Chapter 11 Serial Array Unit; Functions Of Serial Array Unit; 3-Wire Serial I/O (Csi00, Csi10) - NEC 78K0R/KE3 User Manual

The serial array unit has four serial channels per unit and can use two or more of various serial interfaces (3-wire
serial (CSI), UART, and simplified I
Function assignment of each channel supported by the 78K0R/KE3 is as shown below (channels 2 and 3 of unit 1
are dedicated to UART3 (supporting LIN-bus)).
Unit Channel
0 0
1
2
3
1 0
1
2
3
(Example of combination) When "UART1" is used for channels 2 and 3 of unit 0, CSI10 and IIC10 cannot be used,

11.1 Functions of Serial Array Unit

Each serial interface supported by the 78K0R/KE3 has the following features.

11.1.1 3-wire serial I/O (CSI00, CSI10)

This is a clocked communication function that uses three lines: serial clock (SCK) and serial data (SI and SO) lines.
[Data transmission/reception]
• Data length of 7 or 8 bits
• Phase control of transmit/receive data
• MSB/LSB first selectable
• Level setting of transmit/receive data
[Clock control]
• Master/slave selection
• Phase control of I/O clock
• Setting of transfer period by prescaler and internal counter of each channel
[Interrupt function]
• Transfer end interrupt/buffer empty interrupt
[Error detection flag]
• Overrun error

CHAPTER 11 SERIAL ARRAY UNIT

2
C) in combination.
Used as CSI
CSI00
−
CSI10
−
−
−
−
−
but CSI00 or UART0 can be used.
User's Manual U17854EJ9V0UD
Used as UART
UART0
UART1
−
−
UART3 (supporting LIN-bus)
2
Used as Simplified I C
−
−
IIC10
−
−
−
−
−
333