RX610 Group
13. Data Transfer Controller (DTC)
R01UH0032EJ0120 Rev.1.20
Page 337 of 1006
Feb 20, 2013
13.2.1
DTC Mode Register A (MRA)
Address (inaccessible directly from the CPU)
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
x
x
x
x
x
x
x
x
—
—
MD[1:0]
SZ[1:0]
SM[1:0]
[Legend] x: Undefined
Bit
Symbol
Bit
Symbol
R/W
b1, b0
Reserved
The read data is undefined. The write value should be 0.
b3, b2
SM[1:0]
SAR Transfer Source Address
Addressing Mode
b3 b2
0 0: SAR address is fixed
(Write-back to SAR is skipped)
0 1: SAR address is fixed
(Write-back to SAR is skipped)
1 0: SAR value is incremented after data transfer
(+1 when SZ[1:0] bits = 00b, +2 when SZ[1:0] bits =
01b, +4 when SZ[1:0] bits = 10b)
1 1: SAR value is decremented after data transfer
(-1 when SZ[1:0] bits = 00b, -2 when SZ[1:0] bits =
01b, -4 when SZ[1:0] bits = 10b)
b5, b4
SZ[1:0]
DTC Data Transfer Size
b5 b4
0 0: Byte transfer
0 1: Word transfer
1 0: Longword transfer
1 1: Setting prohibited
b7, b6
MD[1:0]
DTC Mode
b7 b6
0 0: Normal transfer mode
0 1: Repeat transfer mode
1 0: Block transfer mode
1 1: Setting prohibited
MRA is used to select the operating mode of the DTC.
MRA cannot be accessed directly from the CPU.
SM[1:0] Bits (SAR Transfer Source Address Addressing Mode)
These bits specify the SAR operation after data transfer.
SZ[1:0] Bits (DTC Data Transfer Size)
These bits specify the transfer data size.
MD[1:0] Bits (DTC Mode)
These bits specify the transfer mode of the DTC.
Summary of Contents for RX600 Series
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