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Configuration Register 2

TSC2004

SBAS408E – JUNE 2007 – 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 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

MAVE MAVE MAVE MAVE MAVE

PINTS1 PINTS0 M1 M0 W1 W0 TZ1 TZ0 AZ1 AZ0 Resrvd

X Y Z 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 =

0 0 AND combination of PENIRQ (active low) and DAV (active high).

0 1 Data available, DAV (active low).

1 0 Interrupt, PENIRQ (active low) generated by pen-touch.

1 1 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

0 0 Zone detection is disabled.

0 1 When the processed data are below low threshold

1 0 When the processed data are between low and high thresholds

1 1 When the processed data are 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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