mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 614

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

Communication Processor Module
16.9.1 Features
The following is a list of the serial communication controllers’ main features:
• Implements the HDLC, HDLC bus, asynchronous HDLC, synchronous start/stop,
• Supports full 10Mbps Ethernet/IEEE 802.3
• A single HDLC or transparent channel can be supported at 8Mbps (full duplex)
• Maximum clocking rates of 12.5MHz at 25MHz
• DPLL circuitry for clock recovery with NRZ, NRZI, FM0, FM1, Manchester, and
• Clocks can be derived from a baud rate generator, an external pin, or DPLL; data clock
• Supports automatic control of the RTSx, CTSx, and CDx modem signals
• Multibuffer data structure for receive and transmit (up to 512 buffer descriptors can be
• Deep FIFOs
• Transmit-on-demand feature decreases time-to-frame transmission
• Low FIFO latency option for transmit and receive in character-oriented and totally
• Frame preamble options
• Full-duplex operation
• Fully transparent option for receiver/transmitter while another protocol executes on the
• Echo and local loopback modes for testing
asynchronous start/stop, AppleTalk, Transparent, and Ethernet protocols
Differential Manchester (also known as Differential Bi-phase-L)
can be as high as 3.125MHz with a 25MHz clock
partitioned in any way)
transparent protocols
transmitter/receiver
Note: The serial communication controllers are the same on the MPC821 and
MPC823, except that the MPC823’s SCC2 supports a wider range of IrDA
signaling rates. The register control bits have been removed so the SIR and IRP
bits of the GSMR_H and GSMR_L are reserved on the MPC823. However, the
MPC823 does not support the BISYNC protocol or the external
content-addressable memory (CAM) for the Ethernet/IEEE 802.3 protocol.
Freescale Semiconductor, Inc.
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
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