Smith Machine Works, Inc.
Version 1.0 – gdy, July
26, 2011
M68HC908QT MINI Rapid Development
PCB
FEATURES -
·
An improved MON08 interface based on Figure 9-3
of the Motorola “Data Sheet” (MC68HC908QY4/D, Rev 0).
Connects to a host PC with a
simple, serial cable; No expensive interface boards are required.
·
Fully
Functional and Improved DTR POR Control Interface. Jumper
selectable external oscillator and Vtst supply
available to allow entry into Vtst Monitor Mode as
well as Forced Monitor modes. Circuit
improvements resolve issues with Vtst rise-time and
fully remove Vtst from the target MCU during the POR
cycle. The external oscillator may be
disabled for testing with the internal oscillator only. A MANUAL POR mode
is also available for debuggers/programmers that do not support DTR driven POR.
·
Supports both
QT and QY MCUs. The NITRON MINI Rapid Development PCB is designed primarily for the Nitron QT (8-Pin) family of devices (The NITRON EXPRESS
Rapid Development PCB is recommended for those who expect to be developing with
the QY device family), hoiwever
the NITRON MINI can be adapted to accept the QY family devices by the
installation of a 16-Pin Wire-Wrap socket in the prototype area and the
installation of eight Wire-Wrap jumpers. Details are available from the
factory.
·
A serious
prototyping area. One column of 3-hole pads with heavy duty
ground and power buses accepts all popular width Wire-Wrap Dip sockets from
0.3” to 0.7” wide. The column has 70, 3-hole pads, enough for four 16-Pin
sockets with 0.1” spacing between each socket. Wide, 0.6” Dip sockets
(such as needed by 32 Pin memory chips) can be intermixed with standard 0.3”
Dip sockets. The power and ground
busses are heavily bypassed with both bulk and high frequency capacitors.
·
STATUS LEDs. Dedicated status LEDs
monitor board power and status of the DTR controlled POR circuit. Two additional LEDs
are available to indicate user program status.
·
TEST
POINTS. All target MCU pins are connected to convenient Wire
Wrap test points ready to attach to prototype area circuits or for the easy
attachment of scope probes or clip leads. Three dedicated ground test points
are conveniently located for the attachment of scope ground clips or
multi-meter common leads.
·
External
interface connectors. Mounting pads are provided to accept two, ten pin
flat ribbon cable connectors to interface the prototype PCB to external
circuits.
·
SIZE – The overall board size is 4.3” by 4.0”.
SOFTWARE COMPATIBILITY –
The NITRON MINI Rapid
Prototyping PCB was designed especially for the cost and time conscious
embedded systems designer in mind. It
was designed expressly to be used with the NoICE
Debugger and the IMAGEcraft ICC08 C
and Assembler cross-development platform and IDE. While neither of these products is “Free”,
a “Free” product that consumes substantial resources and requires a
very steep “learning curve” is not “free” either.
For more information
For the NoICE
Debugger, see http://www.noicedebugger.com
For IMAGEcraft C, see http://www.imagecraft.com
PRODUCT STATUS –
The NITRON MINI Rapid Prototyping PCB is currently available in limited quantities.
Its current status is “pre-production/production ramp-up”. I have a small pre-production run of PCBs on hand that will be assembled to order and sold on a first-come, first-served basis.
REGULATORY COMPLIANCE -
This product is intended only
for use in development laboratories. It is not intended for use in
end products subject to inspections or regulatory control in the
PRODUCT PRICING –
Introductry pricing is set at $80.00 each, assembled and tested with documentation.
Final pricing will be established after production quantities are determined.
Initial sales will be in the
Credit card capability is being investigated and may be available in the near future. Until then, payment terms will be check or cash only.
For orders and inquiries,
contact the factory at mailto:bobsmith5@verizon.net
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