mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 649

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

16.9.14.3 DISABLING THE ENTIRE SCCx RECEIVER. The SCCx receiver can be fully
disabled or enabled by following these steps:
16.9.14.4 DISABLING PART OF THE SCCx RECEIVER. To reinitialize the SCCx
receiver to the state it was in after reset, follow this short sequence of steps:
16.9.14.5 SWITCHING PROTOCOLS. Sometimes you may want to switch the protocol
that a serial communication controller is executing without resetting the board. You can use
one command and the following sequence of steps:
1. Clear the ENR bit in the GSMR_L to disable the SCCx receiver and put it in a reset
2. Make modifications to the SCCx receive parameters or to the parameter RAM. If you
3. Issue the ENTER HUNT MODE command in the CPCR. This command is required if
4. Set the ENR bit in the GSMR_L. Reception begins using the RX buffer descriptor that
1. Clear the ENR bit in the GSMR_L.
2. Issue the INIT RX PARAMETERS command in the CPCR and make any additional
3. Set the ENR bit in the GSMR_L.
1. Clear the ENT and ENR bits in the GSMR_L.
2. Issue the INIT TX AND RX PARAMS command in the CPCR. This command
3. Set the ENT and ENR bits in the GSMR_L and the serial communication controller is
state.
want to switch protocols or restore the SCCx receive parameters to their initial state,
issue the INIT RX PARAMETERS command.
the INIT RX PARAMETERS command was not issued in step 2.
the RBPTR points to if the E bit is set in the TX buffer descriptor.
modifications.
initializes both the transmit and receive parameters. Any additional modifications can
be made in the GSMR_L.
enabled with the new protocol.
Tip:
communication controllers.
You can save power by clearing the ENT and ENR bits of the serial
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Communication Processor Module
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