RM0444 Rev 5 249/1390
RM0444 System configuration controller (SYSCFG)
269
Bits 31:25 Reserved, must be kept at reset value.
Bit 24 I2C3_FMP: Fast Mode Plus (FM+) enable for I2C3
(1)
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on I/O ports
configured as I2C3 through GPIOx_AFR registers.
0: Disable
1: Enable
With this bit in disable state, the I
2
C FM+ driving capability on I/O ports configured as I2C3
can be enabled through their corresponding I2Cx_FMP bit. When I
2
C FM+ is enabled, the
speed control is ignored.
Bit 23 I2C_PA10_FMP: Fast Mode Plus (FM+) enable for PA10
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on PA10 I/O
port.
0: Disable
1: Enable
With this bit in disable state, the I
2
C FM+ driving capability on this I/O port can be enabled
through one of I2Cx_FMP bits. When I
2
C FM+ is enabled, the speed control is ignored.
Bit 22 I2C_PA9_FMP: Fast Mode Plus (FM+) enable for PA9
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on PA9 I/O port.
0: Disable
1: Enable
With this bit in disable state, the I
2
C FM+ driving capability on this I/O port can be enabled
through one of I2Cx_FMP bits. When I
2
C FM+ is enabled, the speed control is ignored.
Bit 21 I2C2_FMP: Fast Mode Plus (FM+) enable for I2C2
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on I/O ports
configured as I2C2 through GPIOx_AFR registers.
0: Disable
1: Enable
With this bit in disable state, the I
2
C FM+ driving capability on I/O ports configured as I2C2
can be enabled through their corresponding I2Cx_FMP bit. When I
2
C FM+ is enabled, the
speed control is ignored.
Bit 20 I2C1_FMP: Fast Mode Plus (FM+) enable for I2C1
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on I/O ports
configured as I2C1 through GPIOx_AFR registers.
0: Disable
1: Enable
With this bit in disable state, the I
2
C FM+ driving capability on I/O ports configured as I2C1
can be enabled through their corresponding I2Cx_FMP bit. When I
2
C FM+ is enabled, the
speed control is ignored.
Bit 19 I2C_PB9_FMP: Fast Mode Plus (FM+) enable for PB9
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on PB9 I/O port.
0: Disable
1: Enable
With this bit in disable state, the I
2
C FM+ driving capability on this I/O port can be enabled
through one of I2Cx_FMP bits. When I
2
C FM+ is enabled, the speed control is ignored.
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