ST802RT1B datasheet(27/58 Pages) STMICROELECTRONICS

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ST802RT1A, ST802RT1B

Registers and descriptors description

Doc ID 17049 Rev 1

27/58

Next page: Indicates whether this is the last next page.

Msg page: Differentiates a message page from an unformatted page.

Ack2: Indicates that link partner has the ability to comply with the message.

Toggle: Used by the arbitration function to ensure synchronization with the link partner

during next page exchange.

Message code field: An 11-bit wide field, encoding 2048 possible messages.

Unformatted code field: An 11-bit wide field, which may contain an arbitrary value.

Table 19.

RN10 [0d16, 0x10]: RMII-TEST control register

Bit

Bit name

Description

Default

type

Type

15:14

RESERVED

---

000b

RESERVED

---

000b

12:11

RESERVED

---

10b

RESERVED

---

MII Enable

1 -> MII enabled

0 -> MII disabled, RMII enabled [see bit 10]

Strap

8:6

RESERVED

---

000b

FEF Enable

1 -> Far end fault enabled (only if auto-negotiation is

disabled)

0 -> Far end fault not enabled

0RW

4:3

RESERVED

---

00b

FIFO-Extended

1 -> Extended FIFO mechanism for RMII enabled

0 -> Normal operation

This bit extends elasticity buffer size in RMII interface

0RW

RMII_OOBS

1 -> Out-of-band signaling enabled

0 -> Normal operation

To transfer no-TX/RX information (i.e. speed, link, duplex

mode) when TX_EN/CRS_DV are de-asserted (RMII 1.2)

0RW

RESERVED

---

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