System configuration controller (SYSCFG) RM0444
250/1390 RM0444 Rev 5
Bit 18 I2C_PB8_FMP: Fast Mode Plus (FM+) enable for PB8
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on PB8 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 17 I2C_PB7_FMP: Fast Mode Plus (FM+) enable for PB7
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on PB7 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 16 I2C_PB6_FMP: Fast Mode Plus (FM+) enable for PB6
This bit is set and cleared by software. It enables I
2
C FM+ driving capability on PB6 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.
Bits 15:11 Reserved, must be kept at reset value.
Bit 10 UCPD2_STROBE: UCPD2 pull-down configuration strobe
(1)
Upon power on, internal pull-down resistors on UCPD2 CC1 and CC2 pins are enabled
(connected).
The action of setting this bit has the following “strobing” effect:
- when UCPD2 is disabled: disable UCPD pull-down resistors on CC1 and CC2
- when UCPD2 is enabled, with CC1 and CC2 pin UCPD control bits configured: apply that
configuration
See Section 38: USB Type-C™ / USB Power Delivery interface (UCPD) for details.
Bit 9 UCPD1_STROBE: UCPD1 pull-down configuration strobe
(1)
Upon power on, internal pull-down resistors on UCPD1 CC1 and CC2 pins are enabled
(connected).
The action of setting this bit has the following “strobing” effect:
- when UCPD1 is disabled: disable UCPD pull-down resistors on CC1 and CC2
- when UCPD1 is enabled, with CC1 and CC2 pin UCPD control bits configured: apply that
configuration
See Section 38: USB Type-C™ / USB Power Delivery interface (UCPD) for details.
Bit 8 BOOSTEN: I/O analog switch voltage booster enable
This bit selects the way of supplying I/O analog switches:
0: V
DD
1: Dedicated voltage booster (supplied by V
DD
)
When using the analog inputs , setting to 0 is recommended for high V
DD
, setting to 1 for low
V
DD
(less than 2.4 V).
Bits 7:6 IR_MOD[1:0]: IR Modulation Envelope signal selection
This bitfield selects the signal for IR modulation envelope:
00: TIM16
01: USART1
10: USART4 on STM32G071xx and STM32G081xx as well as STM32G0B1xx and
STM32G0C1xx, USART2 on STM32G031xx and STM32G041xx as well as STM32G051xx
and STM32G061xx
11: Reserved
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