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M16C/26 Datenblatt(PDF) 131 Page - Renesas Technology Corp

Teilenummer M16C/26
Bauteilbeschribung  16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES
PDF  239 Pages
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Hersteller  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M16C/26 Datenblatt(HTML) 131 Page - Renesas Technology Corp

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Clock Synchronous Serial I/O Mode
125
Renesas Technology Corp.
M16C/26 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Under
development
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative and subject to change.
(a) Polarity select function
As shown in Figure 1.15.13, the CLK polarity select bit (bit 6 at addresses 03A416, 03AC16, 037C16)
allows selection of the polarity of the transfer clock.
2. When CLK polarity select bit = 1
Note 2: The CLKi pin level when not
transferring data is L .
D1
D2
D3
D4
D5
D6
D7
D1
D2
D3
D4
D5
D6
D7
D0
D0
TXDi
RXDi
CLKi
1. When CLK polarity select bit = 0
Note 1: The CLKi pin level when not
transferring data is H .
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
D0
TXDi
RXDi
CLKi
Figure 1.15.13. Polarity of transfer clock
(b) LSB first/MSB first select function
As shown in Figure 1.15.14, when the transfer format select bit (bit 7 at addresses 03A416, 03AC16,
037C16) = “0”, the transfer format is “LSB first”; when the bit = “1”, the transfer format is “MSB first”.
Figure 1.15.14. Transfer format
LSB first
1. When transfer format select bit = 0
D0
D0
D1
D2
D3
D4
D5
D6
D7
D1
D2
D3
D4
D5
D6
D7
TXDi
RXDi
CLKi
2. When transfer format select bit = 1
D6
D5
D4
D3
D2
D1
D0
D7
D7
D6
D5
D4
D3
D2
D1
D0
TXDi
RXDi
CLKi
MSB first
Note: This applies when the CLK polarity select bit = 0 .



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