R01UH0823EJ0100 Rev.1.00
Page 343 of 1823
Jul 31, 2019
RX23W Group
18. DMA Controller (DMACA)
18.2.4
DMA Block Transfer Count Register (DMCRB)
DMCRB specifies the number of block transfer operations and repeat transfer operations in block and repeat transfer
mode, respectively.
The number of transfer operations is one when the setting is 001h, 1023 when it is 3FFh, and 1024 when it is 000h.
In repeat transfer mode, the value is decremented by one when the final data of one repeat size is transferred.
In block transfer mode, the value is decremented by one when the final data of one block size is transferred.
In normal transfer mode, DMCRB is not used. The setting is invalid.
Address(es): DMAC0.DMCRB 0008 200Ch, DMAC1.DMCRB 0008 204Ch, DMAC2.DMCRB 0008 208Ch, DMAC3.DMCRB 0008 20CCh
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Description
Setting Range
R/W
b9 to b0
Specifies the number of block transfer operations
or repeat transfer operations.
001h to 3FFh (1 to 1023)
000h (1024)
R/W
b15 to b10
Reserved
These bits are read as 0. The write value should be 0.
R/W