EZ80L92MCU Datasheet, PDF (174/241 Pages) Zilog, Inc. – eZ80Acclaim Flash Microcontrollers

eZ80L92 MCU
Product Specification
159
ZiLOG Debug Interface
Introduction
The ZiLOG Debug Interface (ZDI) provides a built-in debugging interface to the eZ80^®
CPU. ZDI provides basic in-circuit emulation features including:
• Examining and modifying internal registers
• Examining and modifying memory
• Starting and stopping the user program
• Setting program and data break points
• Single-stepping the user program
• Executing user-supplied instructions
• Debugging the final product with the inclusion of one small connector
• Downloading code into SRAM
• C source-level debugging using ZiLOG Developer Studio (ZDSII)
The above features are built into the silicon. Control is provided via a two-wire interface
that is connected to the ZPAK II emulator. Figure 35 illustrates a typical setup using a a
target board, ZPAK II, and the host PC running ZiLOG Developer Studio. Refer to the
ZiLOG website for more information about ZPAK II and ZDS II.
ZiLOG
Developer
Studio
ZPAK
Emulator
Target Board
C
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N
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C
eZ80
Product
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Figure 35. Typical ZDI Debug Setup
ZDI allows reading and writing of most internal registers without disturbing the state of
the machine. Reads and Writes to memory may occur as fast as the ZDI can download and
PS013012-1004
PRELIMINARY
ZiLOG Debug Interface