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138
•
Bit 5—DTC Interrupt Select (DISEL): This bit designates whether to prohibit or allow
interrupt requests to the CPU after one-time DTC transfers.
Bit 5 (DISEL)
Description
0
Prohibit interrupts to the CPU after DTC data transfer completion if the
transfer counter is not 0 (DTC clears the interrupt source flag of the
activating source to 0)
1
Allow interrupts to the CPU after DTC data transfer completion (DTC
clears the DTER bit for the interrupt of the activating source to 0)
•
Bit 4—DTC NMI Mode (NMIM): This bit designates whether to terminate transfers when an
NMI is input during DTC transfers.
Bit 4 (NMIM)
Description
0
Terminate DTC transfer upon an NMI
1
Continue DTC transfer until end of transfer being executed
•
Bits 3–0—Reserved: They have no effect on DTC operation.
8.2.2
DTC Source Address Register (DTSAR)
The DTC source address register (DTSAR) is a 32-bit register that specifies the DTC transfer
source address. An even address indicates that the transfer size is word; a multiple-of-four address
means it is longword. The contents of this register is located in memory.
Bit:
31
30
29
28
27
…
4
3
2
1
0
…
Initial value:
*
*
*
*
*
…
*
*
*
*
*
R/W:
—
—
—
—
—
…
—
—
—
—
—
Note:
*
Initial value is undefined.
8.2.3
DTC Destination Address Register (DTDAR)
The DTC destination address register (DTDAR) is a 32-bit register that specifies the DTC transfer
destination address. An even address indicates that the transfer size is word; a multiple-of-four
address means it is longword. The contents of this register are located in memory.
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