upd78f0114hgb-8es-a Renesas Electronics Corporation., upd78f0114hgb-8es-a Datasheet - Page 253
upd78f0114hgb-8es-a
Manufacturer Part Number
upd78f0114hgb-8es-a
Description
8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0114HGB-8ES-A.pdf
(505 pages)
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12.4.2 Asynchronous serial interface (UART) mode
baud rates.
(1) Registers used
POWER0
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 BRGC0 register (see Figure 12-4).
<2> Set bits 1 to 4 (SL0, CL0, PS00, and PS01) of the ASIM0 register (see Figure 12-2).
<3> Set bit 7 (POWER0) of the ASIM0 register to 1.
<4> Set bit 6 (TXE0) of the ASIM0 register to 1.
<5> Write data to the TXS0 register.
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 0 (ASIM0)
Asynchronous serial interface reception error status register 0 (ASIS0)
Baud rate generator control register 0 (BRGC0)
Port mode register 1 (PM1)
Port register 1 (P1)
Set bit 5 (RXE0) of the ASIM0 register to 1.
TXE0
POWER0: Bit 7 of asynchronous serial interface operation mode register 0 (ASIM0)
TXE0:
RXE0:
PM1×:
P1×:
0
0
1
1
and port register.
RXE0
0
1
0
1
don’t care
Bit 6 of ASIM0
Port mode register
Bit 5 of ASIM0
Port output latch
Table 12-2. Relationship Between Register Settings and Pins
PM10
×
×
Note
Note
0
0
CHAPTER 12 SERIAL INTERFACE UART0
P10
×
×
Note
Note
1
1
Data transmission is started.
User’s Manual U16961EJ4V0UD
PM11
×
×
Note
1
Note
1
Transmission is enabled.
Reception is enabled.
P11
×
×
×
Note
Note
×
Transmission/
Transmission
Reception
Operation
reception
UART0
Stop
TxD0/SCK10/P10
SCK10/P10
SCK10/P10
TxD0
TxD0
Pin Function
RxD0/SI10/P11
SI10/P11
SI10/P11
RxD0
RxD0
253
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