SH7261 datasheet(358/1348 Pages) RENESAS

358 / 1348 page

Section 11 Direct Memory Access Controller (DMAC)

Rev. 2.00 Sep. 07, 2007 Page 326 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

23 to 18



All 0

Reserved

These bits are always read as 0. The write value

should always be 0.

17, 16

STRG[1:0]

R/W

Input Sense Mode Selection

These bits specify input sense modes for DMA request

signals input to the DMAC. The requesting source is

that selected from among the possible sources by the

DMA request source selection bits (DCTG).

Select rising edge sense by setting these bits to "00" if

the software trigger (DCTG

= "000000") and pins

DREQ0 to DREQ3 are selected as the source for DMA

requests. Select falling edge sense by setting the bits

to "10" when operation is with IIC3, SCIF, SSI, RCAN-

ET, MTU2, ADC, or ROM-DEC (DCTG

= "000101" to

"100101"). Table 11.4 shows the relationships

between DMA request sources and the possible input

sense modes.

00: Rising edge

01: High level

10: Falling edge

11: Low level

15 to 11



All 0

Reserved

These bits are always read as 0. The write value

should always be 0.

BRLOD

R/W

DMA Byte Count Reload Function Enable

This bit specifies whether to reload the byte counter or

not when the DMA transfer end condition is detected.

When this bit is cleared to "0", no reload is executed.

When this bit is set to "1" and the DMA transfer end

condition is detected, the DMA current byte counter

DMA reload byte count register (DMRBCTn).

0: Byte count reload function disabled

1: Byte count reload function enabled

SH7261 Datasheet(PDF) 358 Page - Renesas Technology Corp

SH7261 Datasheet(HTML) 358 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL