CHAPTER 11 SERIAL INTERFACE FUNCTION
User’s Manual U14359EJ4V0UM
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11.3.6 System configuration example
CSIn performs 8-bit length data transfer using three signal lines: a serial clock (SCKn), serial input (SIn), and serial
output (SOn). This is effective when connecting peripheral I/O that incorporate a conventional clocked serial interface,
or a display controller to the V850E/MA1 (n = 2 to 0).
When connecting the V850E/MA1 to several devices, lines for handshake are required.
Since the first communication bit can be selected as an MSB or LSB, communication with various devices can be
achieved.
Figure 11-18. System Configuration Example of CSI
SCK
Master CPU
Slave CPU
(3-wire serial I/O
3-wire serial I/O)
SO
SI
Port (interrupt)
Port
SI
SO
Port
Port (interrupt)
SCK
