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TMP89FS60 Datasheet(PDF) 246 Page - Toshiba Semiconductor

Part # TMP89FS60
Description  8 Bit Microcontroller
PDF  410 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP89FS60 Datasheet(HTML) 246 Page - Toshiba Semiconductor

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Page 232
16. Asynchronous Serial Interface (UART)
16.13 Receiving Process
TMP89FS60
RA001
16.13Receiving Process
Figure 16-18 shows an example of the receiving process. Details of flag judgments in the processing are shown in
Table 16-10 and Table 16-11.
If any framing error or parity error is detected, the received data has erroneous value(s). Execute the error han-
dling, for example, by discarding the received data read from RD0BUF and receiving the data again.
If any overrun error is detected, the receiving of one or more pieces of data is unfinished. It is impossible to deter-
mine the number of pieces of data that could not be received. Execute the error handling, for example, by receiving
data again from the beginning of the transfer. Basically, an overrun error occurs when the internal software process-
ing cannot follow the data transfer speed. It is recommended to slow the transfer baud rate or modify the software to
execute flow control.
Figure 16-18 Example of Receiving Process
Note 1: If multiple interrupts are used in the INTRXD0 interrupt subroutine, the interrupt should be enabled after reading
UART0SR and RD0BUF.
Receiving process
END
When no receive interrupt is used
When a receive interrupt is used
Read UART0SR
Read RD0BUF
Error handling
Error handling
Error handling
Error handling
Data processing
(Received data is valid)
UART0SR<RBFL>
1
1
1
0
0
0
1
0
UART0SR<PERR>
Parity error
Framing error
Overrun error
Parity error
Framing error
Overrun error
UART0SR<FERR>
UART0SR<OERR>
INTRXD0 interrupt
subroutine
RETI
Read UART0SR
Read RD0BUF
Data processing
(Received data is valid)
1
1
0
0
1
0
UART0SR<PERR>
UART0SR<FERR>
UART0SR<OERR>



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