ST72F521AR9TC View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST72F521AR9TC

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE

STMicroelectronics 

ST72521

16-BIT TIMER (Cont’d)

Figure 43. Counter Timing Diagram, internal clock divided by 2

CPU CLOCK

INTERNAL RESET

TIMER CLOCK

COUNTER REGISTER

TIMER OVERFLOW FLAG (TOF)

FFFD FFFE FFFF 0000 0001 0002 0003

Figure 44. Counter Timing Diagram, internal clock divided by 4

CPU CLOCK

INTERNAL RESET

TIMER CLOCK

COUNTER REGISTER FFFC

FFFD

TIMER OVERFLOW FLAG (TOF)

0000

0001

Figure 45. Counter Timing Diagram, internal clock divided by 8

CPU CLOCK

INTERNAL RESET

TIMER CLOCK

COUNTER REGISTER

FFFC

FFFD

0000

TIMER OVERFLOW FLAG (TOF)

Note: The MCU is in reset state when the internal reset signal is high, when it is low the MCU is running.

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