mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 840

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Communication Processor Module
16.11.5.1 DISABLING THE ENTIRE SMCx TRANSMITTER. Follow these steps to fully
enable or disable the SMCx transmitter:
16.11.5.2 DISABLING PART OF THE SMCx TRANSMITTER. Follow this shorter
sequence if you prefer to reinitialize the transmit parameters to the state they were in after
reset.
16.11.5.3 DISABLING THE ENTIRE SMCx RECEIVER. Follow these steps to fully enable
or disable the receiver:
1. Issue the STOP TRANSMIT command. This command is recommended when a serial
2. Clear the TEN bit in the SMCMR. This disables the SMCx transmitter and puts it in a
3. Modify the SMCx transmit parameters, including the parameter RAM. If you prefer to
4. Issue the RESTART TRANSMIT command. You must do this if you did not issue the
5. Set the TEN bit in the SMCMR. When the R bit is set in the TX buffer descriptor,
1. Clear the TEN bit in the SMCMR.
2. Issue the INIT TX PARAMETERS command and make any additional modifications.
3. Set the TEN bit in the SMCMR.
1. Clear the REN bit in the SMCMR. Reception is aborted immediately, which disables
2. Modify the SMCx receive parameters, including the parameter RAM. If you prefer to
3. Issue the CLOSE RX BD command. You must do this if you did not issue the INIT RX
4. Set the REN bit in the SMCMR. When the E bit is set in the RX buffer descriptor,
management controller is transmitting data since it stops transmission smoothly. This
command is not required if a serial management controller is not transmitting, if you
overwrite the TBPTR or if you execute the INIT TX PARAMETERS command.
reset state.
switch protocols or restore the SMCx transmit parameters to their initial state, issue
the INIT TX PARAMETERS command.
INIT TX PARAMETERS command in step 3.
transmission begins using the TX buffer descriptor indicated by the TBPTR value.
the SMCx receiver and puts it in a reset state.
switch protocols or restore the SMCx receive parameters to their initial state, issue the
INIT RX PARAMETERS command.
PARAMETERS command in step 2.
reception begins immediately using the RX buffer descriptor indicated by the RBPTR.
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
MOTOROLA