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AS3675

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

8.5

General Purpose Input / Output

The GPIO is a highly-configurable general purpose input/output pin which can be used for the following functionality:

Digital Schmitt Trigger Input

Digital Output with 4mA Driving Capability at 2.8V Supply (VANA)

Tristate Output

Analog Input to the ADC

Default Mode for GPIO and VANA/GPI is Input (Pull-Down)

Figure 24. GPIO and VANA/GPI Blockdiagram

8.5.1 Unused GPIO Pin

If the pin GPIO is not used, they can be left open (an internal pulldown, which is enabled by default, will pull them to

GND).

sub_en4

0R/W

Inverts the signal from the pwm generator

Direct Operation (no inversion)

The signal from the pwm generator for which

the adder is enabled (curr33_adder = 1)

is inverted

Table 66. GPIO Pin Function Summary

GPIO Pin

Configuration

Additional Function

GPIO

Digital Input, Totem-Pole Output (Push/Pull),

Open Drain (PMOS or NMOS), High-Z, Pull-

Down or Pull-Up Resistor

ADC Input

VANA/GPI

Digital Input

ADC Input, LDO output

Table 65. Subtract Enable

Addr: 35h

Subtract Enable

Enable the inversion from the signal from the pwm generator

Bit

Bit Name

Default Access

Description

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