DM9102DEP datasheet(45/70 Pages) DAVICOM

45 / 70 page

Final

Version: DM9102D-DS-F01

May 10, 2006

Bit 1: FUE, FIFO Underrun Error

It is set to indicate that the transmission aborted due to

transmit FIFO underrun condition.

Bit 0: DF, Deferred

It is set to indicate that the frame is deferred before ready to

transmit.

TDES1: Transmit buffer control and buffer size

21 ~ 11

10 ~ 0

FMB1 SETF CAD

///

PD FMB0

Buffer Length

Bit 31: CI, Completion Interrupt

It is set to enable transmit interrupt after the present frame

has been transmitted. It is valid only when TDES1<30> is

set or when it is a setup frame.

Bit 30: ED, Ending Descriptor

It is set to indicate the pointed buffer contains the last

segment of a frame.

Bit 29: BD, Begin Descriptor

It is set to indicate the pointed buffer contains the first

segment of a frame.

Bit 28: FMB1, Filtering Mode Bit 1

This bit is used with FMB0 to indicate the filtering type when

the present frame is a setup frame.

Bit 27: SETF, Setup Frame

It is set to indicate the current frame is a setup frame.

Bit 26: CAD, CRC Append Disable

It is set to disable the CRC appending at the end of the

transmitted frame. Valid only when TDES1<29> is set.

Bit 24: CE, Chain Enable

Must be “1”.

Bit 23: PD, Padding Disable

This bit is set to disable the padding field for a packet shorter

than 64 bytes.

Bit 22: FMB0, Filtering Mode Bit 0

This bit is used with FMB1 to indicate the filtering type when

the present frame is a setup frame.

FMB1

FMB0

Filtering Type

Perfect Filtering

Hash Filtering

Inverse Filtering

Hash-Only Filtering.

Bit 21: IP Packet Checksum Generation

This bit is set to enable the IP packet checksum generation,

if per-packet checksum in CR15 bit 31 is enabled

Bit 20: TCP Packet Checksum Generation

This bit is set to enable the TCP packet checksum

generation, if per-packet checksum in CR15 bit 31 is

enabled.

Bit 19: UDP Packet Checksum Generation

This bit is set to enable the UDP packet checksum

generation, if per-packet checksum in CR15 bit 31 is

enabled.

Bit 10-0: Buffer 1 length

Indicates the size of buffer in Chain type structure.

TDES2: Buffer Starting Address indicates the physical starting address of buffer.

Buffer Address 1

TDES3: Address indicates the next descriptor starting address

Indicates the physical starting address of the chained descriptor under the Chain descriptor structure.

This address must be eight-word alignment.

DM9102DEP датащи(PDF) 45 Page - Davicom Semiconductor, Inc.

DM9102DEP датащи(HTML) 45 Page - Davicom Semiconductor, Inc.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70

датащи скачать

ссылки URL