CHAPTER 12: I/O Port
736 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
4.42 Port Pseudo Open Drain Setting Register (PZRx)
PZRx register makes I/O port Hi-Z when output is High level and sets pseudo open drain control.
List of PZR register configuration
Details of Register Configuration
Register Function
[bit31:16] Reserved: Reserved bits
0x0000 is read from these bits.
When writing these bits, set them to 0x0000.
[bit15:0] PZRx: Port Pseudo Open Drain Setting Register x
Sets the pseudo open drain of the pin.
Reads out the register value.
Set the pin to High level when outputting digital High level by GPIO or peripheral macro.
Set the pin to Hi-Z when outputting digital High level by GPIO or peripheral macro.
Disconnect the pull-up resistor regardless of the PCR setting.
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