Rainbow-electronics DS1554 Manual de usuario Pagina 15
- Pagina / 20
- Tabla de contenidos
- MARCADORES
- 256K NV Y2KC Timekeeping RAM 1
- ORDERING INFORMATION 2
- PIN DESCRIPTION 2
- - Battery Connection 2
- DESCRIPTION 2
- PACKAGES 3
- DS1554 BLOCK DIAGRAM Figure 1 3
- DATA READ MODE 4
- DATA WRITE MODE 4
- DATA RETENTION MODE 4
- BATTERY LONGEVITY 5
- INTERNAL BATTERY MONITOR 5
- POWER-ON RESET 5
- CLOCK OPERATIONS 5
- DS1554 REGISTER MAP Table 2 6
- CLOCK OSCILLATOR CONTROL 6
- READING THE CLOCK 6
- SETTING THE CLOCK 7
- CLOCK ACCURACY (DIP MODULE) 7
- FREQUENCY TEST MODE 7
- USING THE CLOCK ALARM 7
- ALARM MASK BITS Table 3 8
- USING THE WATCHDOG TIMER 9
- POWER-ON DEFAULT STATES 9
- 10 of 20 10
- IRQ /FT and RST 10
- DC ELECTRICAL CHARACTERISTICS 11
- (Over the Operating Range; V 11
- =3.3V ±10%) 11
- 13 of 20 13
- POWER-UP/DOWN CHARACTERISTICS 14
- =5.0V ±10%) 14
- 15 of 20 15
- CE or WE at V 15
- RST High 15
- IRQ /FT, RST 15
- AC TEST CONDITIONS 16
- DS1554 32-PIN PACKAGE 17
- 18 of 20 18
- 19 of 20 19
- 20 of 20 20
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