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VR4102 Datasheet(PDF) 513 Page - NEC

Part # VR4102
Description  64/32-bit Microprocessor
PDF  701 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

VR4102 Datasheet(HTML) 513 Page - NEC

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CHAPTER 26 FIR (FAST IrDA INTERFACE UNIT)
513
26.2.13 DMAER (0x0C00 0064)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
R/W
RRR
RR
RR
R
RTCRST
000
00
00
0
Other resets
0
0
0
0
0
0
0
0
Bit
D7D6D5
D4D3
D2D1
D0
Name
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
DMA_BUSY
DMA_EN
R/W
RRR
RR
RR
R/W
RTCRST
000
00
00
0
Other resets
0
0
0
0
0
0
0
0
Bit
Name
Function
D15 to D2
Reserved
Write 0 when writing. 0 is returned after a read.
D1
DMA_BUSY
DMA busy status
1: Busy
0: Not Busy
D0
DMA_EN
This bit is used as a DMA operation enable trigger.
1: Enable
0: Disable
Note that the DMA is not stopped by clearing this bit (to 0).
[Function]
The DMA_BUSY bit is set automatically by setting the DMA_EN bit to 1.
The DMA_BUSY bit is cleared when bit 0 of the FSR register is set or when all frame transmit data is written.



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