MPC850/D
(Motorola Order Number)
1/98
Rev 1
™
Advance Information
MPC850 Integrated Communications Microprocessor
Technical Summary
The MPC850 integrated communications microprocessor is a versatile, one-chip integrated microprocessor
and peripheral combination that can be used in a variety of controller applications, excelling particularly in
communications and networking products. The MPC850, which includes support for Ethernet and
Asynchronous Transfer Mode (ATM), was specifically designed for cost-sensitive remote access, xDSL and
telecom applications. As a low-cost implementation of the MPC860, it provides excellent
price/performance, along with system enhancements such as Universal Serial Bus (USB) support and a
larger dual-port RAM (8KB).
The CPM of the MPC850 supports up to seven serial channels — one or two serial communication
controllers (SCCs), one USB channel, two serial management controllers (SMCs), one I2C port, and one
serial peripheral interface (SPI). The SCCs are capable of supporting Ethernet, ATM, HDLC and a number
of other protocols, along with a transparent mode of operation. In addition, up to 64 logical HDLC channels
can be supported on a single SCC.
MPC850 Family Members:
MPC850SE
One SCC supporting only Ethernet; No USB support
MPC850
One SCC + USB (the SCC supports multiple protocols including Ethernet)
MPC850DC
Two SCCs + USB (one SCC supports Ethernet)
MPC850DE
Two SCCs + USB (Both SCCs support Ethernet)
MPC850DH
Two SCCs + USB (Both SCCs support Ethernet and multichannel HDLC)
MPC850SAR
Two SCCs + UTOPIA + USB (Both SCCs support Ethernet, multichannel
HDLC and ATM)
To locate any published errata or updates for this document, please refer to our Web site at
http://www.mot.com/SPS/RISC/netcomm.
This document contains information on a new product under development by Motorola.
Motorola reserves the right to change or discontinue this product without notice.
© Motorola Inc. 1998. All rights reserved.
MPC850 Technical Summary
In addition to a high-performance embedded PowerPC core, the MPC850 integrates many system functions
including a versatile memory controller and a communication processor module (CPM) that uses a
specialized, independent RISC processor for communications. This two-processor architecture is more
efficient than traditional architectures because the CPM off-loads peripheral tasks from the embedded
PowerPC core.
