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VR4102 Datasheet(PDF) 511 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) 511 Page - NEC

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CHAPTER 26 FIR (FAST IrDA INTERFACE UNIT)
511
26.2.11 MIRCR (0x0C00 0060)
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
STA_LEN2
STA_LEN1
STA_LEN0
M_WIDTH4
M_WIDTH3
M_WIDTH2
M_WIDTH1
M_WIDTH0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
010
01
00
1
Other resets
0
1
0
0
1
0
0
1
Bit
Name
Function
D15 to D8
Reserved
Write 0 when writing. 0 is returned after a read.
D7 to D5
STA_LEN2 to
STA_LEN0
These bits are used to specify the number of STA (start flag) added to MIR’s transmit
frame.
STA_LEN2 to 0
Number of STA
001
010 (default)
011
100
111
1
2
4
16
32
Others
2 (reserved)
D4 to D0
M_WIDTH4 to
M_WIDTH0
These bits are used to specify the MIR pulse modulation width.
The MIR’s output pulse is modulated to a pulse consisting of the number of reference
clocks (48 MHz) specified by these bits.
F_WIDTH4 to 0
Single pulse
00000
00001
:
01001 (default)
:
10100
:
11111
1 clock
2 clocks
:
10 clocks
:
21 clocks
:
32 clocks
[Function]
Controls the MIR operation.
The nominal pulse width of MIR is 1/4. Therefore, be sure to set as follows:
MIR full mode (1.152 MHz) = 01001 (rate 10/42)
MIR half mode (0.576 MHz) = 10100 (rate 21/83)
[Caution]
During transmission/reception, the contents of this register must not be changed.



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