DA6021 datasheet(180/225 Pages) RENESAS

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DA6021

HIGHLY INTEGRATED POWER MANAGEMENT IC FOR

INTEL® ATOM™ Z3000 PROCESSOR

Company Confidential

Data Sheet

Version 3.A - Final

31-Jan-14

180 of 224

www.dialog-semiconductor.com

DIR

GPIO Configuration

Input Analog

Input Digital

Output Open-Drain

Output CMOS

Table 104: GPIO Direction Configuration

PULL_EN

PULL_DIR

PULL_LVL

GPIO Configuration

No pull-up / pull-down

2-KOhm pull-down

50-KOhm pull-down

2-KOhm pull-up

50-KOhm pull-up

Table 105: GPIO Pull-up/Pull-down Configuration

GPIO Digital Features

17.3

De-Bouncing

17.3.1

When a GPIO is used as a digital input, a 32ms de-bounce circuit can be assigned to the input path. The input

signal should be stable for the de-bounce time before the de-bounce circuit flags the output. If GPIOx_DEB is

set, de-bouncing is enabled. All pads share the same de-bounce time setting. High and low pulses that are

shorter than 32ms +/- 4ms are filtered out. To reduce power consumption, a 3 bit counter running with the 4ms

tick is used to generate the de-bounce functionality.

Status Register

17.3.2

The GPIO status is synchronized, de-bounced and can be read back from the GPIOx_CTLI[0] read-only register.

Interrupt Functionality

17.3.3

In addition to the status information, the SOC can configure a GPIO to flag an edge sensitive interrupt on a state

change of the GPIO PAD cell. Interrupts can be generated on rising and/or falling edges of GPIO inputs.

DA6021 provides includes an internal interrupt interface collecting all events from various modules to generate

the interrupt signal to the SOC. The interrupt options are defined in GPIOx_IRQCFG register.

Analogue Mode

17.4

In case the GPIOx_DIR register is set to 0x0, the PAD is used as analogue PAD and is disconnected from the

digital. In this case the input (analogue input) will be feeding some analogue circuitry.

Alternative Functions

17.5

GPIOs also enable the use of alternative functions In order to use these GPIO need to be configured first. This

consists of setting the GPIPO as input or output and then, selecting the mapping functionality to select which

particular GPIO a certain alternate function should be related.

DA6021 Datasheet(PDF) 180 Page - Renesas Technology Corp

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