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Bit 15—Data Transfer Size (DTSZ): Selects the size of data to be transferred at one time.
Bit 15
DTSZ
Description
0
Byte-size transfer
1
Word-size transfer
Bit 14—Source Address Increment/Decrement (SAID)
Bit 13—Source Address Increment/Decrement Enable (SAIDE): These bits specify whether
source address register MARA is to be incremented, decremented, or left unchanged, when data
transfer is performed.
Bit 14
Bit 13
SAID
SAIDE
0
0
1
1
0
1
Bit 12—Block Direction (BLKDIR)
Bit 11—Block Enable (BLKE): These bits specify whether normal mode or block transfer mode
is to be used. If block transfer mode is specified, the BLKDIR bit specifies whether the source side
or the destination side is to be the block area.
Bit 12
Bit 11
BLKDIR
BLKE
0
0
1
1
0
1
For operation in normal mode and block transfer mode, see section 8.5, Operation.
228
Description
MARA is fixed
MARA is incremented after a data transfer
•
When DTSZ = 0, MARA is incremented by 1 after a transfer
•
When DTSZ = 1, MARA is incremented by 2 after a transfer
MARA is fixed
MARA is decremented after a data transfer
•
When DTSZ = 0, MARA is decremented by 1 after a transfer
•
When DTSZ = 1, MARA is decremented by 2 after a transfer
Description
Transfer in normal mode
Transfer in block transfer mode, destination side is block area
Transfer in normal mode
Transfer in block transfer mode, source side is block area
(Initial value)
(Initial value)
(Initial value)
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