DS87C530/DS83C530 EPROM/ROM Microcontrollers with
Figure 1. Block Diagram
DS87C530/
DS83C530
PIN DESCRIPTION
| PIN | NAME | FUNCTION | |
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PLCC |
| TQFP | ||
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52 |
| 45 | VCC | +5V Processor Power Supply |
1, 25 |
| 18, 46 | GND | Processor Digital Circuit Ground |
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29 |
| 22 | VCC2 | +5V RTC Supply. VCC2 is isolated from VCC to isolate the RTC from digital noise. |
26 |
| 19 | GND2 | RTC Circuit Ground |
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| Reset Input. This pin contains a Schmitt voltage input to recognize external active |
12 |
| 5 | RST | high reset inputs. The pin also employs an internal pulldown resistor to allow for a |
| combination of wired OR external reset sources. An RC is not required for | |||
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| as the device provides this function internally. |
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23 |
| 16 | XTAL2 | Crystal Oscillator Pins. XTAL1 and XTAL2 provide support for |
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24 |
| 17 | XTAL1 | place of a crystal. XTAL2 is the output of the crystal amplifier. |
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