ST802RT1A 데이터 시트보기 (PDF) - STMicroelectronics

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ST802RT1A

10/100 real-time Ethernet 3.3 V transceiver

STMicroelectronics 

Registers and descriptors description

ST802RT1A, ST802RT1B

Table 27. RN1C [0d28, 0x1C]: 10Base-T error and general status register

Bit Bit name

Description

Default

RW

Type

Type

15:14 RESERVED ---

00

RW

-

13

MDIX Status

1 -> MDI-X configuration used

0 -> MDI configuration used

0

RO

-

12

MDIX Swap

1 -> MDIX force (if not in fx_mode)

0 -> Normal operation

11

MDIX Disable

1 -> MDIX auto-detection and negotiation disabled

0 -> MDI-MDIX auto-detection enabled

0

RW

-

1

RW

-

10 RESERVED ---

0

1 -> Jabber condition detected

0 -> No jabber condition detected.

9 Jabber detect Set at jabber condition detection, cleared only after register read 0

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

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

RO P(LH)

RO LH

8

Polarity 1 -> Polarity changed event

Changed 0 -> No polarity changes

7:0 RESERVED ---

0

RO

-

001001

11b

RO

-

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.

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Doc ID 17049 Rev 1

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