R8CSLASH15 datasheet(174/277 Pages) RENESAS

Part #	R8C/15

Description	16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / R8C/Tiny SERIES

PDF	277 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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174 / 277 page

R8C/14 Group, R8C/15 Group

15. Clock Synchronous Serial I/O with Chip Select (SSU)

Rev.2.10

Jan 19, 2006

Page 162 of 253

REJ09B0164-0210

Figure 15.17

Initialization in 4-Wire Bus Communication Mode

Start

SSMR2 register

SSUMS bit

← 1

SSCRH register

Set CKS0 to CKS2 bits

SSSR register

ORER bit

← 0(1)

SSER register

RE bit

← 1 (when receive)

TE bit

← 1 (when transmit)

Set RIE, TEIE and TIE bits

End

SSER register

RE bit

← 0

TE bit

← 0

SSCRH register

Set RSSTP bit

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

the I/O of the #SCS pin is set by the CSSO to

CSS1 bits.

(1)

(1) The MLS bit is set to “0” for the MSB-first

transfer. The clock polarity and phase are set by

the CPHS and CPOS bits.

(2)

NOTES:

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

SSMR2 register

SCKS bit

← 1

Set SOOS, CSS to

CSS1 and BIDE bits

SSCRH register

Set MSS bit

SSMR register

Set CPHS and CPOS bits

MLS bits

← 0

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