Datasheet

PCA8565 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4 — 5 December 2014 47 of 48
NXP Semiconductors
PCA8565
Real time clock/calendar
28. Figures
Fig 1. Block diagram of PCA8565 . . . . . . . . . . . . . . . . . .3
Fig 2. Pin configuration of PCA8565TS (TSSOP8) . . . . .4
Fig 3. POR override sequence . . . . . . . . . . . . . . . . . . . .9
Fig 4. Voltage-low detection. . . . . . . . . . . . . . . . . . . . . .10
Fig 5. Data flow for the time function . . . . . . . . . . . . . . .12
Fig 6. Access time for read/write operations . . . . . . . . .13
Fig 7. Alarm function block diagram. . . . . . . . . . . . . . . .14
Fig 8. AF timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Fig 9. Interrupt scheme . . . . . . . . . . . . . . . . . . . . . . . . .18
Fig 10. STOP bit functional diagram . . . . . . . . . . . . . . . .20
Fig 11. STOP bit release timing. . . . . . . . . . . . . . . . . . . .20
Fig 12. Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Fig 13. Definition of START and STOP conditions. . . . . .22
Fig 14. System configuration . . . . . . . . . . . . . . . . . . . . . .23
Fig 15. Acknowledgement on the I
2
C-bus . . . . . . . . . . . .23
Fig 16. Slave address . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Fig 17. Master transmits to slave receiver (write mode) .24
Fig 18. Master reads after setting word address (write
word address; read data). . . . . . . . . . . . . . . . . . .25
Fig 19. Master reads slave immediately after first byte
(read mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Fig 20. Interface watchdog timer . . . . . . . . . . . . . . . . . . .26
Fig 21. Device diode protection diagram of PCA8565. . .27
Fig 22. I
DD
as a function of V
DD
. . . . . . . . . . . . . . . . . . . .30
Fig 23. I
DD
as a function of V
DD
. . . . . . . . . . . . . . . . . . . .30
Fig 24. I
DD
as a function of temperature . . . . . . . . . . . . .31
Fig 25. Frequency deviation as a function of V
DD
. . . . . .31
Fig 26. I
2
C-bus timing waveforms . . . . . . . . . . . . . . . . . .33
Fig 27. Application diagram of PCA8565. . . . . . . . . . . . .33
Fig 28. Package outline SOT505-1 (TSSOP8) of
PCA8565TS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Fig 29. Temperature profiles for large and small
components . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39