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General-purpose and alternate-function I/Os (GPIOs and AFIOs)
RM0008
To optimize the number of free GPIOs during debugging, this mapping can be configured in
different ways by programming the SWJ_CFG[1:0] bits in the AF remap and debug I/O
configuration register (AFIO_MAPR) . Refer to Table 33
Table 33.
Debug port mapping
SWJ I/O pin assigned
SWJ _CFG
[2:0]
000
001
010
100
Available debug ports
Full SWJ (JTAG-DP + SW-DP)
(Reset state)
Full SWJ (JTAG-DP + SW-DP)
but without JNTRST
JTAG-DP Disabled and
SW-DP Enabled
JTAG-DP Disabled and
SW-DP Disabled
PA13 /
JTMS/
SWDIO
X
X
X
free
PA14 /
JTCK/S
WCLK
X
X
X
free
PA15 /
JTDI
X
X
free
free
PB3 / JTDO/
TRACE
SWO
X
x
free (1)
free
PB4/
NJTRST
X
free
free
free
Other
Forbidden
1. Released only if not using asynchronous trace.
8.3.6
ADC alternate function remapping
Refer to AF remap and debug I/O configuration register (AFIO_MAPR) .
Table 34.
ADC1 external trigger injected conversion alternate function remapping (1)
Alternate function
ADC1 external trigger injected
conversion
ADC1_ETRGINJ_REMAP = 0
ADC1 external trigger injected
conversion is connected to
EXTI15
ADC1_ETRGINJ_REMAP = 1
ADC1 external trigger injected
conversion is connected to
TIM8_CH4
1. Remap available only for high-density devices.
Table 35.
ADC1 external trigger regular conversion alternate function remapping (1)
Alternate function
ADC1_ETRGREG_REMAP = 0 ADC1_ETRGREG_REMAP = 1
ADC1 external trigger regular
conversion
ADC1 external trigger regular
conversion is connected to
EXTI11
ADC1 external trigger regular
conversion is connected to
TIM8_TRGO
1. Remap available only for high-density devices.
Table 36.
ADC2 external trigger injected conversion alternate function remapping (1)
Alternate function
ADC2 external trigger injected
conversion
ADC2_ETRGINJ_REMAP = 0
ADC2 external trigger injected
conversion is connected to
EXTI 15
ADC2_ETRGINJ_REMAP = 1
ADC2 external trigger injected
conversion is connected to
TIM8_CH4
1. Remap available only for high-density devices.
154/995
Doc ID 13902 Rev 9
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