R01UH0823EJ0100 Rev.1.00 Page 395 of 1823
Jul 31, 2019
RX23W Group 19. Data Transfer Controller (DTCa)
19.4.3 Normal Transfer Mode
This mode allows 1-byte, 1-word, or 1-longword data transfer on a single transfer request. The transfer count can be set
to 1 to 65536.
Transfer source addresses and transfer destination addresses can be set to increment, decrement, or fixed independently.
This mode enables an interrupt request to the CPU to be generated at the end of specified-count transfer.
Table 19.5 lists register functions in normal transfer mode, and Figure 19.5 shows the memory map of normal transfer
mode.
Note 1. Write-back operation is skipped when address is fixed.
Figure 19.5 Memory Map of Normal Transfer Mode
Table 19.5 Register Functions in Normal Transfer Mode
Register Description Value Written Back by Writing Transfer Information
SAR Transfer source address Increment/decrement/fixed*
1
DAR Transfer destination address Increment/decrement/fixed*
1
CRA Transfer counter A CRA – 1
CRB Transfer counter B Not updated
SAR
Transfer source data area
DAR
Transfer
Transfer destination data area
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
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