Rainbow-electronics DDS1693 Manual do Utilizador descarregar pdf (Página 8)

DS1689/DS1693

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TIME, CALENDAR AND ALARM DATA MODES Table 1

RANGE

ADDRESS

LOCATION

FUNCTION

DECIMAL

RANGE

BINARY DATA

MODE

BCD DATA

MODE

00H Seconds 0-59 00-3B 00-59

01H Seconds Alarm 0-59 00-3B 00-59

02H Minutes 0-59 00-3B 00-59

03H Minutes Alarm 0-59 00-3B 00-59

Hours 12-hr Mode 1-12 01-0C AM, 81-8C PM 01-12 AM, 81-92 PM04H

Hours 24-hr Mode 0-23 00-17 00-23

Hours Alarm 12-hr

Mode

1-12 01-0C AM, 81-8C PM 01-12 AM, 81-92 PM05H

Hours Alarm 24-hr

Mode

0-23 00-17 00-23

06H Day of Week

Sunday=1

1-7 01-07 01-07

07H Date of Month 1-31 01-1F 01-31

08H Month 1-12 01-0C 01-12

09H Year 0-99 00-63 00-99

BANK1, 48H Century 0-99 00-63 00-99

BANK 1, 49H Date Alarm 1-31 01-1F 01-31

CONTROL REGISTERS

The four control registers; A, B, C, and D reside in both bank 0 and bank 1. These registers are accessible

at all times, even during the update cycle.

NONVOLATILE RAM - RTC

The 114 general-purpose nonvolatile RAM bytes are not dedicated to any special function within the

DS1689/DS1693. They can be used by the application program as nonvolatile memory and are fully

available during the update cycle. This memory is directly accessible when bank 0 is selected.

INTERRUPT CONTROL

The DS1689/DS1693 includes six separate, fully automatic sources of interrupt for a processor:

1. Alarm interrupt

2. Periodic interrupt

3. Update-ended interrupt

4. Wake-up interrupt

5. Kickstart interrupt

6. RAM clear interrupt

The conditions, which generate each of these independent interrupt conditions, are described in greater

detail elsewhere in this data sheet. This section describes the overall control of the interrupts.

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