ST72344S2 datasheet(121/247 Pages) STMICROELECTRONICS

121 / 247 page

ST72344xx, ST2345xx

On-chip peripherals

Doc ID 12321 Rev 6

121/247

Figure 60.

Data clock timing diagram

This figure should not be used as a replacement for parametric information. Refer to Section 13: Electrical

characteristics.

11.4.5

Error flags

Master mode fault (MODF)

Master mode fault occurs when the master device’s SS pin is pulled low.

When a Master mode fault occurs:

●

The MODF bit is set and an SPI interrupt request is generated if the SPIE bit is set.

●

The SPE bit is reset. This blocks all output from the device and disables the SPI

peripheral.

●

The MSTR bit is reset, thus forcing the device into slave mode.

SCK

MSBit

Bit 6

Bit 5

Bit 4

Bit3

Bit 2

Bit 1

LSBit

MSBit

Bit 6

Bit 5

Bit 4

Bit3

Bit 2

Bit 1

LSBit

MISO

(from master)

MOSI

(from slave)

(to slave)

CAPTURE STROBE

CPHA = 1

MSBit

Bit 6

Bit 5

Bit 4

Bit3

Bit 2

Bit 1

LSBit

MSBit

Bit 6

Bit 5

Bit 4

Bit3

Bit 2

Bit 1

LSBit

MISO

(from master)

MOSI

(to slave)

CAPTURE STROBE

CPHA = 0

(from slave)

(CPOL = 1)

SCK

(CPOL = 0)

SCK

(CPOL = 1)

SCK

(CPOL = 0)

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