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VR4102 Datasheet(PDF) 391 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) 391 Page - NEC

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CHAPTER 19 PIU (TOUCH PANEL INTERFACE UNIT)
391
19.3.3 PIUSIVLREG (0x0B00 0126)
Bit
D15
D14
D13
D12
D11
D10
D9
D8
Name
Reserved
Reserved
Reserved
Reserved
Reserved
SCANINT
VAL[10]
SCANINT
VAL[9]
SCANINT
VAL[8]
R/W
R
R
R
R
R
R/W
R/W
R/W
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
SCANINT
VAL[7]
SCANINT
VAL[6]
SCANINT
VAL[5]
SCANINT
VAL[4]
SCANINT
VAL[3]
SCANINT
VAL[2]
SCANINT
VAL[1]
SCANINT
VAL[0]
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
1
1
Other resets
0
0
0
0
0
1
1
1
Bit
Name
Function
D[15..11]
Reserved
Write 0 when writing. 0 is returned after a read.
D[10..0]
SCANINTVAL[10..0]
Coordinate data scan sampling interval setting
Interval = SCANINTVAL[10..0] x 30
Ps
This register sets the sampling interval for coordinate data sampling.
The sampling interval for one pair of coordinate data is the value set via SCANINTVAL[10..0] multiplied by 30
Ps.
Accordingly, the logical range of sampling intervals that can be set in 30-
Ps units is from 0 Ps to 60,810 Ps (about 60
ms). Actually, if the sampling interval setting is shorter than the time required for obtaining a pair of coordinate data
or ADPortScan data, a PIULostIntr interrupt will occur. If PIULostIntr interrupts occur frequently, set a longer interval
time.
Figure 19-5. Interval Times and States
Remarks S : Voltage stabilization standby time (STABLE(5:0) in PIUSTBLREG)
A : A/D converter’s conversion time (about 10
Ps)
T : Touch/release detection
DataScan
Interval
Interval
ADPortScan
DataScan
State
S A S A S A S A
A A A A
S A S A S A S A
S T
T
Interval time
Operation



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