STW4810 datasheet(28/79 Pages) STMICROELECTRONICS

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STw4810

Functional description

27/78

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 18.

SD MMC control register (11h)

76543

210

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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