R0K572011S000BE Renesas Electronics America, R0K572011S000BE Datasheet - Page 356

• Manufacturer Part Number: R0K572011S000BE
• Description: KIT STARTER FOR SH7201
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572011S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7201
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Section 11 Direct Memory Access Controller (DMAC)
Page 328 of 1190
Bit
16
Bit Name
DREQ
Initial
Value
0
R/W
R/W
Description
(b) When a source other than the software trigger is
•
•
Note:
selected (DCTG = "000000") by the DMA request
source selection bits (DCTG) and a level sense
has been selected
Condition for setting to "1"
This bit is set to "1" when the DMA request input
level matches that specified in the input sense
selection bits (STRG), i.e. when a DMA request
exists.
Condition for clearing to "0"
This bit is cleared to "0" when the level specified by
the input sense selection bits (STRG) and the level
on the DMA request input do not match, i.e. when
there is no DMA request.
The DMA request is not retained if it disappears
before being accepted; that is, the DMA request bit
(DREQ) is cleared to "0". To use the DREQ bit with
a level sense, continue the DMA request level until
the request has been accepted.
When a requesting source other than the
software trigger is selected, do not write "1" to
the DMA request bit (DREQ). If "1" is written to
this bit, operation is not guaranteed.
R01UH0026EJ0300 Rev. 3.00
SH7201 Group
Sep 24, 2010