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VR4102 Datasheet(PDF) 455 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) 455 Page - NEC

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CHAPTER 23 LED (LED CONTROL UNIT)
455
23.2.2 LEDLTSREG (0x0B00 0242)
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
00
00
0
0
0
0
Other resets
00
00
0
0
0
0
Bit
D7
D6D5
D4D3D2
D1
D0
Name
Reserved
LTS[6]
LTS[5]
LTS[4]
LTS[3]
LTS[2]
LTS[1]
LTS[0]
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
00
10
0
0
0
0
Other resets
0
Note
Note
Note
Note
Note
Note
Note
Bit
Name
Function
D[15..7]
Reserved
Write 0 when writing. 0 is returned after a read.
D[6..0]
LTS[6..0]
LED OFF time
0000000 : Prohibit
0000001 : 0.0625 seconds
0000010 : 0.125 seconds
:
0000100 : 0.25 seconds
:
0001000 : 0.5 seconds
:
0010000 : 1 second
:
0100000 : 2 seconds
:
1000000 : 4 seconds
:
1111111 : 7.9375 seconds
Note Previous value is retained
This register is used to set the LED’s OFF time (low-level width of LEDOUT#).
The OFF time ranges from 0.0625 to 7.9375 seconds and can be set in 0.0625-second units. The initial value is
2 seconds.
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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