35.3.6 Port Data Direction Register (GPIOx_PDDR)
The PDDR configures the individual port pins for input or output.
Address: Base a 14h offset
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
GPIOx_PDDR field descriptions
Field
Description
PDD
Port Data Direction
Configures individual port pins for input or output.
0
Pin is configured as general-purpose input, for the GPIO function.
1
Pin is configured as general-purpose output, for the GPIO function.
35.4 FGPIO memory map and register definition
The GPIO registers are also aliased to the IOPORT interface on the Cortex-M0+ from
address 0xF800_0000.
Accesses via the IOPORT interface occur in parallel with any instruction fetches and will
therefore complete in a single cycle. This aliased Fast GPIO memory map is called
FGPIO.
Any read or write access to the FGPIO memory space that is outside the valid memory
map results in a bus error. All register accesses complete with zero wait states, except
error accesses which complete with one wait state.
FGPIO memory map
Absolute
address
(hex)
Register name
Width
(in bits)
Access Reset value
Section/
page
F800_0000 Port Data Output Register (FGPIOA_PDOR)
32
R/W
0000_0000h
F800_0004 Port Set Output Register (FGPIOA_PSOR)
32
W
(always
reads 0)
0000_0000h
F800_0008 Port Clear Output Register (FGPIOA_PCOR)
32
W
(always
reads 0)
0000_0000h
Table continues on the next page...
FGPIO memory map and register definition
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
720
NXP Semiconductors
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