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16.4.4 2-wire serial I/O mode operation
The 2-wire serial I/O mode supports any communication format by program.
Communication is basically carried out with two lines of serial clock (SCK0) and serial data input/output (SB0 or
SB1).
Figure 16-33. Example of Serial Bus Configuration with 2-Wire Serial I/O
(1) Register setting
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The 2-wire serial I/O mode is set with the serial operating mode register 0 (CSIM0), the serial bus interface control
register (SBIC) and the interrupt timing specification register (SINT).
(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.
372
CHAPTER 16 SERIAL INTERFACE CHANNEL 0 ( µ PD78014Y Subseries)
Master
SCK0
SB0 (SB1)
V
V
DD
DD
SCK0
SB0 (SB1)
Slave
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