12
12-63
Rev.1.0
SERIAL I/O
12.7 Receive Operation in UART Mode
Figure 12.7.4 Example of UART Reception (When Overrun Error Occurred)
Note 1 : Change of the Interrupt Controller "SIO Receive Interrupt Control Register" interrupt request bit
Note 2 : When receive-finished interrupt is enabled
Note 3 : When receive error interrupt is enabled
Note 4 : This is done by clearing the receive enable bit to 0.
Note 5 : The Interrupt Controller IVECT register is read or "SIO Receive Interrupt Control Register" interrupt
request bit cleared
First data reception
completed
Overrun error bit
Receive buffer not read
during this interval
Overrun error bit cleared
(Note 4)
Receive error interrupt
(Note 3)
<UART on transmit side>
RXD
TXD
Set
<UART on receive side>
<UART on receive side>
ST
D7
SP
ST
D7
SP
RXD
Set
SIO receive interrupt
(Note 1)
(When receive-finished
interrupt is selected)
(When receive error
interrupt is selected)
Receive-finished interrupt
(Note 2)
Interrupt request accepted (Note 5)
Interrupt request accepted (Note 5)
: Processing by software
: Interrupt generation
Next data reception
completed
(Note 5)
Receive enable bit
(SIO Receive
Control Register)
Receive-finished bit
Summary of Contents for 32172
Page 20: ... This is a blank page 16 ...
Page 21: ...1 1 Overview 1 2 Block Diagram 1 3 Pin Functions 1 4 Pin Layout CHAPTER 1 CHAPTER 1 OVERVIEW ...
Page 44: ...1 1 24 Rev 1 0 This is a blank page Overview 1 4 Pin Layout ...
Page 58: ...2 2 14 Rev 1 0 This is a blank page CPU 2 6 Data Formats ...
Page 122: ...4 4 26 Rev 1 0 This is a blank page EIT 4 13 Precautions on EIT ...
Page 200: ...7 7 6 Rev 1 0 This is a blank page RESET 7 4 Precautions to Be Taken Immediately after Reset ...
Page 298: ...9 9 58 Rev 1 0 This is a blank page DMAC 9 4 Precautions on Using DMAC ...
Page 776: ...19 19 10 Rev 1 0 RAM BACKUP MODE 19 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 782: ...20 20 6 Rev 1 0 OSCILLATION CIRCUIT 20 2 Clock Generator Circuit This is a blank page ...
Page 856: ...23 23 26 Rev 1 0 This is a blank page ELECTRICAL CHARACTERISTICS 23 6 AC Characteristics ...
Page 857: ...24 1 A D Conversion Characteristics CHAPTER 24 CHAPTER 24 STANDARD CHARACTERISTICS ...
Page 859: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 865: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...