Motorola MPC823e Reference Manual page 591

R3CS—Receive Clock Source for SCC3
This field is ignored when the SCC3 is connected to the time-slot assigner (SC3 = 1).
000 = SCC3 receive clock is BRG1.
001 = SCC3 receive clock is BRG2.
010 = SCC3 receive clock is BRG3.
011 = SCC3 receive clock is BRG4.
100 = SCC3 receive clock is CLK1.
101 = SCC3 receive clock is CLK2.
110 = SCC3 receive clock is CLK3.
111 = SCC3 receive clock is CLK4.
T3CS—Transmit Clock Source for SCC3
This field is ignored when SCC3 is connected to the time-slot assigner (SC3 = 1).
000 = SCC3 transmit clock is BRG1.
001 = SCC3 transmit clock is BRG2.
010 = SCC3 transmit clock is BRG3.
011 = SCC3 transmit clock is BRG4.
100 = SCC3 transmit clock is CLK1.
101 = SCC3 transmit clock is CLK2.
110 = SCC3 transmit clock is CLK3.
111 = SCC3 transmit clock is CLK4.
GR2—Grant Support of SCC2
0 = SCC2 transmitter does not support the grant mechanism. The grant is always
asserted internally.
1 = SCC2 transmitter supports the grant mechanism as determined by the GMx bit
of the SIMODE register.
SC2—SCC2 Connection
0 = SCC2 is not connected to the multiplexed serial interface but is either connected
directly to the NMSI2 pins or is not used. You can choose either the
general-purpose I/O port pins or dedicated SCC2 pins in the parallel I/O port
registers. See Section 16.14 The Parallel I/O Ports for more information.
1 = SCC2 is connected to the multiplexed serial interface. The NMSI2 receive pins are
available for other purposes.
MOTOROLA MPC823e REFERENCE MANUAL
Communication Processor Module
16-137