ST802RT1B datasheet(34/58 Pages) STMICROELECTRONICS

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Registers and descriptors description

ST802RT1A, ST802RT1B

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Doc ID 17049 Rev 1

MDIX status: This bit indicates whether MDI or MDIX is in use.

MDIX swap: Setting this bit forces the device to MDIX. When this bit is 0, the MDIX status is

determined by auto-negotiation if auto-MDIX is enabled.

MDIX disable: Setting this bit disables auto-detection and negotiation of MDIX. Clearing this

bit enables auto-MDIX.

Table 27.

RN1C [0d28, 0x1C]: 10Base-T error and general status register

Bit

Bit name

Description

Default

Type

15:14

RESERVED

---

MDIX Status

1 -> MDI-X configuration used

0 -> MDI configuration used

0RO

MDIX Swap

1 -> MDIX force (if not in fx_mode)

0 -> Normal operation

0RW

MDIX Disable

1 -> MDIX auto-detection and negotiation disabled

0 -> MDI-MDIX auto-detection enabled

1RW

RESERVED

---

P(LH)

Jabber detect

1 -> Jabber condition detected

0 -> No jabber condition detected.

Set at jabber condition detection, cleared only after register read

(if no more jabber condition is present). Fixed to 0 in 100Base-X

modes. Same as RN01[1] and RN19[0]

0RO

Polarity

Changed

1 -> Polarity changed event

0 -> No polarity changes

0RO

7:0

RESERVED

---

001001

11b

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