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13.4.2 3-wire serial I/O mode operation
The 3-wire serial I/O mode is used for connection of peripheral ICs and display controllers that incorporate
a clocked serial interface.
Communication is carried out using three lines: a serial clock (SCK0), serial output (SO0), and serial input
(SI0).
(1) Register setting
The 3-wire serial I/O mode is set by serial operating mode register 0 (CSIM0) and serial bus interface
control register (SBIC).
(a) Serial operating mode register 0 (CSIM0)
CSIM0 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets CSIM0 to 00H.
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CHAPTER 13 SERIAL INTERFACE CHANNEL 0
User's Manual U11302EJ4V0UM
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