TSC2004 datasheet(27/62 Pages) TI2

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TSC2004

SBAS408E – JUNE 2007 – REVISED MARCH 2008

Table 6. Control Byte 1 Bit Register Description (D7 = 1)

BIT

NAME

DESCRIPTION

Control Byte ID

D6-D3

C3:C0

Converter Function Select as detailed in Table 7

0: 10 Bit

1: 12 Bit

Software Reset. This bit is self-clearing.

SWRST

1: Reset all register values to default

STS

Stop bit for all converter functions. This bit is self-clearing.

Bit D7: Control Byte ID

1: Control Byte 1 (start conversion and channel select and conversion-related configuration).

0: Control Byte 0 (read/write data registers and non-conversion-related controls).

Bits D6-D3: C3-C0

Converter function select bits. These bits select the input to be converted, and the converter function to be

executed. Table 7 lists the possible converter functions.

Table 7. Converter Function Select

FUNCTION

Touch screen scan function: X, Y, Z1, and Z2 coordinates converted and the results returned

to X, Y, Z1, and Z2 data registers. Scan continues until either the pen is lifted or a stop bit is

sent.

Touch screen scan function: X and Y coordinates converted and the results returned to X and

Y data registers. Scan continues until either the pen is lifted or a stop bit is sent.

Touch screen scan function: X coordinate converted and the results returned to X data

Touch screen scan function: Y coordinate converted and the results returned to Y data

Touch screen scan function: Z1 and Z2 coordinates converted and the results returned to Z1

and Z2 data registers.

Auxiliary input converted and the results returned to the AUX data register.

A temperature measurement is made and the results returned to the Temperature

Measurement 1 data register.

A differential temperature measurement is made and the results returned to the Temperature

Measurement 2 data register.

Auxiliary input is converted continuously and the results returned to the AUX data register.

Touch screen panel connection to X-axis drivers is tested. The test result is output to

PINTDAV and shown in STATUS register.

Touch screen panel connection to Y-axis drivers is tested. The test result is output to

PINTDAV and shown in STATUS register.

RESERVED (Note: any condition caused by this command can be cleared by setting the STS

bit to 1).

Touch screen panel short-circuit (between X and Y plates) is tested through Y-axis. The test

result is output to PINTDAV and shown in the STATUS register.

X+, X– drivers status

Y+, Y– drivers status

Y+, X– drivers status

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