12
12-24
Ver.0.10
SERIAL I/O
12.2 Serial I/O Related Registers
(1) RSTAT (receive status) bit (D1)
[Set condition]
This bit is set to 1 by a start of receive operation. When this bit = 1, it means that the serial
I/O is receiving data.
[Clear condition]
This bit is cleared to 0 upon completion of receive operation or by clearing the REN
(receive enable) bit.
(2) RFIN (receive completed) bit (D2)
[Set condition]
This bit is set to 1 when all data bits have been received in the Receive Shift Register and
whose content is transferred to the Receive Buffer Register.
[Clear condition]
This bit is cleared to 0 by reading the lower byte from the Receive Buffer Register or by
clearing the REN (receive enable) bit. However, if an overrun error occurs, this bit cannot
be cleared by reading the lower byte from the Receive Buffer Register. In this case, clear
the REN (receive enable) bit.
(3) REN (receive enable) bit (D3)
Receive is enabled by setting this bit to 1, and is disabled by clearing this bit to 0, at which time
the receive unit is initialized. Accordingly, the receive status flag, receive-completed flag bit,
overrun error flag, framing error flag, parity error flag, and error sum flag all are cleared. The
receive operation stops when the receive enable bit is cleared to 0 while receiving data.
(4) OVR (overrun error) bit (D4)
[Set condition]
This bit is set to 1 when all bits of the next receive data have been received in the Receive
Shift Register while the Receive Buffer Register still contains the previous receive data. In
this case, the receive data is not stored in the Receive Buffer Register. Although receive
operation is continued when the overrun error flag = 1, the receive data is not stored in the
Receive Buffer Register. To start reception normally, you need to clear this bit.
[Clear condition]
This bit is cleared to 0 by only clearing the REN (receive enable) bit.
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 ...