ST72E121J4D0 查看數據表（PDF） - STMicroelectronics

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ST72E121J4D0

8-BIT MCU WITH 8 TO 16K OTP/EPROM, 384 TO 512 BYTES RAM, WDG, SCI, SPI AND 2 TIMERS

STMicroelectronics 

ST72E121 ST72T121

16-BIT TIMER (Cont’d)

Figure 22. Counter Timing Diagram, internal clock divided by 2

CPU CLOCK

INTERNAL RESET

TIMER CLOCK

COUNTER REGISTER

OVERFLOW FLAG TOF

FFFD FFFE FFFF 0000 0001 0002 0003

Figure 23. Counter Timing Diagram, internal clock divided by 4

CPU CLOCK

INTERNAL RESET

TIMER CLOCK

COUNTER REGISTER FFFC

FFF D

OVERFLOW FLAG TOF

0000

0001

Figure 24. Counter Timing Diagram, internal clock divided by 8

CPU CLOCK

INTERNAL RESET

TIMER CLOCK

COUNTER REGISTER

OVERFLOW FLAG TOF

FFFC

FFFD

0000

36/92

36

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