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11.4.7 50% Duty Mode
11.4.7.1 Outline
The following functions are available in the 50% duty mode.
・
Communication pins:
For transmission UTxTXD50A and UTxTXD50B
For reception UTxRXD50
・
1-pin transmission mode
・
2-pin transmission mode
・
Selection of the start bit pin
・
Detection control of data "0" in the reception period
・
The loop-back test function
Note:
In 50% duty mode, do not perform the full-duplex transmission except when the loop-back test is en-
abled.
11.4.7.2 Control
When "1" is set to
UARTxHCCR
<HCCR>, the 50% duty control circuit is enabled, and the UART en-
ters the 50% duty mode. Duty conversion is performed on transmission/reception signals in the 50% duty
control circuit.
Port pin functions can select whether duty conversion is performed on the signal.
Figure 11-1 shows the circuit configuration.
Note:
Do not modify the UARTxHCCR register during the communication.
11.4.7.3 Operational Description
(1)
Transmission
(a)
1-pin transmission mode
This mode transmits the same data through UTxTXD50A and UTxTXD50B.
0
1
1
0
1
0
1
1
0
1
1
0
0
0
0
50% duty
Start
bit
Stop
bit
Parity
bit
Data bit
50% duty
50% duty
0
0
0
0
50% duty
UTxTXD
UTxTXD50A
UTxTXD50B
Figure 11-3 Example of waveforms in 1-pin transmission mode
TMPM3V6/M3V4
Page 207
2019-02-06
Summary of Contents for TMPM3V4
Page 1: ...32 Bit RISC Microcontroller TX03 Series TMPM3V6 M3V4 ...
Page 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
Page 7: ...Revision History Date Revision Comment 2019 02 06 1 First Release ...
Page 8: ......
Page 22: ...xiv ...
Page 52: ...TMPM3V6 M3V4 3 Processor Core 3 6 Exclusive access Page 30 2019 02 06 ...
Page 148: ...TMPM3V6 M3V4 7 Exceptions 7 6 Exception Interrupt Related Registers Page 126 2019 02 06 ...
Page 178: ...TMPM3V6 M3V4 9 Input Output port 9 2 Block Diagrams of Ports Page 156 2019 02 06 ...
Page 354: ...TMPM3V6 M3V4 14 Synchronous Serial Port SSP 14 6 Frame Format Page 332 2019 02 06 ...
Page 419: ...TMPM3V6 M3V4 Page 397 2019 02 06 ...
Page 462: ...TMPM3V6 M3V4 21 Watchdog Timer WDT 21 5 Control register Page 440 2019 02 06 ...
Page 544: ......