STW4510 datasheet(20/57 Pages) STMICROELECTRONICS

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Functional description

STw4510

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3.2.8

Control registers

Control registers have the following functions:

–

Manage high power, sleep and power down modes.

–

Control the state machine

Switch ON/OFF control of LDO’s can be done by I2C for Vana(i) and Vmmc. Two commands

exist to turn ON/OFF the LDO’s, one is pdn_Vxxx and the other one is en_Vxxx (Vxxx

takes place of Vana1/2/3 or Vmmc); these commands have been put in different registers

and the pdn_Vxxx has a easier accessibility than en_Vxxx that needs to program the two

following registers 1F and 1E.

These two commands control the same LDO’s and a logical OR had been design between

these bits.

Figure 7.

LDO ON/OFF control

Note:

In the following tables, please set the bits noted “not used” or “reserved” at 0 when

programming the registers.

> 1

pdn_Vxxx

En_Vxxx

LDO ON/OFF control

Table 10.

Address

Type

Comment

00h, 01h, 02h

Reserved

03h

STw4510 version ID

10h

R/W

Application control register 1

11h

R/W

Application control register 2

12h to 1Dh

Test registers

1Eh to 1Fh

R/W

Power control registers

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