TTP259
TonTouchTM
Preliminary
SPCON1 [21CH]: Special control register 1 [R/W], default value [0000]
Register
Bit3
INTTS
R/W
Bit2
FST2
R/W
Bit1
FST1
R/W
Bit0
FST0
R/W
Bit Name
Read/write
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
000
Frequency Shift Time (us)
OFF
4
001
010
8
011
16
32
64
128
256
100
101
110
111
SPCON2 [21DH]: Special control register 2 [R/W], default value [--00]
Register
Bit3
Bit2
Bit1
TPNIS
R/W
Bit0
CSAMODE
R/W
Bit Name
Read/write
-
-
-
-
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.
2015/05/25
Page 22 of 81
Ver: 1.1
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