L99MH98 datasheet(98/147 Pages) STMICROELECTRONICS

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Bit

Name

Description

HB_PWM4 [2]

PWM mapping on HB4

This 3 bits register is used to indicate which PWM signal is applied to the HS or LS of the HB4

000 = LS of HB mapped on PWM1

001 = LS of HB mapped on PWM2

010 = LS of HB mapped on PWM3

011 = HS of HB mapped on PWM1

100 = HS of HB mapped on PWM2

101 = HS of HB mapped on PWM3

110 = 111 = No Mapped

HB_PWM4 [1]

HB_PWM4 [0]

HB_MODE4 [1]

HB4 functionality mode

00 = LS and HS of the HB1 are kept off

01 = LS of the HB1 is ON (static, no PWM), HS of the HB1 is OFF

10 = HS of the half bridge 1 is ON (static, no PWM), LS of the half bridge is OFF

11 = LS or HS of the half-bridge is ON according to the HB_PWM1 register

HB_MODE4 [0]

HB_WHEEL4 [1] HB4 free-wheeling mode

00 = 11 = No mapping

01 = Active free-wheeling on HS of the HB

10 = Active free-wheeling on LS of the HB

HB_WHEEL4 [0]

Table 151. HB4_DRIVER_CFG (0x1D) MSB

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

0 (RO)

0 (RW)

RES

VSTEP2_CONF4

[1]

VSTEP2_CONF4

[0]

ISTEP3_CONF4

[3]

ISTEP3_CONF4

[2]

ISTEP3_CONF4

[1]

ISTEP3_CONF4

[0]

Reserved

HB4 Vstep1 and

Vstep2 conf [1]

HB4 Vstep1 and

Vstep2 conf [0]

HB4 Istep3 conf

[3]

HB4 Istep3 conf

[2]

HB4 Istep3 conf

[1]

HB4 Istep3 conf

[0]

Table 152. HB4_DRIVER_CFG (0x1D) MSB description

Bit

Name

Description

RES

Reserved bit

VSTEP2_CONF4 [1]

Vstep1 and Vstep2 thresholds configuration of the HB4

These two bits set the Vstep1 and Vstep2 thresholds of the HB4

00 = Vstep1 = 1.1 V, Vstep2 = 2.67 V for the switch ON

00 = Vstep1 = 1.3 V, Vstep2 = 3.33 V for the switch OFF

01 = Vstep1 = 1.1 V, Vstep2 = 3.56 V for the switch ON

01 = Vstep1 = 1.3 V, Vstep2 = 4.44 V for the switch OFF

10 = Vstep1 = 2.2 V, Vstep2 = 4.45 V for the switch ON

10 = Vstep1 = 2.6 V, Vstep2 = 5.55 V for the switch OFF

11 = Vstep1 = 2.2 V, Vstep2 = 5.34 V for the switch ON

11 = Vstep1 = 2.6 V, Vstep2 = 6.66 V for the switch OFF

VSTEP2_CONF4 [0]

ISTEP3_CONF4 [3]

Istep3 configuration of the HB4

0000 = 2 mA

0001 = 4 mA

0010 = 8 mA

ISTEP3_CONF4 [2]

ISTEP3_CONF4 [1]

ISTEP3_CONF4 [0]

L99MH98

SPI Registers

DS14611 - Rev 3

page 98/147

L99MH98 Fiches technique(PDF) 98 Page - STMicroelectronics

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