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M16C/29 Datasheet(PDF) 232 Page - Renesas Technology Corp

Part # M16C/29
Description  RENESAS MCU M16C FAMILY / M16C/Tiny SERIES
PDF  499 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M16C/29 Datasheet(HTML) 232 Page - Renesas Technology Corp

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14. Serial I/O
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14.1.4.1 Clock Phase Setting Function
One of four combinations of transfer clock phases and polarities can be selected using the CKPH bit
in the U2SMR3 register and the CKPOL bit in the U2C0 register.
Make sure the transfer clock polarity and phase are the same for the master and slave to communi-
cate.
14.1.4.1.1 Master (Internal Clock)
Figure 14.27
shows the transmission and reception timing in master (internal clock).
14.1.4.1.2 Slave (External Clock)
Figure 14.28
shows the transmission and reception timing (CKPH=0) in slave (external clock) while
Figure 14.29
shows the transmission and reception timing (CKPH=1) in slave (external clock).
Figure 14.27 Transmission and Reception Timing in Master Mode (Internal Clock)
Data output timing
Data input timing
D0
D1
D2
D3
D4
D6
D7
D5
Clock output
(CKPOL=0, CKPH=0)
"H"
"L"
Clock output
(CKPOL=1, CKPH=0)
"H"
"L"
Clock output
(CKPOL=0, CKPH=1)
"H"
"L"
Clock output
(CKPOL=1, CKPH=1)
"H"
"L"
"H"
"L"



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