L9803 STMicroelectronics, L9803 Datasheet - Page 43

• 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
The timer clock depends on the clock control bits of the CR2 register, as illustrated in
Table 9: Clock Control
or 524288 CPU clock cycles depending on the CC[1:0] bits.
The timer frequency can be f
Figure 19. Timer Block Diagram
EXCLK
CPU CLOCK
CC1 CC0
TIMER INTERRUPT
1/2
1/4
1/8
ICIE
EXEDG
ICF1
8 high
OCIE TOIE
OCF1 TOF
FREE RUNNING
OVERFLOW
ALTERNATE
REGISTER
DETECT
CIRCUIT
COUNTER
COUNTER
16 BIT
Bits. The value in the counter register repeats every 131072, 262144
FOLV2
buffer
ICF2
8-bit
8 low
16
FOLV1
OCF2
CPU
16
/2, f
OLVL2
SR
0
OUTPUT COMPARE
REGISTER
COMPARE
OUTPUT
CPU
MCU-PERIPHERAL INTERFACE
8
IEDG1
0
CR1
/4, f
CIRCUIT
1
ST7 INTERNAL BUS
16
0
8
TIMER INTERNAL BUS
CPU
OLVL1
/8 or an external frequency.
6
COMPARE
REGISTER
OUTPUT
8
2
OC1E
16
8
OC2E OPM
REGISTER
CAPTURE
INPUT
8
1
EDGE DETECT
EDGE DETECT
PWM
8
CIRCUIT1
CIRCUIT2
16
REGISTER
CAPTURE
CC1
LATCH1
LATCH2
INPUT
8
2
On-Chip Peripherals
CC0
8
CR2
16
IEDG2
EXEDG
OCMP1
OCMP2
ICAP1
ICAP2
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