Datasheet

149
Register
information
start address
Memory space Memory space Memory space
Register
information


Normal mode Repeat mode

Block transfer mode

DTMR
DTCRA
DTSAR
DTDAR
DTMR
DTCRA
DTSAR
DTDAR
DTIAR
DTMR
DTCRA
DTSAR
DTDAR
DTCRB
Figure 8.5 DTC Register Information Placement in Memory Space
8.3.5 Normal Mode
Performs the transfer of one byte, one word, or one longword for each activation. The total
transfer count is 1 to 65536. An interrupt request is generated to the CPU when the transfer with
DTCRA = 1 ends. Transfers of a number of bytes specified by the SCI are possible.
Table 8.3 shows the register functions for normal mode.
Table 8.3 Normal Mode Register Functions
Values Written Back upon a
Transfer Information Write
Register Function
When DTCRA
is other than 1 When DTCRA is 1
DTMR Operation mode
control
DTMR DTMR
DTCRA Transfer count DTCRA – 1 DTCRA – 1 (= H'0000)
DTSAR Transfer source
address
Increment/decrement/
fixed
Increment/decrement/
fixed
DTDAR Transfer destination
address
Increment/decrement/
fixed
Increment/decrement/
fixed
8.3.6 Repeat Mode
Performs the transfer of one byte, one word, or one longword for each activation. Either the
transfer source or transfer destination is designated as the repeat area.