
CHAPTER 9
PIU (TOUCH PANEL INTERFACE UNIT)
User’s Manual U14579EJ2V0UM
138
9.3.5
PIUCMDREG (base address + 0x0AA)
Bit
1514
131211
10
9
8
Name
RFU
STABLEON
TPYEN1
TPYEN0
TPXEN1
TPXEN0
R/W
R
R/W
After reset
0
000
Bit
7
6
543
210
Name
TPYD1
TPYD0
TPXD1
TPXD0
ADCMD3
ADCMD2
ADCMD1
ADCMD0
R/W
After reset
0
001
111
Bit
Name
Function
15:13
RFU
Reserved. Write 0 to these bits. 0 is returned after a read.
12
STABLEON
Touch panel applied voltage stabilization time set during command scan
(STABLE(5:0) area of PIUSTBLREG register) enable
1: Retain panel voltage stabilization time
0: Ignore panel voltage stabilization time (voltage stabilization standby time = 0)
11:10
TPYEN(1:0)
TPY port output enable switching during command scan
11: TPY1 output, TPY0 output
10: TPY1 output, TPY0 OFF (Hi-Z)
01: TPY1 OFF (Hi-Z), TPY0 output
00: TPY1 OFF (Hi-Z), TPY0 OFF (Hi-Z)
9:8
TPXEN(1:0)
TPX port output enable switching during command scan
11: TPX1 output, TPX0 output
10: TPX1 output, TPX0 OFF (Hi-Z)
01: TPX1 OFF (Hi-Z), TPX0 output
00: TPX1 OFF (Hi-Z), TPX0 OFF (Hi-Z)
7:6
TPYD(1:0)
TPY output level during command scan
11: TPY1 = High, TPY0 = High
10: TPY1 = High, TPY0 = Low
01: TPY1 = Low, TPY0 = High
00: TPY1 = Low, TPY0 = Low
5:4
TPXD(1:0)
TPX output level during command scan
11: TPX1 = High, TPX0 = High
10: TPX1 = High, TPX0 = Low
01: TPX1 = Low, TPX0 = High
00: TPX1 = Low, TPX0 = Low
3:0
ADCMD(3:0)
A/D converter input port selection for command scan
1111: A/D converter standby mode request
1110: Reserved
:
0100: Reserved
0011: AUDIOIN port
0010: ADIN port
0001: ADY port
0000: ADX port
This register switches input/output and sets output level for each port during a command scanning operation.
Setting of the TPYD bit is invalid when the port output is set to OFF by the TPYEN bit.
Setting of the TPXD bit is invalid when the port output is set to OFF by the TPXEN bit.