R8C27 Datasheet, PDF(300/485 Page) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES

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R8C27 Datasheet, PDF (300/485 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES

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R8C/26 Group, R8C/27 Group

16. Clock Synchronous Serial Interface

Start

SSER register

RE bit â 0

TE bit â 0

SSMR2 register SSUMS bit â 1

(1)

SSMR register Set bits CPHS and CPOS

(1) The MLS bit is set to 0 for MSB-first transfer.

MLS bits â 0

The clock polarity and phase are set by bits

CPHS and CPOS.

SSCRH register

Set MSS bit

SSMR2 register SCKS bit â 1

(2) Set the BIDE bit to 1 in bidirectional mode and

(2)

Set bits SOOS, CSS0 to

CSS1, and BIDE

set the I/O of the SCS pin by bits CSS0 and

CSS1.

SSCRH register Set bits CKS0 to CKS2

Set RSSTP bit

SSSR register

ORER bit â 0(1)

SSER register

RE bit â 1 (receive)

TE bit â 1 (transmit)

Set bits RIE, TEIE, and TIE

End

NOTE:

1. Write 0 after reading 1 to set the ORER bit to 0.

Figure 16.18 Initialization in 4-Wire Bus Communication Mode

Rev.2.10 Sep 26, 2008 Page 283 of 453

REJ09B0278-0210

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