169
Preliminary User’s Manual U14581EJ3V0UM00
CHAPTER 13 SERIAL INTERFACE UART
13.1 Serial Interface Functions
The serial interface UART has the following two 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 is transmitted and received after the start bit.
The on-chip dedicated UART baud rate generator enables communications using a wide range of selectable baud
rates.
For details, see 13.4.2 Asynchronous serial interface (UART) mode.
Figure 13-1 shows the serial interface UART block diagram.
Figure 13-1. Serial Interface UART Block Diagram
Internal bus
Internal bus
Receive buffer
register (RXB)
Receive shift
register (RXS)
Direction controller
Direction controller
Transmit controller
Baud rate generator
Transmit shift
register (TXS)
Receive controller
3
3
4
Asynchronous serial interface
status register (ASIS)
Asynchronous serial interface mode register (ASIM)
Baud rate generator control register (BRGC)
RxD/P53
TxD/P54
INTSER
INTSR
TXE
INTST
TXE RXE PS1 PS0 CL
SL ISRM
TPS2 TPS1 TPS0 MDL3 MDL2 MDL1 MDL0
FE
PE
OVE
f
X
/2
f
X
/2
2
f
X
/2
3
f
X
/2
4
f
X
/2
5
f
X
/2
6
f
X
/2
7
f
X
/2
8
Selector
f
SCK
Содержание mPD780852 Series
Страница 2: ...2 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 8: ...8 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 12: ...12 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 26: ...26 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 46: ...46 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 74: ...74 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 90: ...90 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 100: ...100 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 136: ...136 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 142: ...142 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 186: ...186 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 222: ...222 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 230: ...230 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 240: ...240 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 262: ...262 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 296: ...296 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 304: ...304 Preliminary User s Manual U14581EJ3V0UM00 MEMO...
Страница 314: ...314 Preliminary User s Manual U14581EJ3V0UM00 MEMO...