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R8C/15 Datasheet(PDF) 176 Page - Renesas Technology Corp

Part # R8C/15
Description  16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / R8C/Tiny SERIES
PDF  277 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

R8C/15 Datasheet(HTML) 176 Page - Renesas Technology Corp

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R8C/14 Group, R8C/15 Group
15. Clock Synchronous Serial I/O with Chip Select (SSU)
Rev.2.10
Jan 19, 2006
Page 164 of 253
REJ09B0164-0210
Figure 15.18
Example of Operation in Data Transmit (4-Wire Bus Communication Mode)
TDRE Bit in
SSSR Register
“0”
“1”
TEND Bit in
SSSR Register
“0”
“1”
Data write to SSTDR register
Process by
Program
SSCK
b0
SSO
• When CPHS bit=0 (data change at even edges), CPOS bit=0 (“H” when clock stops)
b7
SCS
(Output)
SSCK
• When CPHS bit=1 (data change at even edges), CPOS bit=0 (“H” when clock stops)
CPHS, CPOS : Bits in SSMR register
1 Frame
TDRE Bit in
SSSR Register
“0”
“1”
TEND Bit in
SSSR Register
“0”
“1”
Data write to SSTDR register
Process by
Program
1 Frame
High-Impedance
b0
b7
High-Impedance
SCS
(Output)
TXI interrupt request is
generated
b7
b0
SSO
1 Frame
1 Frame
b6
b6
TXI interrupt request is
generated
TEI interrupt request is
generated
b6
b7
b0
b6
TEI interrupt request is
generated
TXI interrupt request is
generated
TXI interrupt request is
generated



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