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Preliminary User’s Manual U13420EJ2V0UM00
CHAPTER 13 SERIAL INTERFACE (UART0)
13.1 Serial Interface (UART0) Functions
The serial interface (UART0) has the following three modes.
(1) Operation stop mode
This mode is used when serial transfers are not performed to reduce power consumption.
For details, see 13.4.1 Operation stop mode.
(2) Asynchronous serial interface (UART) mode
This mode enables full-duplex operation wherein one byte of data after the start bit is transmitted and received.
The on-chip baud rate generator dedicated to UART enables communications using a wide range of selectable
baud rates. In addition, a baud rate can also be defined by dividing clocks input to the ASCK0 pin.
The UART baud rate generator can also be used to generate a MIDI-standard baud rate (31.25 kbps).
For details, see 13.4.2 Asynchronous serial interface (UART) mode.
(3) Infrared data transfer mode
For details, see 13.4.3 Infrared data transfer mode.
Figure 13-1 shows a block diagram of the serial interface (UART0) macro.
Figure 13-1. Serial Interface (UART0) Block Diagram
Internal bus
Receive
buffer
register
(RXB0)
RxD0/P73
TxD0/P72
Receive
shift
register
(RX0)
PE0 FE0 OVE0
Asynchronous
serial interface
status register
(ASIS0)
INTSER0
INTST0
Baud rate
generator
ASCK0/P71
f
X
/2 to f
X
/2
7
TXE0 RXE0 PS01 PS00 CL0
SL0 ISRM0 IRDAM0
Asynchronous serial interface
mode register (ASIM0)
INTSR0
Receive
controller
(parity
check)
Transmit
shift
register
(TXS0)
Transmit
controller
(parity
addition)
Содержание mPD780065 Series
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