4 fcc receiver shortcut sequence, 5 switching protocols, 13 saving power – Motorola MPC8260 User Manual
Page 779: Fcc receiver shortcut sequence -21, Switching protocols -21, Saving power -21
MOTOROLA
Chapter 28. Fast Communications Controllers (FCCs)
28-21
Part IV. Communications Processor Module
28.12.4 FCC Receiver Shortcut Sequence
A shorter sequence is possible if the user prefers to reinitialize the receive parameters to the
state they had after reset. This sequence is as follows:
1. Clear GFMR[ENR].
2. Issue the
INIT
RX
PARAMETERS
command. Any additional changes can be made now.
3. Set GFMR[ENR].
28.12.5 Switching Protocols
A user can switch the protocol that the FCC is executing (HDLC) without resetting the
board or affecting any other FCC by taking the following steps:
1. Clear GFMR[ENT] and GFMR[ENR].
2. Issue the
INIT
TX
AND
RX
PARAMETERS
command. This command initializes both
transmit and receive parameters. Additional changes can be made in the GFMR to
change the protocol.
3. Set GFMR[ENT] and GFMR[ENR]. The FCC is enabled with the new protocol.
28.13 Saving Power
Clearing an FCCÕs ENT and ENR bits minimizes its power consumption.