I2C4EN=B_0x0, LPUART1EN=B_0x0, UCPD1EN=B_0x0
APB1 peripheral clock enable register 2
| LPUART1EN | Low power UART 1 clock enable Set and cleared by software. 0 (B_0x0): LPUART1 clock disable 1 (B_0x1): LPUART1 clock enable |
| I2C4EN | I2C4 clock enable Set and cleared by software 0 (B_0x0): I2C4 clock disabled 1 (B_0x1): I2C4 clock enabled |
| UCPD1EN | UCPD1 clock enable Set and cleared by software. 0 (B_0x0): UCPD1 clock disable 1 (B_0x1): UCPD1 clock enable |