83C795 Datasheet, PDF(40/136 Page) List of Unclassifed Manufacturers

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

83C795 Datasheet, PDF (40/136 Pages) List of Unclassifed Manufacturers – Ethernet System Controller

◁

ETHERNET SYSTEM CONTROLLER REGISTERS

83C795

BIT

ERWCNT

7 ERW11

6 ERW10

5 ERW9

4 ERW8

3 ERW7

2 ERW6

1 ERW5

0 ERW4

RESET

5.2.13 INTMASK - Interrupt Mask Register

Normal Map R ead Port = 2:1F Normal Map Write

Port = 0:1F

Linked-List Map R ead Port = 2:1F Linked-Lis t

Write Port = 0:1F

T he Interrupt Mas k R egis ter is us ed to mas k out

certain interrupt s ources s electively. Mas k bits s et

to â1âallowthecorres pondinginterrupts tocaus ean

IR Q. Mas k bits set to â0â block their res pective

interrupt s ources .

5.2.12 GROUP0-GROUP7 - Multicast Filter

Table Registers

GROUP

GROUP0

GROUP1

GROUP2

GROUP3

GROUP4

GROUP5

GROUP6

GROUP7

Normal Map

Port Address

Read Write

1:18 1:18

1:19 1:19

1:1A 1:1A

1:1B 1:1B

1:1C 1:1C

1:1D 1:1D

1:1E 1:1E

1:1F 1:1F

Linked-List Map

Port Address

Read Write

1:18 1:18

1:19 1:19

1:1A 1:1A

1:1B 1:1B

1:1C 1:1C

1:1D 1:1D

1:1E 1:1E

1:1F 1:1F

T hes e 8 registers hold the nodeâs Multicas t filter

table. S ee T able 5-10 for the regis ters â bit

as signments .

BIT

INTMASK

7â

6 ERWE

5 CNTE

4 OVWE

3 TXEE

2 RXEE

1 PTXE

0 PRXE

RESET

Bit 6: ERWE, Early Receive Warning Enable

When E R WE = 1, this bit enables E arly R eceive

Warning as defined by the E R W bit in the Interrupt

S tatus R egis ter. (S ee the next regis ter, INT S T AT.)

Bit 5: CNTE, Counter Overflow Enable

When CNT E = 1, this bit enables Counter Overflow

as defined by the CNT bit in the Interrupt S tatus

R egis ter. (S ee the next regis ter, INT S T AT.)

Bit 4: OVWE, Overwrite Warning Enable

When OVWE = 1, this bit enables Overwrite Warn-

ingas definedby theOVW bit in theInterrupt S tatus

R egis ter. (S ee the next regis ter, INT S T AT.)

GROUP

Registers

GROUP0

GROUP1

GROUP2

GROUP3

GROUP4

GROUP5

GROUP6

GROUP7

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

GA07

GA15

GA23

GA31

GA39

GA47

GA55

GA63

GA06

GA14

GA22

GA30

GA38

GA46

GA54

GA62

GA05

GA13

GA21

GA29

GA37

GA45

GA53

GA61

GA04

GA12

GA20

GA28

GA36

GA44

GA52

GA60

GA03

GA11

GA19

GA27

GA35

GA43

GA51

GA59

GA02

GA10

GA18

GA26

GA34

GA42

GA50

GA58

GA01

GA09

GA17

GA25

GA33

GA41

GA49

GA57

GA00

GA08

GA16

GA24

GA32

GA40

GA48

GA56

TABLE 5-10. GROUP REGISTER BITS

▷