TTP255 datasheet(4/49 Pages) TONTEK

4 / 49 page

Preliminary

TTP255

TonTouch

12’/08/21

Page 4 of 49

Ver3.0

PC0~PC3

TP0~TP3

IO/I

PC/TP

IO port or touch pad input

PD0~PD3

TP4~TP7

IO/I

PD/TP

IO port or touch pad input

C+

Touch sensor input

C-

Touch signal output with pull up R

PE0~PE3

TP8~TP11

IO/I

PE/TP

IO port or touch pad input

PD0~PD3

Figure IO-A

STD IO with external input

PE0~PE3

Figure IO-A

STD IO with external input

PF0~PF3

Figure IO-A

STD IO with external input

§ Pin Description:

Pin Name Share Pin

I/O

Pin no. Mask Option

Pin Description

RSTB

External reset input, active low 50k pull-up(5v)

VDD

Power

Positive power supply

OSCI

OSCO

RCOSC/PF2

RCOSC4/PF3

I/I

O/I

RC/ Crystal

/Port F

Crystal/resonator/RC

oscillator

terminals or PF2~PF3

Input port

PA0

PA1(TCP1I)

PA2

PA3

INT0/VPP

I/O port with external interrupt

input (PA0). PA1 used as clock

inputs of timer/counter 1.

PB0(PFD1)

PB1(PFD2)

PB2(pfd1b)

PB3(pfd2b)

INT1/SCL

SDA

TP12

TP13

PB/TP

I/O port with external interrupt

input (PB0). I/O port with internal

signal output

VSS

Power

Negative power supply, ground

PF0~PF1

TP14~TP15

IO/I

PF/TP

IO port or touch pad input

§ IO Cell type Description:

Pin Name

I/O Type

Description

PA0~PA3

Figure IO-A

STD IO with external input

PB0~PB3

Figure IO-B

STD IO with internal output

PC0~PC3

Figure IO-A

STD IO with external input

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