MPC8280 datasheet(627/1386 Pages) FREESCALE

627 / 1386 page

CPM Multiplexing

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

16-15

8–9

FC2

Defines the FCC2 connection.

00 FCC2 is not connected to the TSA and is either connected directly to the NMSIx pins or is not

used. The choice of general-purpose I/O port pins versus FCCn pins is made in the parallel I/O

control register.

01 FCC2 is connected to the TSA of the SIs. The NMSIx pins are available for other purposes.

10 FCC2 is connected to the TC layer (MPC8280 only). The NMSIx pins are available for other

purposes.

11 Reserved

10–12

RF2CS Receive FCC2 clock source (NMSI mode). Ignored if FCC2 is connected to the TSA (FC2 = 01).

000 FCC2 receive clock is BRG5.

001 FCC2 receive clock is BRG6.

010 FCC2 receive clock is BRG7.

011 FCC2 receive clock is BRG8.

100 FCC2 receive clock is CLK13.

101 FCC2 receive clock is CLK14.

110 FCC2 receive clock is CLK15.

111 FCC2 receive clock is CLK16.

13–15

TF2CS

Transmit FCC2 clock source (NMSI mode). Ignored if FCC2 is connected to the TSA (FC2 = 01).

000 FCC2 transmit clock is BRG5.

001 FCC2 transmit clock is BRG6.

010 FCC2 transmit clock is BRG7.

011 FCC2 transmit clock is BRG8.

100 FCC2 transmit clock is CLK13.

101 FCC2 transmit clock is CLK14.

110 FCC2 transmit clock is CLK15.

111 FCC2 transmit clock is CLK16.

—

Reserved, should be cleared

FC3

Defines the FCC3 connection

0 FCC3 is not connected to the TSA and is either connected directly to the NMSIx pins or is not

used. The choice of general-purpose I/O port pins versus FCCn pins is made in the parallel I/O

control register.

1 FCC3 is connected to the TSA of the SIs. The NMSIx pins are available for other purposes.

18–20

RF3CS Receive FCC3 clock source (NMSI mode). Ignored if FCC3 is connected to the TSA (FC3 = 1).

000 FCC3 receive clock is BRG5.

001 FCC3 receive clock is BRG6.

010 FCC3 receive clock is BRG7.

011 FCC3 receive clock is BRG8.

100 FCC3 receive clock is CLK13.

101 FCC3 receive clock is CLK14.

110 FCC3 receive clock is CLK15.

111 FCC3 receive clock is CLK16.

Table 16-5. CMXFCR Field Descriptions (continued)

Bits

Name

Description

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