AM79C978VCSLASHW datasheet(100/261 Pages) AMD

部件名	AM79C978VC/W

功能描述	Single-Chip 1/10 Mbps PCI Home Networking Controller

PDF	261 Pages

Scroll/Zoom	100%

制造商	AMD [Advanced Micro Devices]

网页	http://www.amd.com

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100 / 261 page

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Am79C978

Auto-Negotiation goes further by providing a message-

based communication scheme called Next Pages be-

fore connecting to the Link Partner. This feature is not

supported in the Am79C978 device unless the DANAS

(BCR32, bit 10) is selected.

Soft Reset Function

The PHY Control Register (TBR0) incorporates the soft

reset function (bit 15). It is a read/write register and is

self-clearing. Writing a 1 to this bit causes a soft reset.

When read, the register returns a 1 if the soft reset is

still being performed; otherwise, it is cleared to 0. Note

that the register can be polled to verify that the soft

reset has terminated. Under normal operating condi-

tions, soft reset will be finished in 150 clock cycles.

Soft reset only resets the 10BASE-T PHY unit registers

to default values (some register bits retain their previ-

ous values). Refer to the individual registers for values

after a soft reset. Soft reset does not reset the manage-

ment interface.

AM79C978VC/W 数据表(PDF) 100 Page - Advanced Micro Devices