Rainbow-electronics DS1687 Manual do Utilizador Página 38
- Página / 38
- Índice
- MARCADORES
- DS1685/DS1687 1
- 3V/5V Real-Time Clock 1
- ORDERING INFORMATION 2
- TYPICAL OPERATING CIRCUIT 3
- DESCRIPTION 3
- OPERATION 3
- SIGNAL DESCRIPTIONS 4
- DS1685 ONLY 5
- Figure 1. BLOCK DIAGRAM 7
- OSCILLATOR STARTUP TIME 8
- CLOCK ACCURACY 8
- RTC ADDRESS MAP 9
- 10 of 38 10
- 11 of 38 11
- CONTROL REGISTERS 12
- REGISTER A 12
- REGISTER B 13
- REGISTER C 14
- REGISTER D 14
- NV RAM—RTC 15
- INTERRUPT CONTROL 15
- SQUARE-WAVE OUTPUT SELECTION 16
- Oscillator Control Bits 16
- PERIODIC INTERRUPT SELECTION 16
- FREQUENCY 17
- UPDATE CYCLE 18
- EXTENDED FUNCTIONS 19
- SILICON SERIAL NUMBER 19
- CENTURY COUNTER 19
- AUXILIARY BATTERY 20
- WAKE-UP/KICKSTART 20
- RAM CLEAR 21
- 128 x 8 EXTENDED RAM 22
- 23 of 38 23
- EXTENDED CONTROL REGISTERS 24
- EXTENDED CONTROL REGISTER 4A 24
- EXTENDED CONTROL REGISTER 4B 25
- ABSOLUTE MAXIMUM RATINGS* 27
- DC ELECTRICAL CHARACTERISTICS 28
- RTC AC TIMING CHARACTERISTICS 30
- AC TEST CONDITIONS 30
- REGISTERS 32
- POWER-UP/DOWN TIMING, 5V (T 33
- POWER-UP/DOWN TIMING, 3V (T 33
- CAPACITANCE (T 33
- WAKE-UP/KICKSTART TIMING (T 33
- POWER-UP CONDITION, 3V 34
- POWER-DOWN CONDITION, 3V 34
- POWER-UP CONDITION, 5V 35
- POWER-DOWN CONDITION, 5V 35
- WAKE-UP/KICKSTART TIMING 36
- 37 of 38 37
- 38 of 38 38
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