Datasheet

TSC2101
SLAS392D JUNE 2003 REVISED MAY 2005
www.ti.com
81
Port Scan Operation
The time needed to complete one set of port scan conversions is given by:
t
coordinate
+ 3
NJN
AVG
ƪ
ǒ
N
BITS
) 1
Ǔ
8MHz
ƒ
conv
) n
1
) 12
ƫ
) 1Nj t
OSC
) 31 t
OSC
) n
2
t
OSC
where:
n
1
= 6 ; if ƒ
conv
= 8 MHz
7 ; if ƒ
conv
8 MHz
n
2
= 0 ; if external reference mode is selected
3 ; if t
REF
= 0 µs or reference is programmed for power up all the time.
1 + t
REF
/125 ns; if t
REF
0 µs and reference needs to power down between conversions.
t
REF
is the reference power up delay time.
Programmed for
Host Controlled
Mode With Invalid
A/D Function
Selected
Detecting Touch
Sample,Conversion &
Averaging for
BAT1 & BAT2 & AUX input
Reading
BAT1
Data
Register
Waiting for Host to
Write into REG00
of PAGE01
Waiting for Host to Write into REG00
of PAGE01
REG00 of
PAGE01
is updated
for
PORT SCAN
Mode
Reading
BAT2
Data
Register
Reading
AUXData
Register
(As DATA_AVA
[D15D14 = 01])
PINTDAV
SS DEACTIVATED
Wait for Reference Power-Up Delay in Case
of Internal Ref Mode if Applicable
ADC CHANNEL DIGITAL FILTER FREQUENCY RESPONSES
Figure 39. Pass-Band Frequency Response of ADC Digital Filter