RAA271000 datasheet(21/105 Pages) RENESAS

Part #	RAA271000

Description	General-Purpose Power Management IC for Automotive Applications

PDF	105 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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21 / 105 page

R16DS0051EU0101 Rev.1.01

Page 21

May 23, 2022

RAA271000 Datasheet

6.1.2

SPI Configuration

The following register bits configure the SPI operation:

▪ IO_SPICPOL: SPI clock polarity, RAA271000 is configured as active high, IO_SPICPOL = 0.

▪ IO_SPICPHA: SPI clock phase, RAA271000 samples data on rising edge of SPI clock, IO_SPICPHA = 0.

The four possible modes of clocking are shown in Figure 15.

▪ IO_SPIRWPOL: R/W bit polarity, RAA271000 SPI_RWPOL is set to 0, 1: Read, 0: Write.

▪ IO_SPIMODE: Packet length enable. The RAA271000 uses packet length mode by default, which means, the

third data byte from master is the packet length and indicates the total number of data words to be

sent/received in a burst transaction.

Figure 15. Four Possible Clocking Modes

Table 5. SPI_RWPOL R/W Bit Settings

SPI_RWPOL

R/W

Operation

Write

Read

SS_B

SPI_CLK:IO_SPICPOL = 0

SPI_CLK:IO_SPICPOL = 1

MISO:IO_SPIPCPHA = 0

MOSI:IO_SPIPCPHA = 0

MISO:IO_SPIPCPHA = 1

MOSI:IO_SPIPCPHA = 1

RAA271000 Datasheet(PDF) 21 Page - Renesas Technology Corp