Analog Devices ADSP-SC58 Series Hardware Reference Manual page 1129

RTC Clock Register
The register is used to read or write the current time. It has no reset and an undefined value when the
RTC_CLK
RTC VDD is first powered up. Writing invalid time values is forbidden (for example, an hour value more than 23
and a minute value more than 59). The
when the core starts up, the values read from
programs must wait for the second event and then read this register.
HOUR[3:0] (R/W)
Hour Count
MIN (R/W)
Minute Count
Figure 22-4: RTC_CLK Register Diagram
Table 22-8: RTC_CLK Register Fields
Bit No.
(Access)
31:17 DAY
(R/W)
16:12 HOUR
(R/W)
11:6 MIN
(R/W)
5:0 SEC
(R/W)
ADSP-SC58x/ADSP-2158x SHARC+ Processor Hardware Reference
RTC_CLK
RTC_CLK
15 14 13 12
0 0 0 0
31 30 29 28
0 0 0 0
DAY (R/W)
Day Count
Bit Name
Day Count.
The RTC_CLK.DAY bit provides the day count from 0 to 32767.
Hour Count.
The RTC_CLK.HOUR bit provides the hour count from 0 to 23.
Minute Count.
The RTC_CLK.MIN bit provides the minute count from 0 to 59.
Second Count.
The RTC_CLK.SEC bit provides the second count from 0 to 59.
register is updated every second. If the RTC is already running
are zero until the first second event comes. In this case,
11 10 9 8 7 6 5 4
0 0 0 0 0 0 0 0
27 26 25 24 23 22 21 20
0 0 0 0 0 0 0 0
Description/Enumeration
ADSP-SC58x RTC Register Descriptions
3 2 1 0
0 0 0 0
SEC (R/W)
Second Count
19 18 17 16
0 0 0 0
HOUR[4] (R/W)
Hour Count
22–13