12
12-41
Ver.0.10
SERIAL I/O
12.4 Receive Operation in CSIO Mode
Figure 12.4.3 Example of CSIO Reception (When Received Normally)
Note 1 : Change of the Interrupt Controller "SIO Receive Interrupt Control Register" interrupt request bit
Note 2 : When receive-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 Receive Interrupt Control Register"
interrupt request bit cleared
12.4.6 Typical CSIO Receive Operation
The following shows a typical receive operation in CSIO mode.
SIO receive interrupt
(Note 1)
(When receive-finished
interrupt is selected)
Clock stopped
Automatically
cleared for each
receive operation
performed
Receive-finished bit
Read from receive buffer
(When receive error
interrupt is selected)
Receive-finished interrupt
(Note 2)
Interrupt request accepted
(Note 3)
No interrupt request
Internal clock selected
External clock selected
<CSIO on transmit side>
SCLKO
RXD
SCLKI
TXD
Receive clock
(SCLKI)
Set
Receive enable bit
Cleared
Receive status bit
<CSIO on receive side>
<CSIO on receive side>
Set by a write to
transmit buffer
D7
D6
D5
D4
D3
D2
D1
D0
RXD
: Processing by software
: Interrupt generation
Summary of Contents for M32170F3VFP
Page 42: ...1 1 24 Ver 0 10 OVERVIEW 1 4 Pin Layout This is a blank page ...
Page 56: ...2 2 14 Ver 0 10 This is a blank page ...
Page 88: ...3 3 32 Ver 0 10 ADDRESS SPACE 3 7 Notes on Address Space This is a blank page ...
Page 270: ...9 9 40 Ver 0 10 DMAC 9 4 Precautions about the DMAC This is a blank page ...
Page 614: ...12 12 64 Ver 0 10 This is a blank page SERIAL I O 12 9 Precautions on Using UART Mode ...
Page 756: ...17 17 10 Ver 0 10 RAM BACKUP MODE 17 4 Exiting RAM Backup Mode Wakeup This is a blank page ...
Page 762: ...18 18 6 Ver 0 10 OSCILLATION CIRCUIT 18 2 Clock Generator Circuit This is a blank page ...
Page 831: ...CHAPTER 22 CHAPTER 22 TYPICAL CHARACTERISTICS 22 1 A D Conversion Characteristics ...
Page 833: ...Appendix 1 1 Dimensional Outline Drawing APPENDIX 1 APPENDIX 1 MECHANICAL SPECIFICATIONS ...
Page 841: ...Appendix 3 1 Precautions about Noise APPENDIX 3 APPENDIX 3 PRECAUTIONS ABOUT NOISE ...