Cirrus Logic EP93xx - Manual (Page 757)

DS785UM1 25-19
Copyright 2007 Cirrus Logic
Analog Touch Screen Interface
EP93xx User’s Guide
2
5
2
5
25
TSXYMaxMin
Address:
0x8090_0004
Default:
0x0000_0000
Definition:
Analog Touch screen MAX and MIN move Register.
Bit Descriptions:
YMAX[11:4],XMAX[11:4]:Defines the amount of x-y distance from a previous
touch that represents an invalid data point. The user could
not move to a new location this many pixels away within
the scan time limit. The definition can be from 16 to 4096,
in increments of 16 decode locations, in a 4096 x 4096
decode array.
YMIN[7:0],XMIN[7:0]:Defines the amount of x-y distance from a previous
touch value to a new touch value for a touch detection to
initiate another interrupt to the ARM Core. The x-y box
definition can be up to 512 x 512 (+/-256).
TSXYResult
Address:
0x8090_0008
Default:
0x0000_0000
Definition:
Analog Touch screen X and Y result Register.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
YMAX[11:4] XMAX[11:4]
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
YMIN[7:0] XMIN[7:0]
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
SDR RSVD Y
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
AD AD_X