Allwinner A20 - Page 208

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 208 / 812
Offset: 0x00
Register Name: TP_CTRL0
Bit
Read/
Write
Default
/Hex
Description
19:16
R/W
0x0
FS_DIV.
ADC Sample Frequency Divider
0000: CLK_IN/2
(20-n)
0001: CLK_IN/2
(20-n)
0010: CLK_IN/2
(20-n)
….
1111: CLK_IN/32
15:0
R/W
0x0
TACQ.
Touch panel ADC acquire time
CLK_IN/(16*(N+1))
1.15.7.2. TP CONTROL REGISTER 1
Offset: 0x04
Register Name: TP_CTRL1
Bit
Read/
Write
Default
/Hex
Description
31:20
/
/
/
19:12
R/W
0x0
STYLUS_UP_DEBOUNCE.
Stylus Up De-bounce Time setting
0x00: 0
….
0xff: 2N*(CLK_IN/16*256)
11:10
/
/
/
9
R/W
0x0
STYLUS_UP_DEBOUCE_EN.
Stylus Up De-bounce Function Select
0: Disable
1: Enable
8
/
/
/
7
R/W
0x1
CHOP_TEMP_EN
Chop temperature calibration enable
0: Disable
1: Enable
6
R/W
0x0
TOUCH_PAN_CALI_EN.
Touch Panel Calibration