AS3701 datasheet(48/110 Pages) AMSOSRAM

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ams Datasheet

Page 47

[v1-11] 2016-Dec-14

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AS3701 − Detailed Description – System Functions

Figure 55:

GPIO Pin Characteristics

GPIO Pins: Shows the key electrical parameter of the GPIO pins. VSUP = 2.7 to 5.5V; unless otherwise mentioned

IO Functions

Normal IO Operation

If set to input, the logic level of the signal present at the GPIOx

pin can be read from gpioX_in [GPIOsignal_in]. This mode is also

used for the ON/OFF control of the DCDC and LDOs. The

selection, which regulator is controlled by which GPIO, is done

with the gpio_ctrl_sdX [GPIO_ctrl2] or gpio_ctrl_ldoX [GPIO_

ctrl2] bits.

The gpioX_mode [GPIOxcontrol] should be set to input.

The gpioX_iosf [GPIOxcontrol] should be set to gpioX_in.

If the output mode is chosen, gpioX_out [GPIOsignal_out]

specifies the logic level of the GPIOx pin.

The gpioX_mode [GPIOxcontrol] should be set to output.

The gpioX_iosf [GPIOxcontrol] should be set to gpioX_out.

For GPIO1 and GPIO2, the logic level of the output signal can

be visualized via the Current sinks. In this case the gpioX_mode

[GPIOxcontrol] should be set to CURRx.

Symbol

Parameter

Note

Min

Typ

Max

Unit

VGPIO_max

Max voltage on GPIOx

pins

Pin VSUP is used as

supply for the GPIO pins

VSUP + 0.3

VOL

Low level output voltage

IOL=+1mA

digital output

+0.4

VOH

High level output

voltage

IOH=–1mA; digital

push-pull output

0.8*VSUP

VIL

Low level input voltage

digital input

20% of

VSUP

VIH

High level input voltage

digital input

60% of

VSUP

ILEAKAGE

Leakage current

high impedance

μA

Rpull-up

Pull-up resistance

if enabled;

VSUP = 3.7V

300

kΩ

Rpull-down

Pull-down resistance

if enabled;

VSUP = 3.7V

300

kΩ

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