L9803 STMicroelectronics, L9803 Datasheet - Page 99

• Manufacturer Part Number: L9803
• Description: Super Smart Power Motor Driver With 8-bit Mcu, Ram, Eeprom, Adc, Wdg, Timers, Pwm And H-bridge Driver
• Manufacturer: STMicroelectronics

L9803
5.8.6
Figure 46. Example - Power Bridge Waveform, PWM Up Brake Driving Mode
Register Description
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
Bit 0 = EN: Power Bridge enable. When 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.
PIE
7
OVT
OUTR
OUTL
PWM1
DIR
UR
DR
UL
DL
SC
DIR
IN2
IN1
On-Chip Peripherals
PWM_EN
EN
0
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