STW4810BHD datasheet(23/72 Pages) STMICROELECTRONICS

23 / 72 page

STw4810

4 Functional description

Rev3

23/72

REGISTERS CONTROLLED BY MAIN I2C BUS

I²C controlled registers are controlled through the main serial I2C interface, SCL and SDA balls.

SD MMC control register

In Flash OTP two registers allow to program STw4810 energy management part.

These two registers are at address 1E and 1F and must be programmed with 1F register first

followed by 1E register.

Table 17.

SD MMC control register (11h)

765

432

Bit name

pdn_

vaux

it_warn

monitori

ng_vio_

vmem_

vcore

gpo2

gpo1

sel_vmmc<1:0>

pdn_

vmmc

Type

R/W

R(1)

These bits are reset (0) after reading

R/W

Bits

Name

Value

Settings

Default

pdn_vaux

Inactive

Enable LDO vaux

6it_warn

Below temperature threshold

Above temperature threshold

monitoring_vio_

vmem_vcore

Outputs in the good range

Outputs lower than expected on vio_vmem or vcore

gpo2

Output GPO2 HZ

Output GPO2 Low

gpo1

Output GPO1 HZ

Output GPO1 low

[2:1]

sel_vmmc<1:0>

1.8V selection

2.85V selection

3V selection

pdn_vmmc

Inactive

Enable SD/MMC or SDIO function.

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