R0K572115S000BE Renesas Electronics America, R0K572115S000BE Datasheet - Page 338

• Manufacturer Part Number: R0K572115S000BE
• Description: KIT STARTER FOR SH7211
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: Microcontrollerr

Specifications of R0K572115S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7211
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Rev. 3.00 Mar. 04, 2009 Page 312 of 1168
REJ09B0344-0300
Bit
19
18
HIE
Bit Name
HE
Initial
Value
0
0
R/W
R/(W)* Half-End Flag
R/W
Descriptions
This bit is set to 1 when the transfer count reaches half
of the DMATCR value that was specified before
transfer starts.
If DMA transfer ends because of an NMI interrupt, a
DMA address error, or clearing of the DE bit or the
DME bit in DMAOR before the transfer count reaches
half of the initial DMATCR value, the HE bit is not set
to 1. If DMA transfer ends due to an NMI interrupt, a
DMA address error, or clearing of the DE bit or the
DME bit in DMAOR after the HE bit is set to 1, the bit
remains set to 1.
To clear the HE bit, write 0 to it after HE = 1 is read.
0: DMATCR > (DMATCR set before transfer starts)/2
[Clearing condition]
•
1: DMATCR ≤ (DMATCR set before transfer starts)/2
Half-End Interrupt Enable
Specifies whether to issue an interrupt request to the
CPU when the transfer count reaches half of the
DMATCR value that was specified before transfer
starts.
When the HIE bit is set to 1, the DMAC requests an
interrupt to the CPU when the HE bit becomes 1.
0: Disables an interrupt to be issued when DMATCR
1: Enables an interrupt to be issued when DMATCR
during DMA transfer or after DMA transfer is
terminated
= (DMATCR set before transfer starts)/2
= (DMATCR set before transfer starts)/2
Writing 0 after reading HE = 1.