AS3677 datasheet(48/68 Pages) AMSCO

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www.austriamicrosystems.com/AS3677

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AS3677

Datasheet - D e ta i l e d D e s c r i p t i o n

Table 82. GPIO control

Addr: 1Eh

GPIO control

This register controls GPIO3 and GPIO31 pin functions.

Bit

Bit Name

Default Access

Description

1:0

gpio1_mode

R/W

Defines the direction for pin ALS/GPIO1

Input only

Output (push and pull)

Output (open drain, only push; only NMOS is

active)

Output (open drain, only pull; only PMOS is

active)

3:2

gpio1_pulls

R/W

Adds the following pullup/pulldown to pin ALS/GPIO1; this

is independent of setting of bits gpio1_mode

None

Pulldown

Pullup

ADC input (gpio1_mode = XX); recommended

for analog signals

5:4

gpio2_mode

R/W

Defines the direction for pin GPIO2

Input only

Output (push and pull)

Output (open drain, only push; only NMOS is

active)

Output (open drain, only pull; only PMOS is

active)

7:6

gpio2_pulls

R/W

Adds the following pullup/pulldown to pin GPIO2; this is

independent of setting of bits gpio2_mode

None

Pulldown

Pullup

ADC input (gpio2_mode = XX); recommended

for analog signals

Table 83. GPIO control 3

Addr: 1Fh

GPIO control 3

This register enables low current mode for GPIO3s.

Bit

Bit Name

Default Access

Description

1:0

gpio3_mode

R/W

Defines the direction for pin GPIO3

Input only

Output (push and pull)

Output (open drain, only push; only NMOS is

active)

Output (open drain, only pull; only PMOS is

active)

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