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Chapter 5 Serial Functions
99
Synchronous Serial Interface
5-2-3 Serial Interface Transfer Timing
Serial interface 0 uses the SC0CE0 and SC0CE1 flags of serial interface 0 mode
register 0 (SC0MD0), to control the edge at which transmission data is output and
the edge at which reception data is input.
During transmission, when the SCnCE1 flag is "0," data output is synchronized to
the falling edge of the clock.
During reception, when the SCnCE0 flag is "0," data reception is synchronized to
the opposite polarity edge of the transmit data edge. When the SCnCE0 flag is "1,"
data reception is synchronized to the same polarity edge as the transmit data edge.
Table 5-2-1 Serial Data Input Edge and Output Edge (serial interface 0)
SC0CE0 SC0CE1
Receive Data Input Edge
Transmit Data Output Edge
0
1
0
0
0
1
1
1