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TSC2117
Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D
Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
www.ti.com
SLAS550A – APRIL 2009 – REVISED JUNE 2009
Page 3/Register 6: Voltage Reference
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7
R/W
0
0: External reference is used for non-touch-screen measurement.
1: Internal reference is used for non-touch-screen measurement.
D6
R/W
0
0: Internal reference = 1.25 V
1: Internal reference = 2.5 V
D5
R/W
1
0: Internal reference powered up continuously for conversions
1: Internal reference powered up/down automatically based on whether conversion is in progress.
D4
R/W
0
Reserved
D3–D2
R/W
00
Reference Stabilization Time Before Conversion
00: 0
s
01: 100
s
10: 500
s
11: 1 ms
Note: These values are based on MCLK/DIV (page 3/register 17) = 8 MHz. Scale according to the
actual oscillator frequency.
D1
R/W
0
Reserved
D0
R/W
0
0: VBAT is the normal auxillary input (VBAT
≤ VREF).
1: VBAT = BAT is the battery input for battery measurement.
Page 3/Registers 7 to 8: Reserved
READ/
RESET
BIT
DESCRIPTION
WRITE
VALUE
D7–D0
R/W
XXXX XXXX
Reserved. Write only the reset value to these bits.
Page 3/Register 9: Status Bit
READ/
RESET
BIT
Description
WRITE
VALUE
D7
R
0
0: Pen touch is not detected.
1: Pen touch is detected.
D6
R
1
0: ADC is busy.
1: ADC is not busy.
D5
R
0
0: No new data is available.
1: New data is available. (This bit is cleared only after all the converted data have been completely read
out. This bit is not valid for the buffer mode.)
D4
R/W
X
Reserved. Write only the reset value to this bit.
D3
R
0
0: No new X data is available.
1: New data for X coordinate is available. (This bit is cleared only after the converted X data have been
read out. This bit is not valid for the buffer mode.)
D2
R
0
0: No new Y data is available.
1: New data for Y coordinate is available. (This bit is cleared only after the converted Y data have been
read out. This bit is not valid for the buffer mode.)
D1
R
0
0: No new Z1 data is available.
1: New data for Z1 coordinate is available. (This bit is cleared only after the converted Z1 data have
been read out. This bit is not valid for the buffer mode.)
D0
R
0
0: No new Z2 data is available.
1: New data for Z2 coordinate is available. (This bit is cleared only after the converted Z2 data have
been read out. This bit is not valid for the buffer mode.)
REGISTER MAP
139