MTD800 データシートの表示（PDF） - Myson Century Inc

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MTD800

Integrated Fast Ethernet Controller

Myson Century Inc 

MYSON

TECHNOLOGY

MTD 800

(Preliminary)

Bit

15

14

13

12

11

10- 8

7

6

5

4

3

Symbol

RxS

EIEN

RFCEN

NDFA

RBLEN

Description

Receive Status. When “1”, indicates the receive process is running.

When “0”, indicate the receive process is stopped. This is a read-only bit

and the default value is “0”.

Early Interrupt Enable. When set, the chip will work under early interrupt

mode. When cleared, it will operate in normal interrupt mode. The default

value is “0”.

Receive Flow Control packet Enable. When set, the flow control packet

will be recognized during full duplex operation. When cleared, it will be

considered as a normal packet. The default value is “0”, but may be

changed by loading from EEPROM.

Not Defined Flow control Address. For the legacy flow control device, a

802.3x special DA was not defined at that time. For the reason of back-

ward compatibility, only the length/type field is checked when this bit is

set. The default value is “0”.

Receive Burst Length Enable. When set, the receive burst transaction will

use the following receive programmable burst length. When cleared, the

PBL defined in the bus command register will be adopted. The default

value is “1”.

Receive Programmable Burst Length

RPBL2 RPBL1 RPBL0 Length

0

0

0

1 words

0

0

1

4

0

1

0

8

RPBL[2:0] 0

1

1

16

1

0

0

32

1

0

1

64

1

1

0

128

1

1

1

512

PROM

AB

AM

ARP

The default value is “011”.

Promiscuous Mode Bit. If PROM equals to 1, all valid packets with any

physical destination address are accepted. If PROM equals to 0, the

physical address of incoming packet must match the node address pro-

grammed in the PAR0 ~ 5, otherwise it will be rejected. The default value

is “0”.

Accept Broadcast Bit. If AB equals to 1, all packets with broadcast desti-

nation address are accepted. If AB equals to 0, any packet with broadcast

address is rejected. The default value is “1”.

Accept Multicast Bit. If AM equals to 1, all packets with desired multicast

destination address are accepted. If AM equals to 0, any packet with mul-

ticast address is rejected. The default value is “1”.

Reserved.

Accept Runt Packet. If ARP equals to 1, all packets with their length less

than 64 bytes are accepted. If ARP equals to 0, any packet whose length

is less than 64 bytes is rejected. The default value is “0”.

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MTD800 Revision 0.0 07/20/1999

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