R01AN1504EJ0100 Datasheet, PDF (3/50 Pages) Renesas Technology Corp – Using the DTC to Perform Continuous Clock

RL78/G14
Using the DTC to Perform Continuous Clock
Synchronous Serial Communication
1. Specifications
In this application note, the serial array unit (SAU) and DTC are used to successively transmit and receive 8-bit data.
The SAU is used as a 3-wire serial I/O interface to output a transfer clock from the SCK00 pin, output transmit data
from the SO00 pin, and input receive data to the SI00 pin.
The DTC transfers transmit data and receive data from the transmission source address to the destination address. The
DTC is activated by the 3-wire serial I/O interface transfer end.
Table 1.1 lists the peripherals functions and their applications. Figure 1.1 shows the timing and communication format.
Table 1.1 Peripheral Functions and Their Applications
Peripheral Function
SAU (unit 0, channel 0)
DTC
Application
Performs clock synchronous serial communication
Transfers transmit data and receive data
Transmit/receive
First byte
Second
byte
Third byte
Fourth
byte
Fifth byte Sixth byte
Seventh
byte
Eighth
byte
SCK00 pin
SO00 pin
SI00 pin
104 µs (9600 bps)
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Figure 1.1 Timing and Communication Format
DTC is activated
(Transfers the transmit and receive data)
R01AN1504EJ0100 Rev. 1.00
Feb. 14, 2014
Page 3 of 47