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ST7285C Datenblatt(PDF) 89 Page - STMicroelectronics |
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ST7285C Datenblatt(HTML) 89 Page - STMicroelectronics |
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89 / 117 page ![]() 89/117 ST7285C 6.4 AC ELECTRICAL CHARACTERISTICS (TA = -40 to +85 °C unless otherwise specified) 6.5 CONTROL TIMING (Operating conditions T A = -40 to +85°C unless otherwise specified) Note: 1. The minimum period t ILIL should not be less than the number of cycle times it takes to execute the interrupt service routine plus 21 cycles. Symbol Parameter Condition s Value Unit Min Typ. Max VDD Operating Supply Voltage 4.332 MHz Internal 4.5 5.5 V I DD Supply Current RUN Mode f EXT = 8.664MHz VDD = 5.0V, fINT = 4.332MHz WAIT Mode f EXT = 8.664MHz VDD = 5.5V, fINT = 4.332MHz HALT Mode, V DD = 5.0V 3 200 20 5 320 mA mA µA VRM Data Retention Mode HALT Mode 2 V Symbol Parameter Conditi ons Value Unit Min Typ. Max f OSC Frequency of Operation V DD = 4.5V f external f internal 8.664 4.332 MHz t ILCH Halt Mode Recovery Startup Time Crystal Resonator 20 ms tRL External RESET Input pulse Width 1.5 tCYC t PORL Power Reset Duration 4096 t CYC TDOGL Watchdog RESET Output Pulse Width 200 ns t DOG Watchdog Time-out 12,288 786,432 t CYC tILIL Interrupt Pulse Period (1) tCYC tOXOV Crystal Oscillator Start-up Time 50 ms t DDR Power up rise time V DD min 100 ms |
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