AS3677 datasheet(47/68 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

8.5.3

GPIO Registers

VIHGPIO

High Level Input

Voltage

pins ALS/GPIO1, GPIO2 and

GPIO3

1.38

VANA

VILGPIO

Low Level Input

Voltage

0.52

VHYS

Hysteresis

0.1

ILEAK

Input Leakage Current

to VANA or VSS

-5

µA

VOHGPIO

High Level Output

Voltage

at Iout

0.8·VANA

VOLGPIO

Low Level Output

Voltage

0.2·

VANA

VOLINT

Low Level Output

voltage

Pin INT at 4mA

0.2

IOUT

Driving Capability

VANA = 2.8V,

gpio1_low_curr or

gpio2_low_curr or

gpio3_low_curr= 1

VANA = 2.8V,

gpio1_low_curr or

gpio2_low_curr or

gpio3_low_curr= 0

CLOAD

Capacitive Load

1. Limited by LDO driving capability - see LDO on page 9

Table 80. GPIO output 2

Addr: 50h

GPIO output 2

This register controls GPIO3 outputs.

Bit

Bit Name

Default Access

Description

gpio1_out

0R/W

Writes a logic signal to pin ALS/GPIO1; this is independent

of any other bit setting e.g., gpio1_mode Table 82.

gpio2_out

0R/W

Writes a logic signal to pin GPIO2; this is independent of

any other bit setting e.g., gpio2_mode Table 82

gpio3_out

0R/W

Writes a logic signal to pin GPIO3; this is independent of

any other bit setting e.g., gpio3_mode Table 83

Table 81. GPIO signal 2

Addr: 51h

GPIO signal 2

This register controls GPIO3 outputs.

Bit

Bit Name

Default Access

Description

gpio1_in

N/A

Reads a logic signal from pin ALS/GPIO1; this is

independent of any other setting e.g.,Table 82 except

gpio1_pulls=11

gpio2_ in

N/A

Reads a logic signal from pin GPIO2; this is independent of

any other setting e.g.,Table 82 except gpio2_pulls=11

gpio3_ in

N/A

Reads a logic signal from pin GPIO3; this is independent of

any other setting e.g.,Table 83 except gpio3_pulls=11

Table 79. GPIO and digital inputs DC Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Unit

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