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XPC850CZT50B-XPC850DECZT50B-XPC850DEZT50B-XPC850DEZT66B-XPC850SRCZT50B-XPC850SRZT50B-XPC850SRZT80B-XPC850ZT50B-XPC850ZT66B
50MHz; V(ddh): -0.3 to +4V; communication controller
This document contains detailed information on power considerations, AC/DC electrical
characteristics, and AC timing specifications for revision A,B, and C of the MPC850.
This document contains the following topics:
Topic PagePart I, “Overview” 1
Part II, “Features” 3
Part III, “Electrical and Thermal Characteristics” 7
Part IV, “Thermal Characteristics” 8
Part V, “Power Considerations” 9
Part VI, “Bus Signal Timing” 10
Part VII, “IEEE 1149.1 Electrical Specifications” 37
Part VIII, “CPM Electrical Characteristics” 39
Part IX, “Mechanical Data and Ordering Information” 61
Part X, “Document Revision History” 67
Part I OverviewThe MPC850 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, is specifically designed for cost-sensitive, remote-access, and telecommunications
applications. It is provides functions similar to the MPC860, with system enhancements such
as universal serial bus (USB) support and a larger (8-Kbyte) dual-port RAM.
In addition to a high-performance embedded MPC8xx core, the MPC850 integrates system
functions, such as a versatile memory controller and a communications processor module
(CPM) that incorporates a specialized, independent RISC communications processor
(referred to as the CP). This separate processor off-loads peripheral tasks from the embedded
MPC8xx core.
The CPM of the MPC850 supports up to seven serial channels, as follows: One or two serial communications controllers (SCCs). The SCCs support Ethernet,
ATM (MPC850SAR), HDLC and a number of other protocols, along with a
transparent mode of operation.
