DS89C450-K00 Datasheet, PDF (5/12 Pages) Maxim Integrated Products – DS89C450 Evaluation Kit

DS89C450-K00, DS89C450 Evaluation Kit
DIP switches SW4.3 and SW4.4 are used as configuration inputs by the CPLD program. Normally, these switches
should be OFF for proper operation. Turning DIP switch SW4.3 ON causes the high address lines A16 and A17 to
be set to the values at port pins P1.0 and P1.1. This can be used for address banking, but is not required for
normal operation. Turning DIP switch SW4.4 on puts the CPLD into a test mode; press SW3 to toggle the LEDs.
Pushbuttons
Reset and interrupt pushbuttons are provided. The reset button resets the DS89C450, while the interrupt button
can be configured to pull down either the INT0 (by setting SW1.4 ON) or T0 (by setting SW1.5 ON) inputs to the
microcontroller when pressed.
Header Pins and Prototyping Area
Header J4 provides access to all pins of the DS89C450, including power and ground. This header is adjacent to a
0.100” spaced grid prototyping area for circuit development.
GETTING STARTED
Before using the DS89C450 Evaluation Kit, the Microcontroller Tool Kit (MTK) application should be installed. MTK
is included on the CD and is available at www.maxim-ic.com/products/microcontrollers/software/index.cfm.
1) Connect the DC 6V–9V, center post positive power supply to the power plug J1.
2) Connect a DB9 straight-through serial cable between the PC COM1 port and connector J2.
3) Set DIP switches SW1.1, SW1.2, SW1.3, SW4.1, and SW4.2 ON. All other DIP switches should be OFF.
4) Turn power ON. All the LEDs should light except for the second from the right.
5) Open MTK. In the initial dialog box, select the type of processor you are using (DS89C430, DS89C440, or
DS89C450).
6) Select Options -> Configure Serial Port from the menu. Enter COM1 and 14400 baud.
7) Select Target -> Open COM1 at 14400 baud.
8) Select Target -> Connect to Loader.
9) A loader banner should appear, as shown in Figure 3.
Refer to the user’s guide for more details on the bootloader commands for the DS89C450. To load an application
into the DS89C450 flash memory, first enter “K” at the bootloader prompt to erase the flash, then select File ->
Load Flash and open the .hex file you wish to load. The Help menu in MTK provides additional information.
The bootloader also allows you to write to Port 1 directly by entering “W P1 xx,” where xx is a hex byte value. If you
enter a value such as “W P1 55” or “W P1 AA,” the LED display will change to reflect the new outputs at Port 1.
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