CHAPTER 12: I/O Port
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 587
Initially Selected Functions for the I/O Port
Table 2-3 describes initially selected functions for each I/O port after reset is released.
Table 2-3 Initially Selected Functions for Each I/O Port after Reset Is Released
Initially Selected Function
TRSTX, TCK, TDI, TMS, TDO
JTAG pin is selected. Pull-up is enabled.
Can be used as an analog input pin. Digital input is cut off
and "0" is input.
Can be used as an oscillation pin. Digital input is cut off and
"0" is input.
All GPIO pins other than the above pins
Digital input. Output is Hi-Z.
Note:
− For the status of pins other than GPIO (MD pins, a reset pin), see Data Sheet of the product used.
All the output selection values of EPFR during reset are "no output".
For sub-oscillation, the other products than TYPE5-M4 see Chapter VBAT Domain.
Relocation Function
− Some input/output of peripheral functions have more than one pin (relocation pin).
One of the pins can be selected by setting EPFR. Figure 2-2 shows the schematic view of
relocation function.
Figure 2-2 Schematic View of Relocation Function
Relocation output pin _0
Peripheral
macro
Output
select
Relocation output pin _1
Relocation output pin _2
Relocation input pin A_0
Peripheral
macro
Relocation input pin A_1
Relocation input pin A_2
Input select
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