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DS80C320-QNL Datasheet(PDF) 3 Page - Maxim Integrated Products |
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DS80C320-QNL Datasheet(HTML) 3 Page - Maxim Integrated Products |
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3 / 40 page  DS80C320/DS80C323 High-Speed/Low-Power Microcontrollers 3 of 40 Figure 1. Block Diagram PIN DESCRIPTION PIN DIP PLCC TQFP NAME FUNCTION 40 44 38 VCC +5V (+3V for DS80C323) 20 22, 23 16, 17 GND Digital Circuit Ground 9 10 4 RST Reset Input. The RST input pin contains a Schmitt voltage input to recognize external active-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 power-up, as the device provides this function internally. 18 20 14 XTAL2 19 21 15 XTAL1 Crystal Oscillator Pins. XTAL1 and XTAL2 provide support for parallel-resonant, AT-cut crystals. XTAL1 acts also as an input in the event that an external clock source is used in place of a crystal. XTAL2 serves as the output of the crystal amplifier. 29 32 26 PSEN Program Store-Enable Output, Active Low. This signal is commonly connected to external ROM memory as a chip enable. PSEN provides an active-low pulse width of 2.25 XTAL1 cycles with a period of four XTAL1 cycles. PSEN is driven high when data memory (RAM) is being accessed through the bus and during a reset condition. DS80C320/ DS80C323 |
Similar Part No. - DS80C320-QNL |
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Similar Description - DS80C320-QNL |
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