Gpio Locking Mechanism; Register Map; Table 21. Gpio Register Map - Holtek HT32F52220 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52220/HT32F52230

GPIO Locking Mechanism

The GPIO also offers a lock function to lock the port until a reset event occurs. The PxLOCKR (x
= A ~ B) registers are used to lock the port x and lock control options. The value 0x5FA0 is written
into the PxLKEY field in the PxLOCKR registers to freeze the PxDIRCR, PxINER, PxPUR,
PxPDR, PxODR, PxDRVR control and AFIO mode configuration (GPxCFGHR or GPxCFGLR,
where x = A ~ B). If the value in the PxLOCKR register is 0x5FA0_0001, it means that the Port x
Lock function is enabled and the Port x pin 0 is frozen

Register Map

The following table shows the GPIO registers and reset values of the Port A ~ B.

Table 21. GPIO Register Map

Register
GPIO A Base Address = 0x400B_0000
PADIRCR 0x000
PAINER 0x004
PAPUR 0x008
PAPDR 0x00C
PAODR 0x010
PADRVR 0x014
PALOCKR 0x018
PADINR 0x01C
PADOUTR 0x020
PASRR 0x024
PARR 0x028
GPIO B Base Address = 0x400B_2000
PBDIRCR 0x000
PBINER 0x004
PBPUR 0x008
PBPDR 0x00C
PBODR 0x010
PBDRVR 0x014
PBLOCKR 0x018
PBDINR 0x01C
PBDOUTR 0x020
PBSRR 0x024
PBRR 0x028
Rev. 1.10
Offset
Port A Data Direction Control Register
Port A Input Function Enable Control Register
Port A Pull-Up Selection Register
Port A Pull-Down Selection Register
Port A Open Drain Selection Register
Port A Drive Current Selection Register
Port A Lock Register
Port A Data Input Register
Port A Data Output Register
Port A Output Set and Reset Control Register
Port A Output Reset Control Register
Port B Data Direction Control Register
Port B Input Function Enable Control Register
Port B Pull-Up Selection Register
Port B Pull-Down Selection Register
Port B Open Drain Selection Register
Port B Drive Current Selection Register
Port B Lock Register
Port B Data Input Register
Port B Data Output Register
Port B Output Set and Reset Control Register
Port B Output Reset Control Register
107 of 366
Description Reset Value
0x0000_0000
0x0000_0200
0x0000_3200
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_3200
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
0x0000_0000
November 09, 2018