L9803 STMicroelectronics, L9803 Datasheet - Page 98

• 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

On-Chip Peripherals
Table 14.
Note:
98/126
Drive EN PWM_EN DIR PWM1 IN1 IN2
1
1
1
1
1
1
1
1
1
1
Functional Description Table (continued)
The DIR signal is internally synchronized with the PWM1 and PWM2 signals according to
the selected Driving Mode. After writing the DIR bit in BCSR register, the direction changes
in correspondence with the first rising edge of PWM1. The same procedure is used in the
case of PWM2. This allows the proper control of the direction changes. When the PWM
signal is 0% or 100%, being no edges available, the DIR bit can’t be latched and the
direction does not change until a PWM edge occurs.
1
1
1
1
1
1
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
pwm1 pwm1 pwm2 pwm2
pwm1 pwm1 pwm2 pwm2
UL
0
1
0
0
0
1
1
0
DL
1
0
1
1
1
0
0
1
UR
0
0
0
1
1
0
0
1
DR
1
1
1
0
0
1
1
0
PWM2->right
PWM2->right
PWM1 ->left
PWM1 ->left
FORWARD
FORWARD
FORWARD
Operation Configuration
BRAKE
BRAKE
BACK
BACK
BACK
Full Bridge
Full Bridge
Full Bridge
Full Bridge
Full Bridge
Full Bridge
Full Bridge
Full Bridge
Two Half
Two Half
Bridges
Bridges
L9803