DSP56857 datasheet(390/662 Pages) FREESCALE

390 / 662 page

Features

5685X Digital Signal Controller User Manual, Rev. 4

14-4

Freescale Semiconductor

14.2 Features

•

Separate counters for seconds, minutes, hours, and days with a 16-bit day capacity

•

Separate read/write registers for seconds, minutes, hours, and days

•

Alarm clock registers for seconds, minutes, hours, and days

•

Alarm interrupt with independent enables for compare of seconds, minutes, hours and

days

•

1Hz interrupt with enable

•

TOD reset only at power-on, unaffected by reset pin, software reset, or COP reset

•

Flexible clock prescaling for use with either external clocking or crystal oscillator

•

Works with crystal frequency of 2 - 4MHz

•

Capability to generate interrupt, pulling the part out of sleep

•

Can be configured to generate an alarm at a designated time

14.3 Block Diagram

Figure 14-1. Time-of-Day Counter Operation Block Diagram

Scaler load

Clock scaler

TOD

Enable

1Hz

Seconds Cntr

Minutes Cntr

Hours Cntr

Days Cntr

Seconds Reg

Minutes Reg

Hours Reg

Days Reg

IPBus

Interface

1-65536Hz input clock (integer Hz)

TODSEC

TODMIN

TODHR

TODDAY

Seconds Alarm

TOD One-Second interrupt

TOD

Alarm

interrupt

TOD Alarm Controls

DSP56857 Datasheet(PDF) 390 Page - Freescale Semiconductor, Inc

DSP56857 Datasheet(HTML) 390 Page - Freescale Semiconductor, Inc

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