R01UH0823EJ0100 Rev.1.00 Page 1623 of 1823
Jul 31, 2019
RX23W Group 45. 12-Bit D/A Converter (R12DAA)
45.2.4 D/A A/D Synchronous Start Control Register (DAADSCR)
As a measure against interference between D/A and A/D conversion, the DAADSCR register selects whether or not the
timing for starting 12-bit D/A conversion is synchronized with the 12-bit A/D converter synchronous D/A conversion
enable signal from the 12-bit A/D converter.
This register should be set while the 12-bit A/D converter is halted (while the ADCSR.ADST bit is 0 after selecting
software trigger as the 12-bit A/D converter trigger).
DAADST Bit (D/A A/D Synchronous Conversion)
Setting the DAADST bit to 0 allows the DADRm register value (m = 0, 1) to be converted into analog data at any time.
Setting the DAADST bit to 1 allows synchronous D/A conversion with the 12-bit A/D converter synchronous D/A
conversion enable signal from the 12-bit A/D converter. Therefore, even if the DADRm register value is modified, D/A
conversion does not start until the 12-bit A/D converter completes A/D conversion.
Set this bit while the ADCSR.ADST bit is set to 0. At this time, the software trigger should be selected for the 12-bit A/D
converter trigger to securely stop the 12-bit A/D converter.
The event link function cannot be used when the DAADST bit is set to 1. Stop the event link function by setting the
ELSR16 register of the ELC. The setting of the DAADST bit is common to channels 0 and 1 of the 12-bit D/A converter.
Address(es): DA.DAADSCR 0008 8046h
b7 b6 b5 b4 b3 b2 b1 b0
DAADS
T
———————
Value after reset:
00000000
Bit Symbol Bit Name Description R/W
b6 to b0 — Reserved These bits are read as 0. The write value should be 0. R/W
b7 DAADST D/A A/D Synchronous
Conversion
0: 12-bit D/A converter operation does not synchronize with 12-bit A/D
converter operation. (measure against interference between D/A
and A/D conversion is disabled)
1: 12-bit D/A converter operation synchronizes with 12-bit A/D
converter operation. (measure against interference between D/A
and A/D conversion is enabled)
R/W
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