MPC8280 datasheet(1047/1386 Pages) FREESCALE

1047 / 1386 page

ATM Controller and AAL0, AAL1, and AAL5

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

31-87

11–15

LAST

PHY/

PHY ID

Last PHY. (Multiple PHY master mode only.) The UTOPIA interface polls all PHYs starting from

PHY address 0 and ending with the PHY address specified in LAST PHY. (The number of active

PHYs are LAST PHY+1). LAST PHY should be specified in both single-Clav and direct-polling

modes.

PHY ID. (Multiple PHY slave mode only.) Determines the PHY address of the ATM controller

when configured as a slave in a multiple PHY ATM port.

Note: For IMA1 support this field must be programmed to the PHY address of the last PHY

device; it is unrelated to the “virtual PHY number” for the IMA group programmed into

VPHYNUM.

16–17

—

Reserved, should be cleared.

TPRI

Transmitter priority. Used to adjust the default priority of the FCC transmitter. It is strongly

recommended to set TPRI when in multi-PHY mode, or in single-PHY mode if the maximal bit

rate (either internal or external rate) is higher than that of the other FCCs; for other modes, it

should remain cleared.

0 Default operation

1 Prevents elevation to emergency mode

Refer to Table 14-2.

TUDC

Transmit user-defined cells

0 Regular 53-byte cells (Disable this mode for IMA support1)

1 User-defined cells

RUDC

Receive user-defined cells

0 Regular 53-byte cells (Disable this mode for IMA support1)

1 User-defined cells

RxP

Receive parity check.

0 Check Rx parity line

1 Do not check Rx parity line

TUMP

Transmit UTOPIA multiple PHY mode

0 Transmit UTOPIA single PHY mode is selected

1 Transmit UTOPIA multiple PHY mode is selected (Use this mode for IMA support1)

—

Reserved, should be cleared.

TSIZE

Transmit UTOPIA data bus size

0 UTOPIA 8-bit data bus size

1 UTOPIA 16-bit data bus size

RSIZE

Receive UTOPIA data bus size

0 UTOPIA 8-bit data bus size

1 UTOPIA 16-bit data bus size

UPRM

UTOPIA priority mode.

0 Round robin. Polling is done from PHY zero to the PHY specified in LAST PHY. When a PHY

is selected, the UTOPIA interface continues to poll the next PHY in order.

1 Fixed priority. Polling is done from PHY zero to the PHY specified in LAST PHY. When a PHY

is selected, the UTOPIA interface continues to poll from PHY zero.

UPLM

UTOPIA polling mode.

0 Single Clav polling. Polling is done using Add[4–0] and Clav. Selection is done using

Add[4–0]. Up to 31 PHYs can be polled.

1 Direct polling. Polling is done using Clav[3–0]. Selection is done using Add[1–0]. Up to 4

PHYs can be polled.

Table 31-47. FCC ATM Mode Register (FPSMR) (continued)

Bits

Name

Description

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