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DA9131

High-Performance, Dual-Channel DC-DC Converter for

Mobile and Portable Applications

Datasheet

Revision 2.0

11-Aug-2021

CFR0011-120-00

26 of 56

4.2.3

GPIO

4.2.3.1

GPIO Pin Assignment

The DA9131 provides up to five GPIO pins, three if the I2C is enabled, see Table 16. These registers

are OTP programmable. When CONF_EN = 1 GPIO0 can be used for chip configuration.

Any register settings for GPIO3 and GPIO4 are ignored and GPIO3 and GPIO4 function as SCL and

SDA respectively if I2C_EN = 1.

Table 16: GPIO Pin Assignment

OTP Option

GPIO Pin

Available

GPIOs

I2C_EN

CONF_EN

CONF/

GPIO0

GPIO1

GPIO2

SCL/

GPIO3

SDA/

GPIO4

1’b0

GPIO0

GPIO1

GPIO2

GPIO3

GPIO4

1’b1

CONF

GPIO1

GPIO2

GPIO3

GPIO4

1’b1

1’b0

GPIO0

GPIO1

GPIO2

SCL

SDA

1’b1

CONF

GPIO1

GPIO2

SCL

SDA

4.2.3.2

GPIO Function

The GPIOs pins are configurable as the following functions in register GPIO<x>_MODE (x = 0 to 4):

● Buck1 enable input (EN1)

● Buck2 enable input (EN2)

● Buck1 and Buck2 enable input (EN1 & EN2)

● Buck1 DVC control input (DVC1)

● Buck2 DVC control input (DVC2)

● Buck1 and Buck2 DVC control input (DVC1 & DVC2)

● Buck1 and Buck2 OTP setting reload input (RELOAD)

● Buck1 power-good output (PG1)

● Buck2 power-good output (PG2)

● Buck1 and Buck2 power-good output (PG1 & PG2)

● System good output (SG)

● Interrupt output (nIRQ)

Table 17: GPIO Function Configuration

GPIO<x>_MODE[3:0]

Function

IO Condition

4’h0

GPIO disable

HiZ

4’h1

EN1

4’h2

EN2

4’h3

EN1 & EN2

4’h4

DVC1

4’h5

DVC2

4’h6

DVC1 & DVC2

4’h7

RELOAD

4’h8

PG1

Out

4’h9

PG2

Out

DA9131 Datasheet(PDF) 26 Page - Dialog Semiconductor

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