Freescale Semiconductor MPC8260 - Manual (Page 1010)

ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
30-90 Freescale Semiconductor
30.13.3 ATM Event Register (FCCE)/Mask Register (FCCM)
The FCCE register is the ATM controller event register when the FCC operates in ATM mode. When it
recognizes an event, the ATM controller sets the corresponding FCCE bit. Interrupts generated by this
register can be masked in FCCM. FCCE is memory-mapped and can be read at any time. Bits are cleared
by writing ones to them; writing zeros has no effect. Unmasked bits must be cleared before the CP clears
the internal interrupt request.
FCCM is the ATM controller mask register. The FCCM has the same bit format as FCCE. Setting an
FCCM bit enables and clearing a bit masks the corresponding interrupt in the FCCE.
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.
28 RUMP Receive UTOPIA multiple PHY mode.
0 Receive UTOPIA single PHY mode is selected
1 Receive UTOPIA multiple PHY mode is selected (Use this mode for IMA support
1 )
29 HECI HEC included. Used in UDC mode only.
0 HEC octet is not included when UDC mode is enabled.
1 HEC octet is included when UDC mode is enabled.
30 HECC Receive HEC check
0 Do not check Rx HEC
1 Check Rx HEC. HEC errors are reported in UTOPIAE counter (see
Section 30.10.7, “UNI
Statistics Table ”). This option can be used only in UTIPIA 8-bit data bus size.
31 COS Coset mode enable
0 Check Rx HEC with no COSET
1 Check Rx HEC with COSET mode enabled
1
MPC8264 and MPC8266 only.
Table 30-47. FCC ATM Mode Register (FPSMR) (continued)
Bits Name Description