RTC_B Registers
710
SLAU367P – October 2012 – Revised April 2020
Copyright © 2012–2020, Texas Instruments Incorporated
Real-Time Clock B (RTC_B)
28.3.20 RTCAHOUR Register – Hexadecimal Format
Real-Time Clock Hours Alarm Register – Hexadecimal Format
Figure 28-21. RTCAHOUR Register
7
6
5
4
3
2
1
0
AE
0
0
Hours
rw
r-0
r-0
rw
rw
rw
rw
rw
Table 28-21. RTCAHOUR Register Description
Bit
Field
Type
Reset
Description
7
AE
RW
undefined
Alarm enable
0b = This alarm register is disabled
1b = This alarm register is enabled
6-5
0
R
0h
Always reads as 0.
4-0
Hours
RW
undefined
Hours. Valid values are 0 to 23.
28.3.21 RTCAHOUR Register – BCD Format
Real-Time Clock Hours Alarm Register – BCD Format
Figure 28-22. RTCAHOUR Register
7
6
5
4
3
2
1
0
AE
0
Hours – high digit
Hours – low digit
rw
r-0
rw
rw
rw
rw
rw
rw
Table 28-22. RTCAHOUR Register Description
Bit
Field
Type
Reset
Description
7
AE
RW
undefined
Alarm enable
0b = This alarm register is disabled
1b = This alarm register is enabled
6
0
R
0h
Always reads as 0.
5-4
Hours – high digit
RW
undefined
Hours – high digit. Valid values are 0 to 2.
3-0
Hours – low digit
RW
undefined
Hours – low digit. Valid values are 0 to 9.