HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 207
HD6433045
Manufacturer Part Number
HD6433045
Description
Hitachi Single-Chip Microcomputer
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6433045.pdf
(867 pages)
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8.2.4 Data Transfer Control Registers (DTCR)
A data transfer control register (DTCR) is an 8-bit readable/writable register that controls the
operation of one DMAC channel.
The DTCRs are initialized to H'00 by a reset and in standby mode.
Bit 7—Data Transfer Enable (DTE): Enables or disables data transfer on a channel. When the
DTE bit is set to 1, the channel waits for a transfer to be requested, and executes the transfer when
activated as specified by bits DTS2 to DTS0. When DTE is 0, the channel is disabled and does not
accept transfer requests. DTE is set to 1 by reading the register when DTE is 0, then writing 1.
Bit 7
DTE
0
1
If DTIE is set to 1, a CPU interrupt is requested when DTE is cleared to 0.
Bit
Initial value
Read/Write
Data transfer enable
Enables or disables
data transfer
Description
Data transfer is disabled. In I/O mode or idle mode, DTE is cleared to 0
when the specified number of transfers have been completed.
Data transfer is enabled
DTE
R/W
7
0
Data transfer size
Selects byte or
word size
Data transfer
increment/decrement
Selects whether to
increment or decrement
the memory address
register
DTSZ
R/W
6
0
DTID
R/W
5
0
Repeat enable
Selects repeat
mode
193
RPE
R/W
4
0
Data transfer interrupt enable
Enables or disables the CPU interrupt
at the end of the transfer
DTIE
R/W
3
0
DTS2
R/W
2
0
Data transfer select
These bits select the data
transfer activation source
DTS1
R/W
1
0
(Initial value)
DTS0
R/W
0
0
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