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Ver.0.10
SERIAL I/O
12.7 Receive Operation in UART Mode
12.7 Receive Operation in UART Mode
12.7.1 Initial Settings for UART Reception
To receive data in UART mode, initialize the serial I/O following the procedure described below.
(1) Setting SIO Transmit/Receive Mode Register
• Set the register to UART mode
• Set parity (when enabled, select odd/even)
• Set stop bit length
• Set character length
Note : During UART mode, settings of the internal/external clock select bit have no effect (only
the internal clock is useful).
(2) Setting SIO Transmit Control Register
• Select the clock divider's divide-by ratio.
(3) Setting SIO Baud Rate Register
Set a baud rate generator value. (Refer to Section 12.6.1, "Setting the UART Baud Rate.")
(4) Setting SIO interrupt related registers
• Cause of Receive Interrupt Select Register
Select the cause of receive interrupt (receive finished/receive error)
• Interrupt Mask Register
Enable/disable receive interrupts
(5) Setting the Interrupt Controller
When you use interrupts during reception, set its priority level.
(6) Setting DMAC
When you issue DMA transfer requests to the internal DMAC when reception is completed, set
the DMAC. (Refer to Chapter 9, "DMAC.")
(7) Selecting pin functions
Because the serial I/O related pins serve dual purposes (shared with input/output ports), set pin
functions. (Refer to Chapter 8, "Input/Output Ports and Pin Functions.")
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 ...