STW4811MBRASLASHLF datasheet(45/86 Pages) STMICROELECTRONICS

45 / 86 page

Functional description

STw4811M/STw4811N

44/85

4.3.8

Power supply domains

Table 30 lists the register bits that control STw4811 supply domains for each supply.

Note:

More details on VMMC supply are given in Section 4.5

4.3.9

Thermal shut-down

A thermal sensor is used to monitor the die temperature.

●

As soon as the die temperature exceeds the thermal warning rising threshold, VDDOK

ball goes to “0” and ‘it_warn’ bit is set to “1” (

configuration 1 register - Table 18). The IC

turns back VDDOK ball to “1” and ‘it_warn’ bit to “0” when the device temperature drops

below the thermal warning falling threshold of the thermal sensor.

●

A second thermal detection level, thermal shutdown threshold, puts all STw4811

supplies OFF, the supplies goes back to ON state when the temperature is under the

thermal shutdown threshold and after a new startup phase.

Table 30.

Power supply domains

Supply

name

Description

Supply domains

High power

Sleep

Power down

VCORE

STEP-DOWN

vcore_sel[3:0]

vcore_sleep[3:0]

vcore_sleep

vcore_force_sleep

en_vcore

VIO_VMEM STEP-DOWN

vio_vmem_sleep

vio_vmem_force_sleep

VPLL

LDO

vpll_sel[1:0]

en_vpll

VANA

LDO

en_vana

VAUX

LDO

vaux_sel[1:0]

vaux_sleep

vaux_force_sleep

pdn_vaux

VMMC

LDO

vmmc_sel[2:0]

pdn_vmmc

Table 31.

Thermal threshold values

Description

Min

Typ

Max

Unit

Thermal warning threshold

Rising threshold

134

140

149

°C

Falling threshold

117

123

131

°C

Thermal shutdown threshold

Threshold

149

155

164

°C

STW4811MBRA/LF 数据表(PDF) 45 Page - STMicroelectronics

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