Register Map; Table 13. Power Status After System Reset; Table 14. Pwrcu Register Map - Holtek HT32F12345 User Manual

32-Bit Arm ® Cortex ® -M3 MCU
HT32F12345
After a system reset, the PORSTF bit in the RSTCU GRSR register, the PDF and BAKPORF bits
in the BAKSR register should be checked by software to confirm if the device is being resumed
from the Power-Down mode by a backup domain power on reset, an unexpected loss of the 1.5
V power or other reset events (nRST, WDT,...). If the device has entered the Power-Down mode
under the correct firmware procedure, then the PDF bit will be set. The System information could
be saved in the Backup Registers and be retrieved when the 1.5 V power domain is powered on
again. More information about the PDF and BAKPORF bits in the BAKSR register and PORSTF
bit in the RSTCU GRSR register is shown in the following table.

Table 13. Power Status after System Reset

BAKPORF PDF PORSTF
1
0
0
1

Register Map

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

Table 14. PWRCU Register Map

Register
PWRCU Base Address = 0x4006_A000
BAKSR
BAKCR
BAKTEST
LVDCSR
BAKREG0
BAKREG1
BAKREG2
BAKREG3
BAKREG4
BAKREG5
BAKREG6
BAKREG7
BAKREG8
BAKREG9
Rev. 1.10
Power-up for the first time after the backup domain is reset:
0 1 Power on reset when V
software reset command on the backup domain.
Restart from unexpected loss of the 1.5 V power or other reset
0 1
(nRST, WDT, ...)
1 1 Restart from the Power-Down mode.
1 x Reserved
backup power domain.
BAK
Offset
0x100 Backup Domain Status Register
0x104 Backup Domain Control Register
0x108 Backup Domain Test Register
Low Voltage / Brown Out Detect Control and
0x110
Status Register
0x200 Backup Register 0
0x204 Backup Register 1
0x208 Backup Register 2
0x20C Backup Register 3
0x210 Backup Register 4
0x214 Backup Register 5
0x218 Backup Register 6
0x21C Backup Register 7
0x220 Backup Register 8
0x224 Backup Register 9
75 of 590
Description
is applied for the first time or executing
BAK
Description Reset Value
0x0000_0001
0x0000_0000
0x0000_0027
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
November 28, 2018