STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

General-purpose and alternate-function I/Os (GPIOs and AFIOs)
RM0008
Bit 0 SPI1_REMAP: SPI1 remapping
This bit is set and cleared by software. It controls the mapping of SPI1 NSS, SCK, MISO,
MOSI alternate functions on the GPIO ports.
0: No remap (NSS/PA4, SCK/PA5, MISO/PA6, MOSI/PA7)
1: Remap (NSS/PA15, SCK/PB3, MISO/PB4, MOSI/PB5)
Memory map and bit definitions for connectivity line devices:
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res.
PTP_P
PS_RE
MAP
TIM2IT
R1_
IREMA
P
SPI3_
SWJ_
REMAP Res. CFG[2:0]
MII_RMI
I_SEL
CAN2_
REMAP
ETH_R
EMAP
Reserved
rw rw rw w w w rw rw rw rw
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
PD01_
REMAP
CAN1_REMAP
[1:0]
TIM4_
REMAP
TIM3_REMAP
[1:0]
TIM2_REMAP
[1:0]
TIM1_REMAP
[1:0]
USART3_
REMAP[1:0]
USART
2_
REMAP
USART
1_
REMAP
I2C1_
REMAP
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
TIM5CH
4_IREM
AP
SPI1_
REMAP
Bit 31
Reserved
Bit 30 PTP_PPS_REMAP: Ethernet PTP PPS remapping
This bit is set and cleared by software. It enables the Ethernet MAC PPS_PTS to be output
on the PB5 pin.
0: PTP_PPS not output on PB5 pin.
1: PTP_PPS is output on PB5 pin.
Note: This bit is available only in connectivity line devices and is reserved otherwise.
Bit 29 TIM2ITR1_IREMAP: TIM2 internal trigger 1 remapping
This bit is set and cleared by software. It controls the TIM2_ITR1 internal mapping.
0: Connect TIM2_ITR1 internally to the Ethernet PTP output for calibration purposes.
1: Connect USB OTG SOF (Start of Frame) output to TIM2_ITR1 for calibration purposes.
Note: This bit is available only in connectivity line devices and is reserved otherwise.
Bit 28 SPI3_REMAP: SPI3 remapping
This bit is set and cleared by software. It controls the mapping of SPI3 NSS, SCK, MISO,
MOSI alternate functions on the GPIO ports.
0: No remap (NSS/PA15, SCK/PB3, MISO/PB4, MOSI/PB5)
1: Remap (NSS/PA4, SCK/PC10, MISO/PC11, MOSI/PC12)
Note: This bit is available only in connectivity line devices and is reserved otherwise.
Bit 27
Reserved
Bits 26:24 SWJ_CFG[2:0]: Serial wire JTAG configuration
These bits are write-only (when read, the value is undefined). They are used to configure the
SWJ and trace alternate function I/Os. The SWJ (Serial Wire JTAG) supports JTAG or SWD
access to the Cortex debug port. The default state after reset is SWJ ON without trace. This
allows JTAG or SW mode to be enabled by sending a specific sequence on the JTMS /
JTCK pin.
000: Full SWJ (JTAG-DP + SW-DP): Reset State
001: Full SWJ (JTAG-DP + SW-DP) but without JNTRST
010: JTAG-DP Disabled and SW-DP Enabled
100: JTAG-DP Disabled and SW-DP Disabled
Other combinations: no effect
162/995 Doc ID 13902 Rev 9