SH7261 datasheet(349/1348 Pages) RENESAS

349 / 1348 page

Section 11 Direct Memory Access Controller (DMAC)

Rev. 2.00 Sep. 07, 2007 Page 317 of 1312

REJ09B0320-0200

11.3.6

DMA Reload Byte Count Register (DMRBCT)

DMRBCT is a register used to set the number for reloading to the DMA current byte count

To enable reloading, set the DMA byte count reload function enable bit (BRLOD) in the DMA

control register A (DMCNTAn) to 1. In this case, set both the DMA current byte count register

(DMCBTn) and DMA reload byte count address register (DMRBCTn).

Bit:

Initial value:

R/W:

9876543210

Bit:

Initial value:

R/W:

000000

—

R/W

—

———————

R/W

——————

RBC

Bit

Bit Name

Initial

Value

R/W

Description

31 to 26



All 0

Reserved

These bits are always read as 0. The write value

should always be 0.

25 to 0

RBC

Undefined R/W

Number of bytes to be DMA-transferred after reloading

Note:

Set this register so that DMA transfer is performed within the correctly aligned address

boundaries for the transfer sizes listed below.

• When the transfer size is set to 16 bits (SZSEL = "001"): (b0) = "0".

• When the transfer size is set to 32 bits (SZSEL = "010"): (b1, b0) = (0, 0).

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