Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual de usuario descargar pdf (Pagina 69)

MAXQ Family User’s Guide:

MAXQ2010 Supplement

14-7

14.4.6 RTC Subsecond Alarm Register (RSSA, M0[1Dh])

Bits 7:0: RTC Subsecond Alarm Register. This register contains the reload value for the subsecond alarm. The ALSF

bit is set when an autoreload occurs.

14.4.7 RTC Time-of-Day Alarm High Register (RASH, M0[1Eh])

Bits 7:0: RTC Time-of-Day Alarm High Register. This register contains the most significant bits for the 24-bit time-of-

day alarm. The time-of-day alarm is formed by the RASH and the RASL registers, and only the lower 20 bits is meaning-

ful for the alarm function. Each time the subsecond counter rolls over (once per second), the RTC compares the lowest

20 bits of the time-of-day alarm setting (RASH[3:0]:RASL[15:0]) with the 20 least significant bits of the seconds counter

(RTSH[3:0]:RTSL[15:0]). The time-of-day alarm is triggered when these two 20-bit values match.

14.4.8 RTC Time-of-Day Alarm Low Register (RASL, M0[1Fh])

Bits 15:0: RTC Time-of-Day Alarm Low Register. This register contains the least significant bits for the 20-bit time-of-

day alarm. The time-of-day alarm is formed by the RASH and the RASL registers and only the lower 20 bits are mean-

ingful for the alarm function. Each time the subsecond counter rolls over (once per second), the RTC compares the

lowest 20 bits of the time-of-day alarm setting (RASH[3:0]:RASL[15:0]) with the 20 least significant bits of the seconds

counter (RTSH[3:0]:RTSL[15:0]). The time-of-day alarm is triggered when these two 20-bit values match.

Note: Write accessible when BUSY = 0 and either ASE = 0 or RTCE = 0.

Bit #

7 6 5 4 3 2 1 0

Name RSSA

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

Bit #

7 6 5 4 3 2 1 0

Name RASH

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw Rw

Bit #

15 14 13 12 11 10 9 8

Name RASL

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

Bit #

7 6 5 4 3 2 1 0

Name RASL

Reset 0 0 0 0 0 0 0 0

Access rw rw rw rw rw rw rw rw

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 146 147

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Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Manual de usuario Pagina 69