Renesas RX600 Series, User Manual

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RX610 Group 13. Data Transfer Controller (DTC)
R01UH0032EJ0120 Rev.1.20 Page 353 of 1006
Feb 20, 2013
13.4.2 Transfer Data Write-Back Skip Function
When the SM[1:0] bits in MRA or the DM[1:0] bits in MRB are set to "address fixed", a part of transfer data is not
written back. This function is performed independently of the setting of short-address mode or full-address mode. Table
13.6 lists transfer data write-back skip conditions and applicable registers.
The CRA and CRB registers are always written back independently of the setting of short-address mode or full-address
mode. Furthermore, in full-address mode, write-back of the MRA and MRB registers are always skipped.
Table 13.6 Transfer Data Write-Back Skip Conditions and Applicable Registers
SM[1:0] Bits in MRA DM[1:0] Bits in MRB
SAR Register DAR Register b3 b2 b3 b2
0 0 0 0 Skip Skip
0 0 0 1
0 1 0 0
0 1 0 1
0 0 1 0 Skip Write-back
0 0 1 1
0 1 1 0
0 1 1 1
1 0 0 0 Write-back Skip
1 0 0 1
1 1 0 0
1 1 0 1
1 0 1 0 Write-back Write-back
1 0 1 1
1 1 1 0
1 1 1 1