Motorola PowerQUICC II MPC8280 Series Reference Manual page 1107

Table 31-47. FCC ATM Mode Register (FPSMR) (continued)
Bits Name
11–15 LAST Last PHY. (Multiple PHY master mode only.) The UTOPIA interface polls all PHYs starting from
PHY/ PHY address 0 and ending with the PHY address specified in LAST PHY. (The number of active
PHY ID 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 IMA
device; it is unrelated to the "virtual PHY number" for the IMA group programmed into
VPHYNUM.
16–17 — Reserved, should be cleared.
18 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.
19 TUDC Transmit user-defined cells
0 Regular 53-byte cells (Disable this mode for IMA support
1 User-defined cells
20 RUDC Receive user-defined cells
0 Regular 53-byte cells (Disable this mode for IMA support
1 User-defined cells
21 RxP Receive parity check.
0 Check Rx parity line
1 Do not check Rx parity line
22 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 support
23 — Reserved, should be cleared.
24 TSIZE Transmit UTOPIA data bus size
0 UTOPIA 8-bit data bus size
1 UTOPIA 16-bit data bus size
25 RSIZE Receive UTOPIA data bus size
0 UTOPIA 8-bit data bus size
1 UTOPIA 16-bit data bus size
26 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.
27 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.
MOTOROLA Chapter 31. ATM Controller and AAL0, AAL1, and AAL5
Freescale Semiconductor, Inc.
1
support this field must be programmed to the PHY address of the last PHY
For More Information On This Product,
Go to: www.freescale.com
Description
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ATM Registers
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31-93