Cirrus Logic EP93xx User Manual
Page 758
25-20
DS785UM1
Copyright 2007 Cirrus Logic
Analog Touch Screen Interface
EP93xx User’s Guide
2
5
2
5
25
Bit Descriptions:
RSVD:
Reserved. Unknown during read.
SDR:
Synchronous Data Ready. This bit is set when new
conversion data from the ADC digital filter appears the
TSXYResult register. The bit is cleared when the
TSXYResult register is read. The bit is always clear unless
the touch screen scanning state machine is disabled
(TSSetup bit 15 is zero).
Y, AD_X:
X and Y controller calculated reading when touch screen
controller is enabled at 12-bit resolution. The interrupt
output is cleared when this register is read.
AD, AD_X:
Direct analog-to-digital controller output when touch
screen controller is disabled at 16-bit resolution.
TSDischarge, TSXSample, TSYSample, TSDirect, TSDetect
Address:
TSDischarge: 0x8090_000C
TSXSample: 0x8090_0010
TSYSample: 0x8090_0014
TSDirect: 0x8090_0018
TSDetect: 0x8090_001C
Default:
0x0000_0000
Definition:
Analog switch control Registers.
Bit Descriptions:
RSVD:
Reserved. Unknown during read.
SCTL[29]:
Analog switch control value for direct analog switch control
only (TSDirect) when the touch screen controller is
disabled. Controls DAC routing to ADC input.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RSVD
SCTL[29]
SCTL
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SCTL