mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 833

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mpc823rg

Manufacturer Part Number
mpc823rg
Description
Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
Manufacturer
Freescale Semiconductor, Inc
Datasheet
If the serial management controllers are connected to the TDM, it gets its synchronization
pulse from the time-slot assigner. Otherwise, if a serial management controller is connected
to the NMSI and the Transparent protocol is selected, the serial management controller can
use the SMSYNx pin as a synchronization pin to determine when it must start transmitting
and receiving. The SMSYNx pin is not used, however, when a serial communication
controller is in UART mode.
16.11.1 Features
The following is a list of the serial management controllers’ main features:
16.11.2 General SMCx Mode Register
The operating mode of each serial management controller port is defined by the 16-bit,
memory-mapped, read/write general SMCx mode register (SMCMR). Refer to each specific
SMCx protocol section for information about this register and Table 16-2 (page 16-11) for
specific commands.
16.11.3 SMCx Buffer Descriptor Operation
When the serial management controllers are configured to operate in GCI mode, their
memory structure is predefined as one half-word long for transmit and one half-word long
for receive. For more information on these half-word structures, refer to
Section 16.11.8 The SMCx in GCI Mode .
• Each serial management controller can implement the UART protocol on its own pins
• Each serial management controller can implement a totally Transparent protocol on a
• Each SMCx channel fully supports the circuit interface and monitor channels of the GCI
• Two serial management controllers support the two sets of circuit interface and monitor
• Full-duplex operation
• Local loopback and echo capability for testing
multiplexed or nonmultiplexed line. If SMC2 uses a nonmultiplexed line, the serial
interface time-slot assigner is not available.
(IOM-2) in ISDN applications
channels in the SCIT channels 0 and 1
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Communication Processor Module
16-381

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