Datasheet
TSC2101
SLAS392D− JUNE 2003 − REVISED MAY 2005
www.ti.com
80
Programmed for
Host Controlled
Mode With Invalid
A/D Function
Selected
Detecting Touch
Sample,Conversion &
Averaging for
BAT1 input
Reading
BAT1−Data
Register
Waiting for Host to Write
into REG−00 of PAGE−01
Waiting for Host to
Write into REG−00
of PAGE−01
REG−00 of
PAGE−01
Is Updated
for
BAT1 Scan
Mode
Wait for Reference Power-Up Delay in Case
of Internal Ref Mode if Applicable
(As DATA_AVA
[D15−D14 = 01])
PINTDAV
SS DEACTIVATED
The time needed for continuous autoscan mode is given by:
t + N
INP
ǒ
NJ
N
AVG
ƪ
ǒ
N
BITS
) 1
Ǔ
8MHz
ƒ
conv
) n
1
) 12
ƫ
) 1
Nj
t
OSC
) 8 t
OSC
Ǔ
) n
2
t
OSC
) t
DEL
) n
3
) t
OSC
) n
4
t
OSC
where:
N
INP
= 1; if autoscan is selected for only one input AUX1, AUX2, TEMP1 or TEMP2
= 2; if autoscan is selected for two inputs AUX1−AUX2, AUX1−TEMP1, AUX1−TEMP2 etc
= 3; if autoscan is selected for three inputs AUX1−AUX2−TEMP1 or AUX1−AUX2−TEMP2
n
1
= 6 ; if f
conv
= 8 MHz
7 ; if f
conv
p 8 MHz
n
2
= 12 ; if one of the input selected is TEMP1
0 ; if measurement is for other than TEMP1
n
3
= 0 ; if external reference mode is selected or t
DEL
= 0.
3 ; if t
REF
= 0 ms or reference is programmed for power up all the times.
1 + t
REF
/125 ns ; if t
REF
p 0us and reference needs to power down between conversions.
t
REF
is the reference power up delay time.
n
4
= 0 ; if t
DEL
= 0.
= 7 ; if t
DEL
p 0
t
DEL
= Programmable delay in between conversion for nontouchscreen measurement
= 0 ; if programmable delay mode is disabled for nontouchscreen measurement
(1)
The above equation is valid only from second conversion onwards.
(2)
t
DEL
delay is generated by using internal oscillator clock whose typical frequency is 1 MHz in internal clock mode,
or MCLK/CLKDIV (as programmed in control register 14H/page 1) in external clock mode.
Programmed for
Host Controlled
Mode With Invalid
A/D Function
Selected
Detecting Touch
Sample,Conversion &
Averaging for
AUX input
Waiting for Host to
Write into REG−00
of PAGE−01
REG−00 of
PAGE−01
Is Updated
for Continous
AUX SCAN
Mode
Reading
AUX−Data
Register
Sample,Conversion &
Averaging for
AUX input
Sample,Conversion &
Averaging for
AUX input
Reading
AUX−Data
Register
(As DATA_AVA
[D15−D14 = 01])
PINTDAV
SS DEACTIVATED
Wait for Reference Power-Up Delay in Case
of Internal Ref Mode if Applicable