L5953 Просмотр технического описания (PDF) - STMicroelectronics

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производитель

L5953

Multiple switching voltage regulator

STMicroelectronics 

L5953

SPI interface

.

Table 8. Instruction set

Instruction

Description

Instruction Format

WREN

WRDI

WSTA

RDIA

RSTA

Set write enable latch

Reset write enable latch

Write status register

Read diagnostic register

Read status register

00000110

00000100

00000010

00000101

00000011

.

Table 9. Status register

s15 s14 s13 s12 s11 s10 s9 s8 s7 s6 s5 s4 s3 s2 s1 s0

REG

2

HSD

1

HSD

2

TBD

PWM

TBD

PWM TBD

freq.

TBD

TBD

TBD

TBD

TBD

TBD

Test

mode

START

DIAG

Table 10. Status register description

0

1

s15

REG2 linear voltage

regulator 1.5 to 3.3V

Regulator off

s14 High side driver 1

HSD1 off

s13 High side driver 2

HSD2 off

s12 TBD

s11 TBD

s10 PWM switching frequency 260kHz

s9 PWM voltage regulator

PWM1 off

s8 TBD

s7 TBD

s6 TBD

s5 TBD

s4 TBD

s3 TBD

s2 TBD

s1 Test mode

Test mode off

s0 Diagnostic

Diagnostic off

Regulator on

HSD1 on

HSD2 on

400kHz

PWM1 on

Test mode on (1)

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)

1. In this case the bits s15 - s2 are internally set to 0 (regulators and high side drivers are in off condition)

19/31

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