L99MH98 datasheet(79/147 Pages) STMICROELECTRONICS

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Table 102. HB1_MODE_CONFIG (0x10) LSB description

Bit

Name

Description

HB_IDIAG1 [0]

Half bridge 1 diagnostic currents setting

00 = Pull-up and pull-down currents off

01 = Pull-up current off and pull-down current on

10 = Pull-up current on and pull-down current off

11 = Pull-up and pull-down currents off

HB_PWM1 [2]

PWM mapping on HB1

This 3 bits register is used to indicate which PWM signal is applied to the HS or LS of the half-bridge 1

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_PWM1 [1]

HB_PWM1 [0]

HB_MODE1 [1] HB1 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_MODE1 [0]

HB_WHEEL1 [1] HB1 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_WHEEL1 [0]

Table 103. HB1_DRIVER_CFG (0x11) MSB

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

0 (RO)

0 (RW)

RES

VSTEP2_CONF1

[1]

VSTEP2_CONF1

[0]

ISTEP3_CONF1

[3]

ISTEP3_CONF1

[2]

ISTEP3_CONF1

[1]

ISTEP3_CONF1

[0]

Reserved

HB1 Vstep1 and

Vstep2 conf [1]

HB1 Vstep1 and

Vstep2 conf [0]

HB1 Istep3 conf

[3]

HB1 Istep3 conf

[2]

HB1 Istep3 conf

[1]

HB1 Istep3 conf

[0]

Table 104. HB1_DRIVER_CFG (0x11) MSB description

Bit

Name

Description

RES

Reserved bit

VSTEP2_CONF1 [1]

Vstep1 and Vstep2 thresholds configuration of the HB1

These two bits set the Vstep1 and Vstep2 thresholds of the HB1

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

VSTEP2_CONF1 [0]

L99MH98

SPI Registers

DS14611 - Rev 3

page 79/147

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