Rainbow-electronics MAX6901 User Manual

General DescriptionThe MAX6901 3-wire serial interface real-time clock in aTDFN package contains a real-time clock/calendar and31 x 8 bits of static R

MAX6901does not happen coincident with a Seconds counterincrement to ensure accurate time data is being read.The clock counters continue to count and

tive alarm function. For example, if the AlarmConfiguration register is set to 0000 0011, ALM OUT isset when both the minutes and seconds indicated in

MAX690132.768kHz Output (32KHZ)32KHZ is a push-pull 32.768kHz output for timing orclocking of external devices. Bit D7 in the ClockSeconds register is

f = nominal crystal frequencyk = parabolic curvature constant (-0.035ppm/°C2±0.005ppm/°C2 for 32.768kHz watch crystals)T0= turnover temperature (+25°C

MAX6901∆ttotal = ∆tdrift+ ∆tinitial∆ttotal = 0.00002+0.000025=0.000045s/sAfter 1 month, that translates to:Total worst-case timekeeping error at the e

VCCdrops to less than 1.6V (typ), the MAX6901 resetsall register contents to the POR defaults (Table 2). RESERVED RegistersAddresses/Commands 90h, 91h

MAX6901There are similar considerations for 32KHZ if it isplaced in its high-impedance state. For lowest time-keeping current, it should not be allowe

MAX69013-Wire Serial RTC in a TDFN______________________________________________________________________________________ 17OSCILLATOR32.768kHzDIVIDER3

MAX69013-Wire Serial RTC in a TDFNMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim produc

MAX69013-Wire Serial RTC in a TDFN2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSStr

MAX69013-Wire Serial RTC in a TDFN_______________________________________________________________________________________ 3Note 1: All parameters are

MAX6901Detailed DescriptionThe MAX6901 is a real-time clock/calendar with a 3-wireserial interface and 31 ✕8 bits of SRAM. It provides sec-onds, minut

Clock Burst ModeAccessing the Clock Burst register specifies burst-mode operation. In this mode, multiple bytes are reador written with a single Addre

MAX6901then read the Seconds register again (final-seconds).Check to see that final-seconds is equal to initial-sec-onds. If not, repeat the write pro

MAX69013-Wire Serial RTC in a TDFN_______________________________________________________________________________________ 7Table 2. Register Address/D

MAX6901onds). Check to see that final-seconds is equal to ini-tial-seconds. If not, repeat the write process.Note: After writing to any time or date r

MAX69013-Wire Serial RTC in a TDFN_______________________________________________________________________________________ 9WRITEADDRESS/COMMANDBYTE (H