MPC8280 datasheet(626/1386 Pages) FREESCALE

626 / 1386 page

CPM Multiplexing

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

16-14

Freescale Semiconductor

Table 16-5 describes CMXFCR fields.

Field

—

FC1

RF1CS

TF1CS

FC2

RF2CS

TF2CS

Reset

0000_0000_0000_0000

R/W

Addr

0x11B04

Field

—

FC3

RF3CS

TF3CS

—

Reset

0000_0000_0000_0000

R/W

Addr

0x11B06

Figure 16-10. CMX FCC Clock Route Register (CMXFCR)

Table 16-5. CMXFCR Field Descriptions

Bits

Name

Description

—

Reserved, should be cleared

FC1

Defines the FCC1 connection

0 FCC1 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 FCC1 is connected to the TSA of the SIs. The NMSIx pins are available for other purposes.

2–4

RF1CS Receive FCC1 clock source (NMSI mode). Ignored if FCC1 is connected to the TSA (FC1 = 1).

000 FCC1 receive clock is BRG5.

001 FCC1 receive clock is BRG6.

010 FCC1 receive clock is BRG7.

011 FCC1 receive clock is BRG8.

100 FCC1 receive clock is CLK9.

101 FCC1 receive clock is CLK10.

110 FCC1 receive clock is CLK11.

111 FCC1 receive clock is CLK12.

5–7

TF1CS

Transmit FCC1 clock source (NMSI mode). Ignored if FCC1 is connected to the TSA (FC1 = 1).

000 FCC1 transmit clock is BRG5.

001 FCC1 transmit clock is BRG6.

010 FCC1 transmit clock is BRG7.

011 FCC1 transmit clock is BRG8.

100 FCC1 transmit clock is CLK9.

101 FCC1 transmit clock is CLK10.

110 FCC1 transmit clock is CLK11.

111 FCC1 transmit clock is CLK12.

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