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VR4102 Datasheet(PDF) 457 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) 457 Page - NEC

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CHAPTER 23 LED (LED CONTROL UNIT)
457
23.2.4 LEDASTCREG (0x0B00 024A)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
ASTC[15]
ASTC[14]
ASTC[13]
ASTC[12]
ASTC[11]
ASTC[10]
ASTC[9]
ASTC[8]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
0
0
0
0
0
1
0
0
Other resets
0
0
0
0
0
1
0
0
Bit
D7
D6D5
D4D3D2
D1
D0
Name
ASTC[7]
ASTC[6]
ASTC[5]
ASTC[4]
ASTC[3]
ASTC[2]
ASTC[1]
ASTC[0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
RTCRST
1
0
1
1
0
0
0
0
Other resets
1
0
1
1
0
0
0
0
Bit
Name
Function
D[15..0]
ASTC[15..0]
LED auto stop time count bit
This register is a 16-bit down counter that sets the number of ON/OFF times prior to automatic stopping of LED
activation. The set value is read during a read.
The pair of operations in which the LED is switched ON once and OFF once is counted as “1” by this counter.
The counter counts down from the set value and an LEDINT interrupt occurs when it reaches zero.
The initial setting is 1,200 times (ON/OFF pairs) in which each time includes one second of ON time and two
seconds of OFF time.
Caution
Setting a zero to this register is prohibited. The operation is not guaranteed if zero is set to this
register.



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