Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual de usuario descargar pdf (Pagina 65)

MAXQ Family User’s Guide:

MAXQ2010 Supplement

14-3

Figure 14-2. RTC Prescaler and Trim

Figure 14-3. RTC Trim Adjustment (TSGN = 1)

Figure 14-4. RTC Trim Adjustment (TSGN = 0)

PRESCALER

TRIM

ADJUSTMENT

LOGIC

4096Hz

TSGN

TRIM[3:0]

256Hz

10-SECOND CLOCK

1s - 73.2µs 1s - 73.2µs

1 2 3

ADJUSTMENT MADE HERE

(TSGN = 1)

10 11 12

1s - 73.2µs

SECONDS

TIME (t)

1Hz

OUTPUT

1s + 732µs

AVERAGE = [(1 - 73.2µs) x 9 + (1 + 732µs)]/10 = 1s

1s + 73.2µs 1s + 73.2µs

1Hz

OUTPUT

1 2 3 10 11 12

1s - 732µs 1s + 73.2µs

AVERAGE = [(1s + 73.2µs) x 9 + (1 - 732µs)]/10 = 1s

ADJUSTMENT MADE HERE

(TSGN = 0)

SECONDSTIME (t)

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 146 147

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Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual de usuario Pagina 65