CPM Multiplexing
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
16-2 Freescale Semiconductor

Figure 16-1. CPM Multiplexing Logic (CMX) Block Diagram

16.1 Features

The NMSI mode supports the following:

Each FCC, SCC, and SMC can be programmed independently to work with a serial device’s own

set of pins in a non-multiplexed manner.

Each FCC can be connected to its own MII (media-independent interface).

FCC1 can also be connected to an 8- or 16-bit ATM UTOPIA level-2 interface (not on the

MPC8250).

FCC2 can also be connected also to an 8-bit ATM UTOPIA level-2 interface (not on the

MPC8250).

FCC2 can also be connected also to the TC layer (MPC8264 and MPC8266 only).

Time-Slot Assigner
SI
x
R clocks
T clocks
R sync
T sync
TDM A
x
, B
x
, C
x
, D
x
Pins
Strobes
Register Bus
TDM A
x
, B
x
, C
x
, D
x
Tx
Tx
SMC1
Nonmultiplexed Serial Interface (NMSI) Pins
Rx
Rx
Clocks
CPM MUX
BRGs
To Serials:
UTOPIA
Address
Register 2
(CMXUAR)
SMC
Clock
Register
(CMXSMR)
SCC
Clock
Register
(CMXSCR)
FCC
Clock
Register
(CMXFCR)
SI
x
Clock
Registers
(CMXSI
x
CR)
SMC1
MCCs MUX
MII3
FCC3
MUX
MII2/
FCC2
MUX
MII1/
FCC1
MUX
SCC4
SCC4
MUX
SCC3
SCC3
MUX
SCC2
SCC2
MUX
SCC1
SCC1
MUX
SMC2
SMC2
MUX
UTOPIA
8/16 2UTOPIA
82
MUX
TC Layer1 (Option for FCC2 Only)
Note:
1 MPC8264 and MPC8266 only.
2 Not on MPC8250.