MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 227

• Manufacturer Part Number: MC-78F0712-KIT
• Description: KIT REF SYSTEM 78K0 UPD78F0712
• Manufacturer: Renesas Electronics America

Specifications of MC-78F0712-KIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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14.1 Functions of Serial Interface UART00
(1) Operation stop mode
(2) Asynchronous serial interface (UART) mode
Serial interface UART00 has the following two modes.
This mode is used when serial communication is not executed and can enable a reduction in the power
consumption.
For details, see 14.4.1 Operation stop mode.
The functions of this mode are outlined below.
For details, see 14.4.2
generator.
Cautions 1. If source clock to serial interface UART00 is not stopped (e.g., in the HALT mode), normal
Two-pin configuration
Length of communication data can be selected from 7 or 8 bits.
Dedicated on-chip 5-bit baud rate generator allowing any baud rate to be set
Transmission and reception can be performed independently.
Four operating clock inputs selectable
Fixed to LSB-first communication
2. Set POWER00 = 1 and then set TXE00 = 1 (transmission) or RXE00 = 1 (reception) to start
3. TXE00 and RXE00 are synchronized by the base clock (f
4. Set transmit data to TXS00 at least two base clock (f
operation continues. If source clock to serial interface UART00 is stopped (e.g., in the
STOP mode), each register stops operating, and holds the value immediately before clock
supply was stopped. The T
was stopped and outputs it. However, the operation is not guaranteed after clock supply is
resumed. Therefore, reset the circuit so that POWER00 = 0, RXE00 = 0, and TXE00 = 0.
communication.
transmission or reception again, set TXE00 or RXE00 to 1 at least two clocks of base clock
after TXE00 or RXE00 has been cleared to 0. If TXE00 or RXE00 is set within two clocks of
base clock, the transmission circuit or reception circuit may not be initialized.
Asynchronous serial interface (UART) mode and 14.4.3
T
CHAPTER 14 SERIAL INTERFACE UART00
RxD00: Receive data input pin
X
D00: Transmit data output pin
User’s Manual U17890EJ2V0UD
X
D00 pin also holds the value immediately before clock supply
XCLK0
) after setting TXE00 = 1.
XCLK0
) set by BRGC00. To enable
Dedicated baud rate
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