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Cypress FM4 Series - Functions Initially Assigned to Pins

Cypress FM4 Series
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CHAPTER 16: Debug Interface
920 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
2.3 Functions Initially Assigned to Pins
SWJ-DP/SW-DP/ETM/HTM/Trace pins are also as GPIO.
SWJ-DP/SW-DP/Trace pins are initially dedicated to debug function, whereas ETM/HTM pins are not
initially dedicated to that.
When using this series, please configure these ETM pins to provide the debug function.
Note:
For details on how to set the debug function, see Chapter I/O Port
Table 2-4 shows initial states after resets are cleared and the functions that can be changed by setting
PFRs (Port function registers).
Note:
For details on the PFRs, see chapter I/O Port.
Table 2-4 Functions Initially Assigned to Pins for Debugging Purposes and Change of Function
Pin Name
Initially Assigned Pin Function
Change of Function by Setting the PFR
SWI-DP
pins
TCK/SWCLK
TCK/SWCLK
GPIO
TMS/SWDIO
TMS/SWDIO
GPIO
TDI
TDI
GPIO
TDO/SWO
TDO/SWO
GPIO
TRSTX
TRSTX
GPIO
SW-DP/
Trace pins
SWCLK
SWCLK
GPIO
SWDIO
SWDIO
GPIO
SWO
SWO
GPIO
ETM/HTM
pins
TRACED0
GPIO
TRACED0
TRACED1
GPIO
TRACED1
TRACED2
GPIO
TRACED2
TRACED3
GPIO
TRACED3
TRACED4
GPIO
TRACED4
TRACED5
GPIO
TRACED5
TRACED6
GPIO
TRACED6
TRACED7
GPIO
TRACED7
TRACED8
GPIO
TRACED8
TRACED9
GPIO
TRACED9
TRACED10
GPIO
TRACED10
TRACED11
GPIO
TRACED11
TRACED12
GPIO
TRACED12
TRACED13
GPIO
TRACED13
TRACED14
GPIO
TRACED14
TRACED15
GPIO
TRACED15
TRACECLK
GPIO
TRACECLK

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