E t h e r n e t M o d u l e

MII Management Command register

Address: FF80 0424

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reserved

 

 

 

 

 

 

SPRE

READ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Register bit assignment

Bits

Access

Mnemonic

Reset

Description

 

 

 

 

 

D31:02

N/A

Reserved

N/A

N/A

 

 

 

 

 

D01

R/W

SCAN

0

Automatically scan for read data

 

 

 

 

When this bit is set to 1, the MII management

 

 

 

 

module performs read cycles continuously. This

 

 

 

 

can be useful for monitoring link fail, for example.

 

 

 

 

 

D00

R/W

READ

0

Single scan for read data

 

 

 

 

When this bit is set to 1, the MII management

 

 

 

 

module performs a single read cycle. The read data

 

 

 

 

is returned to the MII Read Data register (see

page 196) after the BUSY bit in the MII Indicators register (see page 197) has returned a value of 0.

Table 71: MII Management Command register bit definition

w w w . d i g i . c o m

1 9 3

Page 207
Image 207
Digi NS7520 manual MII Management Command register bit definition, Automatically scan for read data