EZ80F91MCU Datasheet, PDF (330/396 Pages) Zilog, Inc. – eZ80Acclaim-TM Flash Microcontrollers

eZ80F91 MCU
Product Specification
311
On-Chip Instrumentation
Introduction to On-Chip Instrumentation
On-Chip Instrumentation¹ (OCI™) for the eZ80^® CPU core enables powerful
debugging features. The OCI provides run control, memory and register visibility,
complex break points, and trace history features.
The OCI employs all of the functions of the ZiLOG Debug Interface (ZDI) as
described in the ZDI section. It also adds the following debug features:
• Control via a 4-pin JTAG port that conforms to IEEE Standard 1149.1 (Test
Access Port and Boundary Scan Architecture)
• Complex break point trigger functions
• Break point enhancements, such as the ability to:
– Define two break point addresses that form a range
– Break on masked data values
– Start or stop trace
– Assert a trigger output signal
• Trace history buffer
• Software break point instruction
There are four sections to the OCI:
• JTAG interface
• ZDI debug control
• Trace buffer memory
• Complex triggers
This document contains information to activate the OCI for JTAG boundary scan
register operations. For additional information regarding OCI features, or to order
OCI debug tools, please contact:
First Silicon Solutions, Inc.
5440 SW Westgate Drive, Suite 240
Portland, OR 97221
Phone: [phone]
Fax: [phone]
www.fs2.com
1. On-Chip Instrumentation and OCI are trademarks of First Silicon Solutions,
Inc.
PS019209-0504
PRELIMINARY
On-Chip Instrumentation