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TMP89FS60 Datasheet(PDF) 245 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) 245 Page - Toshiba Semiconductor

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Page 231
TMP89FS60
RA001
16.12.5 Transmit busy flag
If transmission is completed with no waiting data in TD0BUF (when UART0SR<TBFL>="0"),
UART0SR<TBSY> is cleared to "0". When transmission is restarted after data is written into TD0BUF,
UART0SR<TBSY> is set to "1". At this time, an INTTXD0 interrupt request is generated.
Figure 16-16 Transmit Busy Flag and Occurrence of Transmit Buffer Full
16.12.6Transmit Buffer Full
When TD0BUF has no data, or when data in TD0BUF is transferred to the transmit shift register and trans-
mission is started, UART0SR<TBFL> is cleared to "0". At this time, an INTTXD0 interrupt request is gener-
ated.
Writing data into TD0BUF sets UART0SR<TBFL> to "1".
Figure 16-17 Occurrence of Transmit Buffer Full
TXD0 pin input
INTTXD0 interrupt
request
UART0SR<TBFL>
Start Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Stop
Start Bit0
Bit1
Bit6
Bit7
Stop
Writing of TD0BUF
UART0SR<TBSY>
UART0CR1<TXE>
Data A
Data B
Writing of
data A
Writing of
data B
TXD0 pin input
INTTXD0 interrupt
request
UART0SR<TBFL>
Start Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Stop Start Bit0
Bit1
Bit2
Bit3
Bit6
Bit7
Stop
Writing of TD0BUF
UART0SR<TBSY>
UART0CR1<TXE>
Data A
Data B
Writing of
data A
Writing of
data B



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