Rainbow-electronics DS17487 Manual de usuario Pagina 31
- Pagina / 38
- Tabla de contenidos
- MARCADORES
- DS17485/DS17487 1
- 3V/5V Real-Time Clock 1
- ORDERING INFORMATION 2
- PIN DESCRIPTION 2
- DESCRIPTION 2
- OPERATION 3
- SIGNAL DESCRIPTIONS 3
- Figure 1. BLOCK DIAGRAM 5
- DS17485 ONLY 6
- RTC ADDRESS MAP 7
- 8 of 38 8
- CONTROL REGISTERS 9
- REGISTER A 9
- LSB 9
- REGISTER B 10
- LSB 10
- REGISTER C 11
- REGISTER D 11
- NV RAM–RTC 12
- INTERRUPT CONTROL 12
- SQUARE-WAVE OUTPUT SELECTION 13
- PERIODIC INTERRUPT SELECTION 13
- OSCILLATOR CONTROL BITS 13
- FREQUENCY 14
- UPDATE CYCLE 15
- EXTENDED FUNCTIONS 16
- Silicon Serial Number 16
- Century Counter 16
- RTC Write Counter 16
- Auxiliary Battery 17
- Wake-Up/Kickstart 17
- goes below V 18
- RAM Clear 19
- 4k x 8 Extended RAM 19
- 20 of 38 20
- EXTENDED CONTROL REGISTERS 21
- EXTENDED CONTROL REGISTER 4A 21
- EXTENDED CONTROL REGISTER 4B 22
- 23 of 38 23
- ABSOLUTE MAXIMUM RATINGS* 24
- OPERATING RANGE 24
- CRYSTAL SPECIFICATIONS* 26
- AC TEST CONDITIONS 27
- 30 of 38 30
- CS High to Power-Fail 30
- POWER-UP CONDITION, 3V 31
- POWER-DOWN CONDITION, 3V 31
- POWER-UP CONDITION, 5V 32
- POWER-DOWN CONDITION, 5V 32
- WAKE-UP/KICKSTART TIMING 33
- BURST MODE TIMING WAVEFORM 34
- DS17485 24-PIN DIP 35
- DS17485 24-PIN SO 36
- DS17485 28-PIN TSOP 37
- DS17487 RTC PLUS RAM 38
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