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UPD75116A Datasheet(PDF) 10 Page - NEC |
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UPD75116A Datasheet(HTML) 10 Page - NEC |
10 / 56 page 10 µPD75112(A), 75116(A) 3.5 Caution Relating to Use of P00/INT4 Pin and RESET Pin In addition to the functions described in sections 3.1 and 3.2, the P00/INT4 pin and the RESET pin have the function to set the IC test mode for testing the µPD75116(A) internal operations. When a voltage larger than VDD is applied to one of these two pins, the test mode is set. Thus, if noise exceeding VDD is applied even during normal opera- tions, the test mode is set and normal operations may be discontinued. For example, if a cable from the P00/INT4 or RESET pin is too long, inter-wiring noise may be applied to the pin, the pin voltage may become larger than VDD, causing malfunctioning. Thus, carry out wiring to minimize inter-wiring noise. If the noise cannot be suppressed completely, carry out the following countermeasure against noise using an externally mounted component. o Connect a diode with low VF (max 0.3 V)between VDDs Diode with low VF o Connect acapacitor between VDDs 3.4 Recommended Connection of Unused Pins Pin PTH00 to PTH03 TI0 TI1 P00 P01 to P03 P10 to P13 P20 to P23 P30 to P33 P40 to P43 P50 to P53 P60 to P63 P70 to P73 P80 to P83 P90 to P93 P120 to P123 P130 to P133 P140 to P143 RESET NC *1: Only when a power-on reset generator is built in by mask option, connect t VDD. 2: When the PWB is shared with the µPD75P116, connect the NC pin to VDD directly. Recommended Connecting Method Connect to VSS or VDD Connect to VSS Connect to VSS or VDD Connect to VSS Input state : Connect to VSS or VDD Output state : Leave open Connect to VDD*1 Leave open or connect to VDD*2 VDD VDD P00/INT4, RESET VDD VDD P00/INT4, RESET |
Similar Part No. - UPD75116A |
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Similar Description - UPD75116A |
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