RTC_B Registers
702
SLAU367P – October 2012 – Revised April 2020
Copyright © 2012–2020, Texas Instruments Incorporated
Real-Time Clock B (RTC_B)
28.3.3 RTCCTL2 Register
Real-Time Clock Control 2 Register
Figure 28-4. RTCCTL2 Register
7
6
5
4
3
2
1
0
RTCCALS
Reserved
RTCCALx
rw-(0)
r0
rw-(0)
rw-(0)
rw-(0)
rw-(0)
rw-(0)
rw-(0)
Table 28-4. RTCCTL2 Register Description
Bit
Field
Type
Reset
Description
7
RTCCALS
RW
0h
Real-time clock calibration sign
0b = Frequency adjusted down
1b = Frequency adjusted up
6
Reserved
R
0h
Reserved. Always read as 0.
5-0
RTCCALx
RW
0h
Real-time clock calibration. Each LSB represents approxi4-ppm
(RTCCALS = 1) or a –2-ppm (RTCCALS = 0) adjustment in frequency.
28.3.4 RTCCTL3 Register
Real-Time Clock Control 3 Register
Figure 28-5. RTCCTL3 Register
7
6
5
4
3
2
1
0
Reserved
RTCCALFx
r0
r0
r0
r0
r0
r0
rw-(0)
rw-(0)
Table 28-5. RTCCTL3 Register Description
Bit
Field
Type
Reset
Description
7-2
Reserved
R
0h
Reserved. Always read as 0.
1-0
RTCCALFx
RW
0h
Real-time clock calibration frequency. Selects frequency output to RTCCLK pin
for calibration measurement. The corresponding port must be configured for the
peripheral module function.
00b = No frequency output to RTCCLK pin
01b = 512 Hz
10b = 256 Hz
11b = 1 Hz