L9396 datasheet(52/109 Pages) STMICROELECTRONICS

52 / 109 page

Remote sensor interface

L9396

52/109

DS12539 Rev 6

RS_AUX_CFG register stores WSI Thresholds for fixed current trip-point method.

Bit 5

INIT: Allow access to RS_CFG_x

registers, RS_CTRL register bits 3

down to 0 and RS_AUX_CFG

0 => Off

1 => On

SSM_RESET

LBIST

Bit 4

DIAG: Allow access to WSS test

reg

0 => Off

1 => On

SSM_RESET

LBIST

Bit 3:0

CHxEN: Channel x Output enable,

updated by Reset Event or SPI

write

0 => Off

1 => On

SSM_RESET

LBIST

Table 28. RS_AUX_CFG register

Addr

Name

Type

Bits = 20

0001110

RS_AUX_CFG

Offset Thr Range= 19:10, Lo Thr Range = 9:0

Table 29. RS_AUX_CFG register bit description

Data Field

Description

Reset Value

Reset Event

Bit 19:18

SECOND_RANGE_SEL: (valid

only for adaptive thresholds):

00 => ∆Ith2MIN= 12.5 mA,

∆Ith2MAX = 15.5 mA;

01 => ∆Ith2MIN=11.0mA,

∆Ith2MAX=17.0mA;

10 => ∆Ith2MIN=9.5mA,

∆Ith2MAX=18.5mA;

11 => ∆Ith2MIN=8.0mA,

∆Ith2MAX=20.0mA;

SSM_RESET

LBIST

Bit 17:10

WSI_OFFS_TH[7:0]:

In case of fixed thresholds this

represents offset from low

threshold to calculate the high

threshold (see formula in

Section 4.1).

In case of adaptive thresholds this

is the offset to calculate maximum

value of base current IB0: IB0MAX=

IB0MIN + OFFSET_IB0.

In both cases LSB=93.75 µA typ.

0x34

SSM_RESET

LBIST

Table 27. RS_CTRL register bit description (continued)

Data Field

Description

Reset Value

Reset Event

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