MC-78F0712-KIT Renesas Electronics America, MC-78F0712-KIT Datasheet - Page 237

• 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

<R>
14.4.2 Asynchronous serial interface (UART) mode
baud rates.
(1) Registers used
POWER00 TXE00
In this mode, 1-byte data is transmitted/received following a start bit, and a full-duplex operation can be performed.
A dedicated UART baud rate generator is incorporated, so that communication can be executed at a wide range of
Note Can be set as port function.
Remark ×:
0
1
The basic procedure of setting an operation in the UART mode is as follows.
<1> Set the BRGC00 register (see Figure 14-4).
<2> Set bits 1 to 4 (SL00, CL00, PS000, and PS001) of the ASIM00 register (see Figure 14-2).
<3> Set bit 7 (POWER00) of the ASIM00 register to 1.
<4> Set bit 6 (TXE00) of the ASIM00 register to 1.
<5> Write data to the TXS00 register at least two clock after setting <4>.
Caution Take relationship with the other party of communication when setting the port mode register
The relationship between the register settings and pins is shown below.
Asynchronous serial interface operation mode register 00 (ASIM00)
Asynchronous serial interface reception error status register 00 (ASIS00)
Baud rate generator control register 00 (BRGC00)
Port mode register 1 (PM1)
Port register 1 (P1)
Set bit 5 (RXE00) of the ASIM00 register to 1.
POWER00: Bit 7 of asynchronous serial interface operation mode register 00 (ASIM00)
TXE00:
RXE00:
PM1×:
P1×:
0
0
1
1
and port register.
RXE00
0
1
0
1
Table 14-2. Relationship Between Register Settings and Pins
don’t care
Bit 6 of ASIM00
Bit 5 of ASIM00
Port mode register
Port output latch
PM14
×
×
Note
Note
0
0
CHAPTER 14 SERIAL INTERFACE UART00
P14
×
×
Note
Note
1
1
User’s Manual U17890EJ2V0UD
PM13
×
×
Note
1
Note
1
Transmission is enabled.
Reception is enabled.
P13
×
×
Note
×
Note
×
Transmission/
Transmission
Reception
Operation
reception
UART00
Stop
Data transmission is started.
TxD00/ P14
TxD00
TxD00
P14
P14
Pin Function
RxD00/P13
RxD00
RxD00
P13
P13
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