L8229 datasheet(25/42 Pages) STMICROELECTRONICS

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Obsolete

Product(s)

- Obsolete

Product(s)

L8229

L8229_0 and L8229_1 modes

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8.3

W1 (PARAMETERS: Bit 2=0, Bit 1=1)

This word is mainly used to set motor related parameters.

DAC2 BIT 2

BIT2 for DAC intended to regulate the current of Bridge 2

DAC2 BIT 3

BIT3 for DAC intended to regulate the current of Bridge 2

DAC2 BIT 4

BIT4 for DAC intended to regulate the current of Bridge 2

DAC2 BIT 5 (MSB)

MSB for DAC intended to regulate the current of Bridge 2

PHASE 2

Controls the direction of current flow Bridge 2.

A logic HIGH level causes current flow from A (source) to B (sink).

PARALLEL OUTPUT

This bit must be set to 1 when otputs are paralled to drive a single DC

motor

Table 19.

W0 (continued)

BIT #

NAME

RESET

VALUE

DESCRIPTION

Table 20.

BIT #

NAME

RESET

VALUE

DESCRIPTION

CHIP ADDRESS

This bit is used to select if the informations provided by bits 1 to 15 are

referred to chip 0 or chip 1. This is useful in the case that two L8229 are

present on the same board and a single nCS line is used.

WORD ADDRESS 1

This is the LSB of the two bits used to address the word.

WORD ADDRESS 2

This is the MSB of the two bits used to address the word.

NSLEEP

This bit is used to decide if the device should exit sleep mode.

OFF1

LSB for fixing the Toff time (see following Table 32).

OFF2

BIT 2 for fixing the Toff time (see following Table 32).

OFF3

BIT 3 for fixing the Toff time (see following Table 32).

OFF4

BIT 4 for fixing the Toff time (see following Table 32).

OFF5

MSB for fixing the Toff time (see following Table 32).

FASTDEC1

LSB for fixing the Fast Decay time (see followingTable 31).

FASTDEC2

BIT 2 for fixing the Fast Decay time (see following Table 31).

FASTDEC3

BIT 3 for fixing the Fast Decay time (see following Table 31).

FASTDEC4

MSB for fixing the Fast Decay time (see following Table 31).

SYNCRECT1

LSB to decide the rectification mode (see following Table 35).

SYNCRECT2

MSB to decide the rectification mode (see following Table 35).

Brake

This bit is used to put outputs in brake mode

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