TSC2101_08 Datasheet, PDF (49/95 Pages) Texas Instruments – AUDIO CODEC WITH INTEGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER

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BIT
D7−D6
NAME
ADAVG
D5−D4 ADCR
D3−D1 PVSTC
D0
AVGFS
TSC2101
RESET
VALUE
00
00
000
0
SLAS392D− JUNE 2003 − REVISED MAY 2005
READ/
WRITE
R/W
FUNCTION
Converter Averaging Control. These two bits allow user to specify the number of averages the
converter will perform selected by bit D0, which selects either Mean Filter or Median Filter.
Mean Filter
Median Filter
00 => No average
No average
01 => 4-data average 5-data average
10 => 8-data average 9-data average
11 => 16-data average 15-data average
R/W Conversion Rate Control. These two bits specify the internal clock rate, which the ADC uses to
control performing a single conversion. These bits are the same whether reading or writing.
tconv + ^{N ) 4}
ƒ_INTCLK
Where f_INTCLK is the internal clock frequency. For example, with 12-bit resolution and a 2 MHz
internal clock frequency, the conversion time is 8 µs. This yields an effective throughput rate of
125 kHz.
00 => 8 MHz internal clock rate (use for 8-bit resolution only)
01 =>4 MHz internal clock rate (use for 8-bit/10-bit resolution only)
10 =>2 MHz internal clock rate
11 =>1 MHz internal clock rate
R/W Panel Voltage Stabilization Time Control. These bits allow user to specify a delay time from the
time the touch screen drivers are enabled to the time the voltage is sampled and a conversion
is started. This allows the user to adjust for the settling of the individual touch panel and external
capacitances.
000 => 0 µs stabilization time
001 => 100 µs stabilization time
010 => 500 µs stabilization time
011 => 1 ms stabilization time
100 => 5 ms stabilization time
101 => 10 ms stabilization time
110 => 50 ms stabilization time
111 => 100 ms stabilization time
R/W Average Filter Select
0 => Mean Filter
1 => Median Filter
REGISTER 01H: Status Register
BIT
NAME
D15−D14 PINTDAV
D13 PWRDN
D12
HCTLM
D11
DAVAIL
RESET
VALUE
10
0
0
0
READ/
WRITE
R/W
R
R
R
FUNCTION
Pen Interrupt or Data Available. These two bits program the function of the PINTDAV pin.
00 => Acts as PEN interrupt (active low) only. When PEN touch is detected, PINTDAV goes low.
01 => Acts as data available (active low) only. The PINTDAV goes low as soon as one set of ADC
conversion(s) is completed. For scan mode, PINTDAV remains low as long as all the
appropriate registers have not been read out.
10 => Acts as both PEN interrupt and data available. When PEN touch is detected, PINTDAV goes
low. PINTDAV goes high once all the selected conversions are over.
11 => Same as 10
TSC−ADC Power down status
0 => TSC−ADC is active
1 => TSC−ADC stops conversion and powers down
Host Controlled Mode Status
0 => Host controlled mode
1 => Self (TSC2101) controlled mode
Data Available Status
0 => No data available.
1 => Data is available(i.e one set of conversion is done)
Note:− This bit gets cleared only after all the converted data have been completely read out. This bit
is not valid in case of buffer mode.
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