Inc. Computer Hardware User Manual

REV. B
ADuC812
–45–
Note that the serial port debugger is fully contained on the
ADuC812 device, (unlike “ROM monitor” type debuggers) and
therefore no external memory is needed to enable in-system
debug sessions.
Single-Pin Emulation Mode
Also built into the ADuC812 is a dedicated controller for
single-pin in-circuit emulation (ICE) using standard production
ADuC812 devices. In this mode, emulation access is gained by
connection to a single pin, the EA pin. Normally, this pin is hard-
wired either high or low to select execution from internal or
external program memory space, as described earlier. To enable
single-pin emulation mode, however, users will need to pull the
EA pin high through a 1 kΩ resistor as shown in Figure 46. The
emulator will then connect to the 2-pin header also shown in
Figure 46. To be compatible with the standard connector that
comes with the single-pin emulator available from Accutron Limited
(www.accutron.com), use a 2-pin 0.1-inch pitch “Friction Lock”
header from Molex (www.molex.com) such as their part number
22-27-2021. Be sure to observe the polarity of this header. As
represented in Figure 46, when the Friction Lock tab is at the
right, the ground pin should be the lower of the two pins (when
viewed from the top).
Enhanced-Hooks Emulation Mode
ADuC812 also supports enhanced-hooks emulation mode. An
enhanced-hooks-based emulator is available from Metalink
Corporation (www.metaice.com). No special hardware support
for these emulators needs to be designed onto the board since
these are “pod-style” emulators where users must replace the
chip on their board with a header device that the emulator pod
plugs into. The only hardware concern is then one of determin-
ing if adequate space is available for the emulator pod to fit into
the system enclosure.
Typical System Configuration
A typical ADuC812 configuration is shown in Figure 46. It sum-
marizes some of the hardware considerations discussed in the
previous paragraphs.
QUICKSTART DEVELOPMENT SYSTEM
The QuickStart Development System is a full featured, low cost
development tool suite supporting the ADuC812. The system
consists of the following PC-based (Windows-compatible) hard-
ware and software development tools.
Hardware: ADuC812 Evaluation Board, Plug-In
Power Supply and Serial Port Cable
Code Development: 8051 Assembler
Code Functionality: Windows Based Simulator
In-Circuit Code Download: Serial Downloader
In-Circuit Debugger: Serial Port Debugger
Miscellaneous Other: CD-ROM Documentation and
Two Additional Prototype Devices
Figure 47 shows the typical components of a QuickStart
Development System. A brief description of some of the software
tools components in the QuickStart Development System is
given below.
Figure 47. Components of the QuickStart Development
System
Figure 48. Typical Debug Session
Download—In-Circuit Serial Downloader
The Serial Downloader is a Windows application that allows the
user to serially download an assembled program (Intel Hex format
file) to the on-chip program FLASH memory via the serial
COM1 port on a standard PC. An Application Note (uC004)
detailing this serial download protocol is available from
www.analog.com/microconverter.
DeBug—In-Circuit Debugger
The Debugger is a Windows application that allows the user to
debug code execution on silicon using the MicroConverter UART
serial port. The debugger provides access to all on-chip periph-
erals during a typical debug session as well as single-step and
break-point code execution control.
ADSIM—Windows Simulator
The Simulator is a Windows application that fully simulates all
the MicroConverter functionality including ADC and DAC
peripherals. The simulator provides an easy-to-use, intuitive, inter-
face to the MicroConverter functionality and integrates many
standard debug features; including multiple breakpoints, single
stepping; and code execution trace capability. This tool can be
used both as a tutorial guide to the part as well as an efficient way
to prove code functionality before moving to a hardware platform.
The QuickStart development tool-suite software is freely
available at the Analog Devices MicroConverter Website
www.analog.com/microconverter.