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TMP89FM42
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
Summary of Contents for TLCS-870/C1 Series
Page 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......