ST STM32L4x6

Inter-integrated circuit (I2C) interface RM0351
1152/1693 DocID024597 Rev 3
When the SMBus master wants to send a RESTART condition after the PEC, software
mode must be selected (AUTOEND=0). In this case, once NBYTES-1 have been
transmitted, the I2C_PECR register content is transmitted and the TC flag is set after the
PEC transmission, stretching the SCL line low. The RESTART condition must be
programmed in the TC interrupt subroutine.
Caution: The PECBYTE bit has no effect when the RELOAD bit is set.
Figure 380. Bus transfer diagrams for SMBus master transmitter
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