Smbus Slave Mode - ST STM32F413 Reference Manual

Advanced arm-based 32-bit mcus

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Fast-mode Plus Inter-integrated circuit (FMPI2C) interface

SMBus slave mode

This section is relevant only when SMBus feature is supported. Please refer to

In addition to FMPI2C slave transfer management (refer to

mode) some additional software flowcharts are provided to support SMBus.

SMBus Slave transmitter

When the IP is used in SMBus, SBC must be programmed to '1' in order to allow the PEC

transmission at the end of the programmed number of data bytes. When the PECBYTE bit

is set, the number of bytes programmed in NBYTES[7:0] includes the PEC transmission. In

that case the total number of TXIS interrupts will be NBYTES-1 and the content of the

FMPI2C_PECR register is automatically transmitted if the master requests an extra byte

after the NBYTES-1 data transfer.

The PECBYTE bit has no effect when the RELOAD bit is set.

Figure 266. Transfer sequence flowchart for SMBus slave transmitter N bytes + PEC

implementation.

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Section 26.3:

Section 26.4.7: FMPI2C slave