TTP259-ASFN datasheet(22/81 Pages) TONTEK

22 / 81 page

Preliminary

TTP259

TonTouch

2015/05/25

Page 22 of 81

Ver: 1.1

SPCON1 [21CH]: Special control register 1 [R/W], default value [0000]

Bit3

Bit2

Bit1

Bit0

Bit Name

INTTS

FST2

FST1

FST0

Read/write

R/W

FST2~FST0: Frequency Shift Time selector.

INTTS: INT0 Interrupt input type selector. (0: Schmitt; 1: comparator)

Compare reference voltage use bandgap voltage 1.12V.

FST2~FST0

Frequency Shift Time (us)

000

OFF

001

010

011

100

101

110

128

111

256

SPCON2 [21DH]: Special control register 2 [R/W], default value [--00]

Bit3

Bit2

Bit1

Bit0

Bit Name

TPNIS

CSAMODE

Read/write

R/W

CSAMODE: CSA mode selector for touch pad scan.

0: C array as a touch pad capacitance compensation.

1: C array as a touch pad current compensation.

TPNIS: Touch detect circuit type selector.

0: TPNI use Schmitt trigger output signal.

1: TPNI use comparator output signal.

TTP259-ASFN Datasheet(PDF) 22 Page - Tontek Design Technology

TTP259-ASFN Datasheet(HTML) 22 Page - Tontek Design Technology

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