TNETV2501INPGF datasheet(93/197 Pages) TI1

93 / 197 page

Functional Overview

December 2002 − Revised November 2008

SPRS206K

3.11.1.1

General-Purpose I/O Direction Register (IODIR)

Reserved

R, 00000000

IO7DIR

IO6DIR

IO5DIR

IO4DIR

IO3DIR

IO2DIR

IO1DIR

IO0DIR

R/W, 0

LEGEND: R = Read, W = Write, n = value at reset

Figure 3−32. GPIO Direction Register Layout (0x3400)

Table 3−33. GPIO Direction Register Bit Field Description†

BIT NAME

BIT NO.

ACCESS

RESET VALUE

DESCRIPTION

Reserved

15−8

00000000

Reserved

IOxDIR

7−0

R/W

00000000

Data direction bits that configure the GPIO pins as inputs or outputs.

IOxDIR = 0:

Configure corresponding GPIO pin as an input

IOxDIR = 1:

Configure corresponding GPIO pin as an output

† x = value from 0 to 7

3.11.1.2

General-Purpose I/O Data Register (IODATA)

Reserved

R, 00000000

IO7D

IO6D

IO5D

IO4D

IO3D

IO2D

IO1D

IO0D

R/W, pin

LEGEND: R = Read, W = Write, n = value at reset, pin = the reset value depends on the signal level on the corresponding I/O pin.

Figure 3−33. GPIO Data Register Layout (0x3401)

Table 3−34. GPIO Data Register Bit Field Description†

BIT NAME

BIT NO.

ACCESS

RESET VALUE

DESCRIPTION

Reserved

15−8

00000000

Reserved

IOxD

7−0

R/W

Depends on the signal level on

the corresponding I/O pin

Data bits that are used to control the level of the I/O

pins configured as outputs and to monitor the level of

the I/O pins configured as inputs.

If IOxDIR = 0, then:

IOxD = 0:

Corresponding GPIO pin is read as a low

IOxD = 1:

Corresponding GPIO pin is read as a

high

If IOxDIR = 1, then:

IOxD = 0:

Set corresponding GPIO pin to low

IOxD = 1:

Set corresponding GPIO pin to high

† x = value from 0 to 7

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