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UPD7566AG Datasheet(PDF) 8 Page - NEC |
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UPD7566AG Datasheet(HTML) 8 Page - NEC |
8 / 58 page µPD7566A, 7566A(A) 8 1.4 NOTES ON USING THE P00/INT0, AND RESET PINS In addition to the functions described in 1.1, 1.2, and 1.3, an exclusive function for setting the test mode, in which the internal functions of the µPD7566A are tested, is provided to the P00/INT0 and RESET pins. If a voltage less than VSS is applied to either of these pins, the µPD7566A is put into test mode. Therefore, even when the µPD7566A is in normal operation, if noise less than the VSS is input into any of these pins, the µPD7566A will enter the test mode, and this will cause problems for normal operation. As an example, if the wiring to the P00/INT0 pin or the RESET pin is long, stray noise may be picked up and the above mentioned problem may occur. Therefore, all wiring to these pins must be made short enough to not pick up stray noise. If noise cannot be avoided, suppress the noise using a capacitor or diode as shown in the figure below. • Connect a diode having a low VF across • Connect a capacitor across P00/INT0 and RESET, P00/INT0 and RESET, and VSS. and VSS. VDD P00/INT0, RESET VDD VSS Low VF diode VDD P00/INT0, RESET VDD VSS |
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Similar Description - UPD7566AG |
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