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VR4102 Datasheet(PDF) 454 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) 454 Page - NEC

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CHAPTER 23 LED (LED CONTROL UNIT)
454
23.2.1 LEDHTSREG (0x0B00 0240)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
R/W
R
RR
RRR
R
R
RTCRST
0
0
0
0
0
0
0
0
Other resets
0
0
0
0
0
0
0
0
Bit
D7
D6D5
D4D3D2
D1
D0
Name
Reserved
Reserved
Reserved
HTS[4]
HTS[3]
HTS[2]
HTS[1]
HTS[0]
R/W
R
R
R
R/W
R/W
R/W
R/W
R/W
RTCRST
0
0
0
1
0
0
0
0
Other resets
0
0
0
Note
Note
Note
Note
Note
Bit
Name
Function
D[15..5]
Reserved
Write 0 when writing. 0 is returned after a read.
D[4..0]
HTS[4..0]
LED ON time
00000 : Prohibit
00001 : 0.0625 seconds
00010 : 0.125 seconds
:
00100 : 0.25 seconds
:
01000 : 0.5 seconds
:
10000 : 1 second
:
11111 : 1.9375 seconds
Note Previous value is retained
This register is used to set the LED’s ON time (high-level width of LEDOUT#).
The ON time ranges from 0.0625 to 1.9375 seconds and can be set in 0.0625-second units. The initial value is 1
second.
This register cannot be changed once the LEDENABLE bit of LEDCNTREG has been set as “enable”. Operation
is not guaranteed if a change is made after that point.



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