Piusivlreg (0X0B00 0126) - NEC VR4181 mPD30181 User Manual

This register sets and indicates the interrupt request generation of the PIU.
When the PENCHGINTR bit is set to1, the PENSTC bit of the PIUCNTREG register indicates the touch panel
contact status (touch or release) when a contact status changes. The PENSTC bit's status remains until the
PENCHGINTR bit is cleared to 0. Also, when the PENCHGINTR bit is cleared to 0, the PENSTC bit indicates the
touch panel contact status. However, the PENSTC bit does not change while the PENCHGINTR bit is set to 1, even
if the touch panel contact status changes between release and touch.
Caution In the Hibernate mode, the V
has been entered while the touch panel is touched, the contact status may be mistakenly
recognized as having changed, when the V
If a touch panel status change interrupt request occurs immediately after the V
the Hibernate mode, the PENCHGINTR bit may be set to 1 due to a miss-recognition such as above.
Similarly, other bits of the PIUINTREG register may be set to 1 on returning from the Hibernate
mode. Therefore, set each bit of the PIUINTREG register to 1 to clear an interrupt request
immediately after a restore from the Hibernate mode.

14.3.3 PIUSIVLREG (0x0B00 0126)

Bit 15
Name Reserved
R/W R
RTCRST 0
Other resets 0
Bit 7
Name SCAN
INTVAL7
R/W R/W
RTCRST 1
Other resets 1
Bit Name
15 to 11 Reserved
10 to 0 SCANINTVAL(10:0)
This register sets the scan interval (sampling period) for coordinate data sampling.
The sampling interval for one set of coordinate data is the value set via SCANINTVAL(10:0) multiplied by 30 µ s.
Accordingly, the logical range of sampling intervals that can be set in 30 µ s units is from 0 µ s to about 60 ms.
Actually, if the sampling interval setting is shorter than the time required for obtaining a set of coordinate data or
ADPScan data, a data lost interrupt request will occur. If data lost interrupt requests occur frequently, set a longer
interval time.
CHAPTER 14 TOUCH PANEL INTERFACE UNIT (PIU)
4181 retains the touch panel status. Therefore, if the Hibernate mode
R
14 13
Reserved Reserved Reserved
R R
0 0
0 0
6 5
SCAN SCAN
INTVAL6 INTVAL5 INTVAL4
R/W R/W
0 1
0 1
0 is returned when read
Coordinate data scan sampling interval setting
Interval = SCANINTVAL(10:0) x 30 µ s
User's Manual U14272EJ3V0UM
4181 returns to Fullspeed mode.
R
12 11
Reserved SCAN
INTVAL10
R R
0 0
0 0
4 3
SCAN SCAN SCAN
INTVAL3 INTVAL2
R/W R/W
0 0
0 0
Function
4181 returns from
R
10 9
SCAN SCAN
INTVAL9 INTVAL8
R/W R/W R/W
0 0
0 0
2 1
SCAN SCAN
INTVAL1 INTVAL0
R/W R/W R/W
1 1
1 1
8
0
0
0
1
1
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