ADUC812BS Analog Devices Inc, ADUC812BS Datasheet - Page 45

• Manufacturer Part Number: ADUC812BS
• Description: IC ADC 12BIT MULTICH MCU 52-MQFP
• Manufacturer: Analog Devices Inc
• Series: MicroConverter® ADuC8xxr

Specifications of ADUC812BS

• Rohs Status: RoHS non-compliant
• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: PSM, Temp Sensor, WDT
• Number Of I /o: 34
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 640 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-MQFP, 52-PQFP

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 hardwired 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 k resistor, as shown in Figure 46. The emulator will then
connect to the 2-pin header also shown in Figure 46. To be com-
patible 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 determining 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
hardware and software development tools.
Hardware:
Code Development:
Code Functionality:
In-Circuit Code Download: Serial Downloader
In-Circuit Debugger:
Miscellaneous Other:
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 in the following sections.
REV. E
ADuC812 Evaluation Board, Plug-In
Power Supply and Serial Port Cable
8051 Assembler
Windows Based Simulator
Serial Port Debugger
CD-ROM Documentation and
Two Additional Prototype Devices
®
compatible)
–45–
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. Application Note uC004 detailing this
serial download protocol is available at 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
breakpoint 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.
Figure 47. Components of the QuickStart Development
System
Figure 48. Typical Debug Session
ADuC812