRTGD, and SRD pins.
When RST is active, EEDO is an input for NAND tree
testing
.
EESK
EEPROM Serial clock
This pin is designed to directly interface to a serial
EEPROM that uses the 93C46 EEPROM interface pro-
tocol. EESK is connected to the EEPROM
’
s clock pin.
It is controlled by either the Am79C971 controller di-
rectly during a read of the entire EEPROM, or indirectly
by the host system by writing to BCR19, bit 1.
Input/Output
Note:
The EESK pin is multiplexed with the LED1 and
SFBD pins.
The EESK pin is also used during EEPROM Auto-
Detection to determine whether or not an EEPROM is
present at the Am79C971 controller interface. At the
rising edge of the last CLK edge while RST is asserted,
EESK is sampled to determine the value of the EEDET
bit in BCR19. A sampled HIGH value means that an
EEPROM is present, and EEDET will be set to 1. A
sampled LOW value means that an EEPROM is not
present, and EEDET will be set to 0. See the
EEPROM
Auto-Detection
section for more details.
If no LED circuit is to be attached to this pin, then a pull
up or pull down resistor must be attached instead to re-
solve the EEDET setting.
When RST is active, EESK is an input for NAND tree
testing
.
WARNING: The input signal level of EESK must be
valid for correct EEPROM detection before the
deassertion of RST.
Expansion Bus Interface
EBUA_EBA[7:0]
Expansion Bus Upper Address/
Expansion Bus Address [7:0]
The EBUA_EBA[7:0] pins provide the least and most
significant bytes of address on the Expansion Bus. The
most significant address byte (address bits [15:8] dur-
ing SRAM accesses; address bits [19:16] during boot
device accesses) is valid on these pins at the beginning
of an SRAM or boot device access, at the rising edge
of AS_EBOE. This upper address byte must be stored
externally in a D flip-flop. During subsequent cycles of
an SRAM or boot device access, address bits [7:0] are
present on these pins.
Output
All EBUA_EBA[7:0] outputs are forced to a constant
level to conserve power while no access on the Expan-
sion Bus is being performed.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C971KCW | IC LOGIC 16211 24-BIT FET BUS SWITCH -40+85C TSSOP-56 35/TUBE |
| AM79C972BKCW | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972BKIW | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972BVCW | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972 | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C971AKC | 制造商:Advanced Micro Devices 功能描述: |
| AM79C971AVC | 制造商:Advanced Micro Devices 功能描述:10/100 MBPS ETHERNET - Trays |
| AM79C971AVC\\W | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AM79C971AVC\W | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AM79C971AWW WAF | 制造商:Advanced Micro Devices 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。