L9803 STMicroelectronics, L9803 Datasheet - Page 66

• 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
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Table 11.
Figure 31. PWM Block Diagram
Prescaler (PS)
clock
MSB
7
| . | . | . | ps1 | ps2 | ps3 | en_int | en_pwm |
PWM Timing (f
0
1
2
3
4
5
6
7
T
3
1/f
1/f
1/f
1/f
1/f
1/f
1/f
1/f
internal clock
in
in
in
in
in
in
in
in
conreg
* 2
* 2
* 2
* 2
* 2
* 2
* 2
* 2
7
6
5
4
3
2
1
ps
ps
ps
ps
ps
ps
ps
ps
CPU
= 8MHz)
1/f
1/f
1/f
1/f
1/f
1/f
1/f
1/f
M
U
X
in
in
in
in
in
in
in
in
CYREG @16 bit Resolution
* 2
* 2
* 2
* 2
* 2
* 2
* 2
* 2
2
ps
ps
ps
ps
ps
ps
ps
ps
data bus
* 1.....1/f
* 1.....1/f
* 1.....1/f
* 1.....1/f
* 1.....1/f
* 1.....1/f
* 1.....1/f
* 1.....1/f
counter
16-bit
COMPARATOR1
dutyreg
in
in
in
in
in
in
in
in
COMPARATOR2
* 2
* 2
* 2
* 2
* 2
* 2
* 2
* 2
16
ps
ps
ps
ps
ps
ps
ps
ps
* 65535
* 65535
* 65535
* 65535
* 65535
* 65535
* 65535
* 65535
logic
16
0.125 µs..... ~8192 µs
0.25 µs....... ~16384 µs
0.5 µs......... ~32768 µs
1 µs............ 65535 µs
2 µs............ 131070 µs
4 µs............ 262140 µs
8 µs............ 524280 µs
16 µs.......... 1048560 µs
cyreg
PWM
cycle
@ f
PWM
in
IRQ
=8MHz
LSB
L9803
0