229
Bits 10 to 7—Reserved: Can be read or written to.
Bit 6—Destination Address Increment/Decrement (DAID)
Bit 5—Destination Address Increment/Decrement Enable (DAIDE): These bits specify
whether destination address register MARB is to be incremented, decremented, or left unchanged,
when data transfer is performed.
Bit 6
Bit 5
DAID
DAIDE
Description
0
0
MARB is fixed
(Initial value)
1
MARB is incremented after a data transfer
•
When DTSZ = 0, MARB is incremented by 1 after a transfer
•
When DTSZ = 1, MARB is incremented by 2 after a transfer
1
0
MARB is fixed
1
MARB is decremented after a data transfer
•
When DTSZ = 0, MARB is decremented by 1 after a transfer
•
When DTSZ = 1, MARB is decremented by 2 after a transfer
Bit 4—Reserved: Can be read or written to.
Bits 3 to 0—Data Transfer Factor (DTF3 to DTF0): These bits select the data transfer factor
(activation source). The factors that can be specified differ between normal mode and block
transfer mode.
•
Normal Mode
Bit 3
Bit 2
Bit 1
Bit 0
DTF3
DTF2
DTF1
DTF0
Description
0
0
0
0
—
(Initial value)
1
—
1
0
Activated by
DREQ
pin falling edge input
1
Activated by
DREQ
pin low-level input
1
0
*
—
1
0
Auto-request (cycle steal)
1
Auto-request (burst)
1
*
*
*
—
*
: Don't care