ST STM32F101 series Reference Manual page 188

RM0008
Bit 23 MII_RMII_SEL: MII or RMII selection
Note: This bit is available only in connectivity line devices and is reserved otherwise.
Bit 22 CAN2_REMAP: CAN2 I/O remapping
Note: This bit is available only in connectivity line devices and is reserved otherwise.
Bit 21 ETH_REMAP: Ethernet MAC I/O remapping
Note: This bit is available only in connectivity line devices and is reserved otherwise.
Bits 20:17 Reserved
Bits 16 TIM5CH4_IREMAP: TIM5 channel4 internal remap
Bit 15 PD01_REMAP: Port D0/Port D1 mapping on OSC_IN/OSC_OUT
Bits 14:13 CAN1_REMAP[1:0]: CAN1 alternate function remapping
Bit 12 TIM4_REMAP: TIM4 remapping
Note: TIM4_ETR on PE0 is not re-mapped.
General-purpose and alternate-function I/Os (GPIOs and AFIOs)
This bit is set and cleared by software. It configures the Ethernet MAC internally for use with
an external MII or RMII PHY.
0: Configure Ethernet MAC for connection with an MII PHY
1: Configure Ethernet MAC for connection with an RMII PHY
This bit is set and cleared by software. It controls the CAN2_TX and CAN2_RX pins.
0: No remap (CAN2_RX/PB12, CAN2_TX/PB13)
1: Remap (CAN2_RX/PB5, CAN2_TX/PB6)
This bit is set and cleared by software. It controls the Ethernet MAC connections with the
PHY.
0: No remap (RX_DV-CRS_DV/PA7, RXD0/PC4, RXD1/PC5, RXD2/PB0, RXD3/PB1)
1: Remap (RX_DV-CRS_DV/PD8, RXD0/PD9, RXD1/PD10, RXD2/PD11, RXD3/PD12)
Set and cleared by software. This bit controls the TIM5_CH4 internal mapping. When reset
the timer TIM5_CH4 is connected to PA3. When set the LSI internal clock is connected to
TIM5_CH4 input for calibration purpose.
This bit is set and cleared by software. It controls the mapping of PD0 and PD1 GPIO
functionality. When the HSE oscillator is not used (application running on internal 8 MHz RC)
PD0 and PD1 can be mapped on OSC_IN and OSC_OUT. This is available only on 36-, 48-
and 64-pin packages (PD0 and PD1 are available on 100-pin and 144-pin packages, no
need for remapping).
0: No remapping of PD0 and PD1
1: PD0 remapped on OSC_IN, PD1 remapped on OSC_OUT,
These bits are set and cleared by software. They control the mapping of alternate functions
CAN1_RX and CAN1_TX.
00: CAN1_RX mapped to PA11, CAN1_TX mapped to PA12
01: Not used
10: CAN1_RX mapped to PB8, CAN1_TX mapped to PB9 (not available on 36-pin package)
11: CAN1_RX mapped to PD0, CAN1_TX mapped to PD1
This bit is set and cleared by software. It controls the mapping of TIM4 channels 1 to 4 onto
the GPIO ports.
0: No remap (TIM4_CH1/PB6, TIM4_CH2/PB7, TIM4_CH3/PB8, TIM4_CH4/PB9)
1: Full remap (TIM4_CH1/PD12, TIM4_CH2/PD13, TIM4_CH3/PD14, TIM4_CH4/PD15)
DocID13902 Rev 15 188/1128
195