DP83858 datasheet(18/37 Pages) NSC

18 / 37 page

http:\\www.national.com

4.4 Page Register (PAGE)

4.5 Partition Status Register (PARTITION)

4.6 Jabber Status Register (JABBER)

4.7 Administration Register (ADMIN)

Page 0

Address 1h

Page 1

Address 1h

Bit

Bit Name Access

Bit Description

D15 - D2 reserved

—

These bits are undeﬁned when read. Must be written as 0.

D1 - D0 PAGE[1:0]

r/w

These bits program the register page to be accessed. The page encoding is as follows:

PAGE[1:0]

Page

(default)

reserved

Page 0

Address 2h

Bit

Bit Name

Access

Bit Description

D15 - D12 reserved

—

These bits are undefined when read.

D11 - D8

reserved

—

These bits are undefined when read.

D7 - D0

JAB[7..0]

read only The respective port's PART bit is set to 1 when Partitioning is sensed on that port.

After reset, these bits are cleared to zero.

Page 0

Address 3h

Bit

Bit Name

Access

Bit Description

D15 - D12 reserved

—

These bits are undeﬁned when read.

D11 - D8

reserved

—

These bits are undefined when read.

D7 - D0

JAB[7..0]

read only The respective port's JAB bit is set to 1 when the Jabber condition is detected on that

port. After reset, these bits are cleared to zero.

Page 0

Address 4h

Bit

Bit Name

Access

Bit Description

D15 - D13 reserved

—

For compatibility with future enhanced versions these bits must be written as

zero. They are undeﬁned when read.

D12

TST_PART_LED

r/w

Test Partition LED: When this bit is set, the corresponding Partition LED logic

will be enabled if any of the ADMIN_DIS bits are set.

D11 - D8

reserved

—

These bits are undefined when read.

D7 - D0

ADMIN_DIS[7] ...

ADMIN_DIS[0]

r/w

Setting these bits to 0 enables the respective port (TX and RX). Writing a 1 to

any bit will disable that port. Note that port enable/disable actions will occur at

the next network idle period. For example, if an ADMIN_DIS bit is cleared dur-

ing an incoming packet, this port will only be enabled after the incoming packet

has ﬁnished. After reset, these bits default to zero (all ports enabled).

DP83858 Datasheet(PDF) 18 Page - National Semiconductor (TI)

DP83858 Datasheet(HTML) 18 Page - National Semiconductor (TI)

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

Datasheet Download

Link URL