Time And Calendar Register Values; Register Descriptions - Texas Instruments OMAP5910 Technical Reference Manual

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Real-Time Clock

Table 7–123. Time and Calendar Register Values

7.13.2 Register Access

All the time and calendar information is available in dedicated registers, which

are called time and calendar registers. Time and calendar register values are

written in binary coded decimal (BCD) code (see Table 7–123).

There are three types of registers:

Time and calendar registers/alarm

Compensation

These three types have their own access constraints.

Access Period Violation

Disable all incoming interrupts during the register read processs

to prevent process interruption and possible violation of the

authorized 15-µs access period.

Leap year: year divisible by 4

Common year: other year

01 to 31 for months 1, 3, 5, 7, 8, 10, 12

01 to 30 for months 4, 6, 9 ,11

01 to 29 for month 2 (leap year)

01 to 28 for month 2 (common year)

00 to 23 in 24-hour mode

01 to 12 in AM/PM mode