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R8C/20 Datasheet(PDF) 321 Page - Renesas Technology Corp |
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R8C/20 Datasheet(HTML) 321 Page - Renesas Technology Corp |
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321 / 501 page  R8C/20 Group, R8C/21 Group 16. Clock Synchronous Serial Interface Rev.2.00 Aug 27, 2008 Page 305 of 458 REJ09B0250-0200 Figure 16.18 Initialization in 4-Wire Bus Communication Mode Start SSMR2 register SSUMS bit ← 1 SSSR register ORER bit ← 0(1) SSER register RE bit ← 1 (receive) TE bit ← 1 (transmit) Set bits RIE, TEIE, and TIE End SSER register RE bit ← 0 TE bit ← 0 (2) Set the BIDE bit to 1 in bidirectional mode and set the I/O of the SCS pin by bits CSS0 and CSS1. (1) (1) The MLS bit is set to 0 for MSB-first transfer. The clock polarity and phase are set by bits CPHS and CPOS. (2) NOTE: 1. Write 0 after reading 1 to set the ORER bit to 0. SSMR2 register SCKS bit ← 1 Set bits SOOS, CSS0 to CSS1, and BIDE SSCRH register Set MSS bit SSMR register Set bits CPHS and CPOS MLS bits ← 0 SSCRH register Set bits CKS0 to CKS2 Set RSSTP bit |
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