LAN9730 datasheet(74/222 Pages) MICROCHIP

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LAN9730 데이터시트(PDF) 74 Page - Microchip Technology

부품명	LAN9730

상세설명	High-Speed Inter-Chip USB 2.0 to 10/100 Ethernet Controller

PDF	222 Pages

Scroll/Zoom	100%

제조업체	MICROCHIP [Microchip Technology]

홈페이지	http://www.microchip.com

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74 / 222 page

LAN9730/LAN9730i

DS00001946A-page 74

 2012-2015 Microchip Technology Inc.

Figure 4-16 illustrates the use of a pre-pended checksum preamble when transmitting an Ethernet frame consisting of

3 payload buffers.

FIGURE 4-16:

TX EXAMPLE ILLUSTRATING A PRE-PENDED TX CHECKSUM PREAMBLE

TX Command 'A'

Pad DWORD 1

TX Command 'A'

TX Command 'B'

10-Byte

End Offset Padding

Payload Fragment 2

TX Command 'A'

TX Command 'B'

Data Written to the

Device

Payload Fragment 3

TX Command 'A'

TX Command 'B'

TX Checksum Preamble

Note: The TX Checksum Preamble is

pre-pended to data to be transmitted.

FS is set in TX Command 'A' and CK is

set in TX Command 'B'. No start offset

may be added. FS must not be set for

subsequent fragments of the same

packet.

TX Command 'B'

Payload Fragment 1

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