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HD64F36022 Datasheet(PDF) 307 Page - Renesas Technology Corp |
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HD64F36022 Datasheet(HTML) 307 Page - Renesas Technology Corp |
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307 / 384 page  Section 18 Electrical Characteristics Rev. 4.00 Sep. 23, 2005 Page 281 of 354 REJ09B0025-0400 18.3.7 Power-On Reset Circuit Characteristics (Optional) Table 18.16 Power-On Reset Circuit Characteristics V SS = 0.0 V, Ta = –20 to +75°C, unless otherwise indicated. Values Item Symbol Test Condition Min Typ Max Unit Pull-up resistance of RES pin R RES 100 150 — k Ω Power-on reset start voltage* V por — — 100 mV Note: * The power-supply voltage (Vcc) must fall below Vpor = 100 mV and then rise after charge of the RES pin is removed completely. In order to remove charge of the RES pin, it is recommended that the diode be placed in the Vcc side. If the power-supply voltage (Vcc) rises from the point over 100 mV, a power-on reset may not occur. 18.4 Operation Timing tOSC VIH VIL tCPH tCPL tCPr OSC1 tCPf Figure 18.1 System Clock Input Timing |
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