參數(shù)資料
型號: AM79C974
廠商: Advanced Micro Devices, Inc.
英文描述: PCnetTM-SCSI Combination Ethernet and SCSI Controller for PCI Systems
中文描述: PCnetTM -的SCSI結(jié)合以太網(wǎng)和SCSI控制器PCI系統(tǒng)
文件頁數(shù): 25/153頁
文件大?。?/td> 838K
代理商: AM79C974
P R E L I M I N A R Y
AMD
25
Am79C974
Miscellaneous
RESERVED
Reserved_DO NOT CONNECT
Input
This pin (#116) is reserved for internal test logic. It
MUST NOT BE CONNECTED
to anything for proper
chip operation. It’s use is subject to change in future
products.
Power Supply Pins
Analog Power Supply Pins
AV
DD
Analog Power (4 Pins)
Power
There are four analog +5 V supply pins. Special atten-
tion should be paid to the printed circuit board layout to
avoid excessive noise on these lines. Refer to
AppendixC and the Technical Manual(PID #18738A)
for details.
AV
SS
Analog Ground (2 Pins)
Power
There are two analog ground pins. Special attention
should be paid to the printed circuit board layout to avoid
excessive noise on these lines. Refer to Appendix C and
the Technical Manual(PID #18738A) for details.
Digital Power Supply Pins
V
DD
/
DV
DD
Digital Power (5 Pins)
Power
There are 5 power supply pins that are used by the inter-
nal digital circuitry. All V
DD
pins must be connected to a
+5 V supply.
V
DDB
/
V
DDB
I/O Buffer Power (5 Pins)
Power
There are 5 power supply pins that are used by the PCI
bus Input/Output buffer drivers. All V
DDB
pins must be
connected to a +5 V supply.
V
SS
/
DV
SS
Digital Ground (9 Pins)
Ground
There are 9 ground pins that are used by the internal
digital circuitry.
V
SSB
/
V
SSBS
I/O Buffer Ground (11 Pins)
Ground
There are 11 ground pins that are used by the PCI bus
Input/Output buffer drivers.
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