Register Map; Register Descriptions; Rtc Counter Register - Rtccnt; Table 41. Rtc Register Map - Holtek HT32F50231 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F50231/HT32F50241

Register Map

The following table shows the RTC registers and reset values. Note all the registers in this unit are
located at the V

Table 41. RTC Register Map

Register
RTCCNT
RTCCMP
RTCCR
RTCSR
RTCIWEN

Register Descriptions

RTC Counter Register – RTCCNT
This register defines a 24-bit up-counter which is incremented by the CK_SECOND clock.
Offset: 0x000
Reset value: 0x0000_0000 (Reset by V
31
Type/Reset
23
Type/Reset RO 0 RO
15
Type/Reset RO 0 RO
7
Type/Reset RO 0 RO
Bits Field
[23:0] RTCCNTV
Rev. 1.00
power domain.
DD15
Offset
0x000 RTC Counter Register
0x004 RTC Compare Register
0x008 RTC Control Register
0x00C RTC Status Register
0x010 RTC Interrupt and Wakeup Enable Register
Power Domain reset only)
DD15
30 29 28
22 21 20
0 RO 0 RO
14 13 12
0 RO 0 RO
6 5
0 RO 0 RO
Descriptions
RTC Counter Value
The current value of the RTC counter is returned when reading the RTCCNT register.
The RTCCNT register is updated during the falling edge of the CK_SECOND. This
register is reset by one of the following conditions:
- Software reset – Set the PWCURST bit in the PWRCR register
- V Power Domain power on reset – POR15
DD15
- Compare match (RTCCNT = RTCCMP) when CMPCLR = 1 (in the RTCCR
register)
- RTCEN bit changed from 0 to 1
376 of 486
Description
27 26
Reserved
19 18
RTCCNTV
0 RO 0 RO
11 10
RTCCNTV
0 RO 0 RO
4 3 2
RTCCNTV
0 RO 0 RO
Reset Value
0x0000_0000
0x0000_0000
0x0000_0F00
0x0000_0000
0x0000_0000
25 24
17 16
0 RO 0 RO 0
9 8
0 RO 0 RO 0
1 0
0 RO 0 RO 0
July 31, 2018