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Configuration Register 2

TSC2005

SBAS379C – DECEMBER 2006 – REVISED MARCH 2008

Configuration register 2 (CFR2) defines the preprocessor configuration.

Table 22. Configuration Register 2 (Reset Value = 0000h)

MSB

LSB

D15

D14

D13

D12

D11

D10

MAVE

PINTS1

PINTS0

TZ1

TZ0

AZ1

AZ0

Resrvd

AUX

TEMP

PINTS1 (default 0)—This bit controls the output format of the PINTDAV pin. When this bit is set to '0', the output

format is shown as the AND-form of internal signals of PENIRQ and DAV). When this bit is set to '1', PINTDAV

outputs PENIRQ only.

PINTS0 (default 0)—This bit selects what is output on the PINTDAV pin. If this bit set to '0', the output format of

PINTDAV depends on the selection made on the PINTS1 bit. If this bit set to '1', the internal signal of DAV is

output on PINTDAV.

Table 23. PINTSx Selection

PINTS1

PINTS0

PINTDAV PIN OUTPUT =

An AND combination of PENIRQ (active low) and DAV (active high).

Data available, DAV (active low).

An interrupt, PENIRQ (active low) generated by pen-touch.

Data available, DAV (active low).

M1, M0, W1, W0 (default 0000)—Preprocessing MAV filter control. Note that when the MAV filter is processing

data, the STS bit and the corresponding DAV bits in the status register indicate that the converter is busy until all

conversions necessary for the preprocessing are complete. The default state for these bits is 0000, which

bypasses the preprocessor. These bits are the same whether reading or writing.

TZ1 and TZ0, or AZ1 and AZ0 (default 00)—Zone detection bit definition (for TEMP or AUX measurements).

TZ1 and TZ0 are for the TEMP measurement. AZ1 and AZ0 are for the AUX measurement. The action taken in

zone detection is to store the processed data in the corresponding data registers and to update the

corresponding DAV bits in status register. If the processed data do not meet the selected criteria, these data are

ignored and the corresponding DAV bits are not updated. When zone detection is disabled, the processed data

are simply stored in the corresponding data registers and the corresponding DAV bits are updated without any

comparison of criteria. Note that the converted samples are always processed according to the setting of the

MAVE bits for AUX/TEMP before zone detection takes effect. See Table 30 for thresholds.

Table 24. Zone Detection Bit Definition

TZ1/AZ1

TZ0/AZ0

FUNCTION

Zone detection is disabled.

When the processed data is below low threshold

When the processed data is between low and high thresholds

When the processed data is above high threshold

MAVE (default is 00000)—MAV filter function enable bit. When the corresponding bit is set to 1, the MAV filter

setup is applied to the corresponding measurement.

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