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CHAPTER 13 SERIAL INTERFACE (UART0)
Preliminary User’s Manual U16035EJ1V0UM
Figure 13-1. Block Diagram of Serial Interface (UART0)
Note
For the configuration of the baud rate generator, refer to
Figure 13-2
.
Figure 13-2. Block Diagram of Baud Rate Generator
Remark
TXE0: Bit 7 of asynchronous serial interface mode register 0 (ASIM0)
RXE0: Bit 6 of asynchronous serial interface mode register 0 (ASIM0)
Internal bus
Receive
buffer
register 0
(RXB0)
RxD0/P23
TxD0/P24
PE0 FE0 OVE0
Asynchronous serial
interface status
register 0 (ASIS0)
INTSER0
INTST0
Baud rate
generator
Note
ASCK0/P25
f
X
/2 to f
X
/2
7
TXE0 RXE0 PS01 PS00 CL0
SL0 ISRM0 IRDAM0
Asynchronous serial interface
mode register 0 (ASIM0)
INTSR0
Receive
controller
(parity
check)
Transmit
shift
register 0
(TXS0)
Transmit
controller
(parity
addition)
Receive
shift
register 0
(RX0)
TPS01
TPS02
5-bit counter
Start bit
sampling clock
TPS00
ASCK0/P25
f
X
/2 to f
X
/2
7
Selector
Internal bus
3
4
MDL03
Baud rate generator
control register 0 (BRGC0)
MDL02 MDL01 MDL00
Decoder
Transmit clock
TXE0
5-bit counter
Receive clock
RXE0
Start bit detection
1/2
Match
Match
1/2