Datasheet

Touch Sensor Short-Circuit Test
TSC2006
SBAS415C – JUNE 2007 – REVISED MARCH 2009 ......................................................................................................................................................... www.ti.com
If the TBM bits of CFR1 detailed in Table 20 are all set to '1', a short-circuit in the touch sensor can be detected.
C3-C0 = 1011: Reserved.
C3-C0 = 1100: PINTDAV = 0 during this short-circuit test. A '1' shown at end of the test indicates there is no
short-circuit detected (through Y-axis) between the flex and stable layers. If there is a short-circuit detected,
PINTDAV stays low until a stop bit (STS set to '1') is issued.
RM— Resolution select. If RM = 1, the conversion result resolution is 12-bit; otherwise, the resolution is 10-bit.
This bit is the same RM bit shown in CFR0.
SWRST— Software reset input. All register values are set to default value if a '1' is written to this bit. This bit must
be set to '0' in Control Byte 1 in order to cancel the software reset and resume normal operation.
STS— Stop bit for all converter functions. When writing a '1' to this register, this bit aborts the converter function
currently running in the TSC2006. A '0' must be written to this register in order to end the stop bit. This bit can
only stop converter functions; it does not reset any data, status, or configuration registers. This bit is the same
STS bit shown in CFR0, but can only be read through the CFR0 register with different interpretations.
Table 8. STS Bit Operation
OPERATION VALUE DESCRIPTION
Write 0 Normal operation
Write 1 Stop converter functions and power down
Table 9. Control Byte 0 Bit Register Description (D7 = 0)
BIT NAME DESCRIPTION
1: Control Byte 1 — start conversion, channel select, and converison-related configuration
D7 Control Byte ID
0: Control Byte 0 — read/write data registers and non-conversion-related controls
D6-D3 A3-A0 Register Address Bits as detailed in Table 10
D2 RESERVED A '0' must be set in this bit for normal operation
Power Not Down Control
1: A/D converter biasing circuitry is always on between conversions, but is shut down after the converter
D1 PND0 function stops
0: A/D converter biasing circuitry is shut down either between conversions or after the converter function
stops
TSC Internal Register Data Flow Control
D0 R/ W 1: Read from TSC internal registers
0: Write to TSC internal registers
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