8253 is a programmable interval timer / counter. Timer applications in electronic instruments are very wide and important. 8253 has three timer / counters built-in one IC. Each timer can be independently programmed under 5 different modes. They are; interrupt on terminal count (mode 0), programmable one shot (mode 1), rate generator (mode 2), and square wave rate generator (mode 3), software triggered strobe (mode 4), and hardware triggered strobe. To experiment each of the above, we need clock input, gate control, and power supply. This trainer has all the necessary facilities, to experiment. Programs and listings are supplied. Note: This experimental module can be interfaced to Microprocessor trainer MPT-85 at system bus. |
