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DS87C550
High-Speed Microcontroller
User’s Guide Supplement
www.dalsemi.com
Section 1:Introduction
This document is provided as a supplement to the High-Speed Microcontrollers User’s Guide, covering
new or modified features specific to the DS87C550.
This document must be used in conjunction with
the High-Speed Microcontroller User’s Guide, available from Dallas Semiconductor.
Addenda are
arranged by section number, which correspond to sections in the High-Speed Microcontroller User’s
Guide.
The following additions and changes, with respect to the High-Speed Microcontroller User’s Guide, are
contained in this document. This document is a work in progress, and updates/additions will be added as
available.
Section 2:Ordering Information
Information on new members of the High-Speed Microcontroller family has been added.
Section 3:Architecture
No Changes. Information containing new architectural features is contained in the DS87C550 data sheet.
Section 4:Programming Model
Descriptions of new and modified Special Function Registers in the DS87C550 have been included.
Section 5:CPU Timing
Descriptions of the clock multiply/divide modes have been added.
Section 6:Memory Access
Information on EPROM size and the DPTR auto-select feature have been added.
Section 7:Power Management
Changes in the power management clock divisor are discussed.
Section 8:Reset Conditions
A discussion of the reset output has been included.
Section 9: Interrupts
The interrupt structure found on the DS87C550 is described.
Section 10:Parallel I/O
Descriptions of the new I/O ports have been added.
Section 11:Programmable Timers
New clock multiply and divide functions added to the DS87C550’s Timers are described.
