TTP259-ASFN datasheet(65/81 Pages) TONTEK

65 / 81 page

Preliminary

TTP259

TonTouch

2015/05/25

Page 65 of 81

Ver: 1.1

3. IO Pad Cells

The main features of IO pad cell are including ESD/EFT protection and

general IO access. A general IO pad cell can be configured as input with or

without pull-up resistor, or working as a CMOS or NMOS output driver. The

input pad cell must have pull-up resistor for avoiding a floating state when

user doesn’t care or not be used. For concerning the standby current, user can

use data register or IO control register to fit the application.

. IO File Register

PAC[012H]: Port A IO control register [R/W], default value [1111]

Bit3

Bit2

Bit1

Bit0

Bit Name

PAC2

PAC1

PAC0

Read/Write

R/W

PAC2~PAC0: Port A IO control data.

PA[013H]: Port A output data register [R/W], default value [1111]

Bit3

Bit2

Bit1

Bit0

Bit Name

PA2

PA1

PA0

Read/Write

R/W

PA2~PA0: Port A output data.

PBC[014H]: Port B IO control register [R/W], default value [1111]

Bit3

Bit2

Bit1

Bit0

Bit Name

PBC3

PBC2

PBC1

PBC0

Read/Write

R/W

PBC3~PBC0: Port B IO control data.

PB[015H]: Port B output data register [R/W], default value [1111]

Bit3

Bit2

Bit1

Bit0

Bit Name

PB3

PB2

PB1

PB0

Read/Write

R/W

PB3~PB0: Port B output data.

TTP259-ASFN Datasheet(PDF) 65 Page - Tontek Design Technology

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