ยตPD784214A, 784215A, 784216A, 784217A, 784218A, 784214AY, 784215AY, 784216AY, 784217AY, 784218AY
7.7.2 Clocked serial interface (CSI)
In this mode, the master device starts transfer by making the serial clock active and transfers 1-byte data in
synchronization with this clock.
(1) 3-wire serial I/O mode
This mode is to communicate with devices having a conventional clocked serial interface.
Basically, communication is established in this mode with three lines: serial clock (SCK0) serial data input
(SI0), and serial data output (SO0) lines.
Generally, a handshake line is necessary to check the reception status.
Figure 7-12. Block Diagram in 3-Wire Serial I/O Mode
SI0
SO0
SCK0
Internal bus
8
Serial I/O shift register 0
(SIO0)
Serial clock
counter
Serial clock
controller
Interrupt
generator
Selector
INTCSI0
TO2
fXX/8
fXX/16
Data Sheet U14121EJ2V0DS00
47