CHAPTER 16 DATA TRANSFER CONTROLLER (DTC)
Page 532 of 920
16.4.3
Repeat Mode
One to 255 bytes of data are transferred by one activation. Either of the transfer source or destination should be
specified as the repeat area. The number of transfers can be 1 to 255 times. On completion of the specified
number of transfers, the DTCCTj (i = 0 to 23) register and the address specified for the repeat area are initialized
to continue transfers. When the data transfer causing the DTCCTj register value to change to 0 is performed
while the RPTINT bit in the DTCCRj register is 1 (interrupt generation enabled), the DTC generates an interrupt
request corresponding to the activation source to the interrupt controller during DTC operation, and sets the
corresponding bit among bits DTCENi0 to DTCENi7 to 0 (activation disabled). When the RPTINT bit in the
DTCCRj register is 0 (interrupt generation disabled), no interrupt request is generated even if the data transfer
causing the DTCCTj register value to change to 0 is performed. Also, bits DTCENi0 to DTCENi7 are not set to 0.
Table 16 - 8 lists Register Functions in Repeat Mode. Figure 16 - 16 shows Data Transfers in Repeat Mode.
Remark
j = 0 to 23
Table 16 - 8 Register Functions in Repeat Mode
Register Name
Symbol
Function
DTC block size register j
DTBLSj
Size of the data block to be transferred by one activation
DTC transfer count register j
DTCCTj
Number of data transfers
DTC transfer count reload register j
DTRLDj
This register value is reloaded to the DTCCT register
(the number of transfers is initialized).
DTC source address register j
DTSARj
Data transfer source address
DTC destination address register j
DTDARj
Data transfer destination address
Summary of Contents for RL78/G1H
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