L5953 datasheet(14/24 Pages) STMICROELECTRONICS

14 / 24 page

L5953

14/24

Table 2. Status Register.

Table 3. Status Register Description

Table 4. Diagnostic Register.

s15

s14

s13

s12

s11

s10

REG2 HSD1

HSD2

TBD

PWM

Freq.

PWM

TBD

Test

Mode

START

DIAG

s15

REG2 Linear Voltage

Regulator 1.5 to 3.3V

Regulator off

Regulator on

s14

High Side Driver 1

HSD1 off

HSD1 on

s13

High Side Driver 2

HSD2 off

HSD2 on

s12

TBD

s11

TBD

s10

PWM switching frequency

260kHz

400kHz

PWM Voltage Regulator

PWM1 off

PWM1 on

TBD

Test Mode

Test Mode off

Test Mode on

NOTE: in this case the bits s15 - s2 are internally

set to 0 (regulators and high side drivers are in off

condition)

Diagnostic

Diagnostic off

Starts the diagnostic procedure:

- in Test Mode if s1=1;

- during normal operation if s1=0

If s1=0 and s0=1, must be s14 = 1 (HSD1 ON)

and s13=1 (HSD2 ON)

Test mode

HSD1W1

HSD1W2

HSD1W3

HSD2W1

HSD2W2

HSD2W3

THW

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