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STR720 Datenblatt(PDF) 385 Page - STMicroelectronics |
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STR720 Datenblatt(HTML) 385 Page - STMicroelectronics |
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385 / 401 page ![]() STR720 - ELECTRICAL CHARACTERISTICS 385/401 28.8 AC and DC characteristics The parameters listed in the following tables represent the electrical characteristics of STR720 general purpose I/O pins and external memory interfaces (EMI and SDRAM). On Table 99 the static characteristics are reported. 1. VDD(all) = 1.80 V ± 10%, VDD3(all) = 3.30 V ± 10%, TA = -40 / +85 °C unless otherwise specified. In the following table the dynamic characteristics of general purpose I/O pins and external memory interfaces (EMI and SDRAM are reported). For a description of external memory Table 99. DC Electrical Characteristics Symbol Parameter Test Conditions(1) Value Unit Min. Typ Max VIH Input high level TTL P2(15,14,12:0), P3(12:0), P4(4:0), P6(31:0), P7(45,44,15:0), JTDI, JTCK, JTMS 2.0 - - V Input high level TTL Schmitt Trigger (P2.13) 2.0 - - V VIL Input low level TTL P2(15,14,12:0), P3(12:0), P4(4:0), P6(31:0), P7(45,44,15:0), JTDI, JTCK, JTMS -- 0.8 V Input low level TTL Schmitt Trigger(P2.13) -- 0.8 V VHYS Input hysteresis TTL Schmitt trigger (P2.13) 0.4 - - V VOH Output High Level Standard P2(15:0), P3(12:0), P4(3:0) Push Pull, IOH = 2 mA VDD3 - 0.8 - - V Output High Level: P4(4),P7(43:0), JTDO, JTCK Push Pull, IOH = 4 mA VDD3 - 0.8 - - V Output High Level: P6(59:47,45:0) Push Pull, IOH = 8 mA VDD3 - 0.8 - - V VOL Output Low Level Standard P2(15:0), P3(12:0), P4(3:0) Push Pull, IOL= 2 mA - - 0.4 V Output Low Level: P4(4),P7(43:0), JTDO, JTCK Push Pull, IOL= 4 mA - - 0.4 V Output Low Level: P6(59:47,45:0) Push Pull, IOL= 8 mA - - 0.4 V RWPU Weak pull-up resistor P2(15:0) -15- k Ω RWPD Weak pull-down resistor P3(12:0), P4(3:0) -15- k Ω ILEAK Input leakage current - - 1 µA |
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