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UPD78044F Datasheet(PDF) 44 Page - NEC |
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UPD78044F Datasheet(HTML) 44 Page - NEC |
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44 / 472 page  44 Chapter 2 Pin Function (µPD780828A Subseries) User’s Manual U16504EE1V1UD00 2.3.21 VDD0, VDD1 VDD0 is the positive power supply pin for ports. VDD1 is the positive power supply pin for blocks other than ports. 2.3.22 VSS0, VSS1 VSS0 is the ground pin for ports. VSS1 is the ground pin for blocks other than ports. 2.3.23 VPP (µPD78F0828A only) High-voltage apply pin for FLASH programming mode setting. Connect this pin directly to VSS in normal operating mode. 2.3.24 IC (Mask ROM version only) The IC (Internally Connected) pin is provided to set the test mode to check the µPD78F0828A at delivery. Connect it directly to the VSS with the shortest possible wire in the normal operating mode. When a voltage difference is produced between the IC pin and VSS pin because the wiring between those two pins is too long or an external noise is input to the IC pin, the user’s program may not run nor- mally. Figure 2-1: Connection of IC Pins Caution: Connect IC pins to VSS pins directly. VIC As short as possible ss |
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