PD780701Y_15 Datasheet, PDF (30/66 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD780701Y, 780702Y
4.6 Serial Interfaces
Four serial interface channels are incorporated.
• Serial interface UART0
• Serial interfaces SIO30, SIO31
• Serial interface IIC0
(1) Serial interface UART0
The serial interface UART0 has the asynchronous serial interface (UART) mode.
• Asynchronous serial interface (UART) mode
This mode enables full-duplex operation wherein one byte of data is transmitted and received after the start
bit.
The on-chip dedicated UART baud rate generator enables communication using a wide range of selectable
baud rates.
In addition, a baud rate can also be defined by dividing the clock input to the ASCK0 pin.
The dedicated UART baud rate generator can also be used to generate a MIDI-standard baud rate (31.25
kbps).
Figure 4-12. Block Diagram of Serial Interface UART0
Receive
RXB0
buffer
register 0
Internal bus
ASIM0
TXE0 RXE0 PS01 PS00 CL0 SL0 ISRM0
RxD0/P24
RX0 ^Receive
ASIS0
shift PE0 FE0 OVE0
register 0
TXS0
Transmit
shift
register 0
TxD0/P25
Receive
control
parity
check
INTSR0
INTSER0 ^Transmit
control
parity
addition
INTST0
Baud rate
generator
P26/ASCK0
fX/2² to fX/2⁸
28
Preliminary Product Information U13920EJ1V0PM00