L9805E datasheet(98/125 Pages) STMICROELECTRONICS

Part #	L9805E

Description	Super smart power motor driver with 8-Bit MCU, RAM, EEPROM, ADC, WDG, Timers, PWM and H-bridge driver

PDF	125 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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98 / 125 page

On-chip peripherals

L9805E

98/125

Figure 49.

Example - power bridge waveform, PWM up brake driving mode

5.8.6

The power section is controlled by the microcontroller through the following register:

POWER BRIDGE CONTROL STATUS REGISTER (PBCSR)

Address: 0021h - Read/Write

Reset Value: 00000000 (00h)

Bit 0 = EN: Power Bridge enable. On reset the bridge is disabled and OUTL and OUTR are

in high impedance condition.

Bit 1= PWM_EN: PWM driving enable. When reset the bridge is driven directly by IN1 and

IN2 bit (Direct Mode). When set the driving is made by PWM1 and/or PWM2 bit according to

the Operation Mode selected by IN1 and IN2 bit.

Bit 2= IN1: Left Half Bridge control bit if PWM_EN=0, driving mode selection bit if

PWM_EN=1.

Bit 3= IN2: Right Half Bridge control bit if PWM_EN=0, driving mode selection bit if

PWM_EN=1.

PWM1

DIR

OUTL

OUTR

PIE

OVT

DIR

IN2

IN1

PWM_EN

L9805E Datasheet(PDF) 98 Page - STMicroelectronics