DP83901AV datasheet(60/62 Pages) NSC

tên linh kiện	DP83901AV

Giải thích chi tiết về linh kiện	Serial Network Interface Controller

PDF	62 Pages

Scroll/Zoom	100%

nhà sản xuất	NSC [National Semiconductor (TI)]

Trang chủ	http://www.national.com

Logo

60 / 62 page

150 Switching Characteristics AC Specs DP83901A Note All Timing is Preliminary (Continued)

Remote DMA (Write Cycle) Recovery Time

TLF10469 – 44

Symbol

Parameter

Min

Max

Units

bprqh

Bus Clock to Port Request High (Note 1)

wprql

WACK to Port Request Low

wackw

WACK Pulse Width

bprdl

Bus Clock to Port Read Low (Note 2)

bprdh

Bus Clock to Port Read High

wprq

Remote Write Port Request to Port

BSCK

Request Time (Notes 3 4 5)

Note 1

The first port request is issued in response to the remote write command It is subsequently issued on T1 clock cycles following completion of remote

DMA cycles

Note 2

The start of the remote DMA write following WACK is dependent on where WACK is issued relative to BSCK and whether a local DMA is pending

Note 3

Assuming wackw k 1 BSCK and no local DMA interleave no CS immediate BACK and WACK goes high before T4

Note 4

WACK must be high for a minimum of 7 BSCK

Note 5

This is not a measured value but guaranteed by design

DP83901AV bảng dữ liệu(PDF) 60 Page - National Semiconductor (TI)