eZ80L92 MCU
Product Specification
160
Zilog Debug Interface
The Zilog Debug Interface (ZDI) provides a built-in debugging interface to the eZ80 CPU.
ZDI provides basic in-circuit emulation features including:
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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 through a two-wire inter-
face that is connected to the ZPAKII emulator. Figure 35 illustrates a typical setup using a
target board, ZPAKII, and the host PC running ZDSII. For more information on ZPAKII
and ZDSII, refer to www.zilog.com.
Target Board
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ZiLOG
Developer
Studio
ZPAK
Emulator
eZ80
Product
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
upload data, with a maximum frequency of one-half the ZLP12840 system clock fre-
PS013015-0316
Zilog Debug Interface
ZILOG [ ZILOG, INC. ]
