12
12-53
Ver.0.10
SERIAL I/O
12.6 Transmit Operation in UART Mode
Figure 12.6.5 Example of UART Transmission (Transmitted Only Once, with Transmit Interrupt Used)
Note 1 : Change of the Interrupt Controller "SIO Transmit Interrupt Control Register" interrupt request bit
Note 2 : When transmit-finished interrupt is enabled (DMA transfer can also be requested at the same
timing)
Note 3 : The Interrupt Controller IVECT register is read or "SIO Transmit Interrupt Control Register"
interrupt request bit cleared
Note 4 : Transmit interrupt request is generated when transmission is enabled.
Note 5 : Even after transmit data is written to the transmit buffer, a transmit interrupt request is generated
when the data is transferred from the transmit buffer to the transmit shift register and the transmit
buffer is thereby emptied.
12.6.9 Typical UART Transmit Operation
The following shows a typical transmit operation in CSIO mode.
: Processing by software
: Interrupt generation
<UART on receive side>
TXD
RXD
Set
Write to
transmit
buffer register
Transmit buffer
empty bit
Transmit enable bit
Cleared
Transmit status bit
ST
D7
D6
D0 PAR ST
ST
TXD
SIO transmit interrupt
(Note 1)
Transmit
interrupt
(Note 4)
Interrupt request accepted
Transferred from transmit
buffer to transmit shift register
(transmission starts)
(Note 2)
(Note 3)
<UART on transmit side>
<UART on transmit side>
Transmit
interrupt
(Note 5)
Cleared
Содержание M32170F3VFP
Страница 19: ...CHAPTER 1 CHAPTER 1 OVERVIEW 1 1 Outline of the 32170 1 2 Block Diagram 1 3 Pin Function 1 4 Pin Layout ...
Страница 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Страница 56: ...2 2 14 Ver 0 10 This is a blank page ...
Страница 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Страница 192: ...6 6 58 Ver 0 10 INTERNAL MEMORY 6 9 Precautions to Be Taken When Rewriting Flash Memory This is a blank page ...
Страница 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Страница 498: ...10 10 228 Ver 0 10 MULTIJUNCTION TIMERS 10 9 TOM Output related 16 bit Timer This is a blank page ...
Страница 550: ...11 11 52 Ver 0 10 A D CONVERTERS 11 4 Precautions on Using A D Converters This is a blank page ...
Страница 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Страница 710: ...14 14 16 Ver 0 10 REAL TIME DEBUGGER RTD 14 4 Typical Connection with the Host This is a blank page ...
Страница 746: ...16 16 20 Ver 0 10 WAIT CONTROLLER 16 3 Typical Operation of the Wait Controller This is a blank page ...
Страница 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Страница 757: ...CHAPTER 18 CHAPTER 18 OSCILLATION CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit ...
Страница 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Страница 798: ...19 19 36 Ver 0 10 JTAG 19 6 Precautions about Board Design when Connecting JTAG This is a blank page ...
Страница 830: ...21 21 24 Ver 0 10 PRELIMINARY PRELIMINARY This is a blank page ELECTRICAL CHARACTERISTICS 21 5 AC Characteristics ...
Страница 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Страница 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Страница 837: ...Appendix 2 1 32170 Instruction Processing Time APPENDIX 2 APPENDIX 2 INSTRUCTION PROCESSING TIME ...
Страница 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...