DSP56857 datasheet(396/662 Pages) FREESCALE

396 / 662 page

5685X Digital Signal Controller User Manual, Rev. 4

14-10

Freescale Semiconductor

14.6.2.7 Time-of-Day Minutes Alarm Enable (TODMA)—Bit 5

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0 = Alarm interrupt ignores minutes counter

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1 = Alarm interrupt requires match of minutes alarm register to minutes counter

14.6.2.8 Time-of-Day Seconds Alarm Enable (TODSA)—Bit 4

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0 = Alarm interrupt ignores seconds counter

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1 = Alarm interrupt requires match of seconds alarm register to seconds counter

14.6.2.9 Time-of-Day Seconds Interrupt Enable (TODSEN)—Bit 3

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0 = Disables TOD seconds interrupt

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1 = Enables TOD seconds interrupt

14.6.2.10 Time-of-Day Alarm Interrupt Enable (TODAEN)—Bit 2

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0 = Disables TOD alarm interrupt

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1 = Enables TOD alarm interrupt

14.6.2.11 Time-of-Day Lock (TOD_LOCK)—Bit 1

When set, this bit prevents the time registers from automatically updating to the current value of

the time counters while the TOD module is enabled. It is used to avoid register updates while in

the process of reading out the four time registers. It should be set only when in process of reading

the current time while the TOD module is enabled.

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0 = TOD registers not locked

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1 = TOD registers locked

14.6.2.12 Time-of-Day Enable (TODEN)—Bit 0

Writing zero to TODEN disables the time-of-day counting; the time registers will contain the

final value of the time counters and the registers become writable. When this field is written with

1, the seconds, minutes, hours, and days counters are loaded from the corresponding register and

proceed to count in a normal time-of-day basis with seconds overflow incrementing minutes,

minutes overflow incrementing hours, and so on through days overflow wrapping back to zero.

While time-of-day counting is enabled, the seconds, minutes, hours, and day registers update

with a two IPBus clock delay to the value of the corresponding counter, so reading the registers

returns the current time-of-day. In this mode, writing seconds register, minutes register, hour

DSP56857 Datasheet(PDF) 396 Page - Freescale Semiconductor, Inc