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 27. Output Compare Block Diagram

16 BIT FREE RUNNING

COUNTER

16-bit

OUTPUT COMPARE

CIRCUIT

16-bit

16-bit

OC1R Register

OC2R Register

OC1E OC2E

OCIE

OCF1

CC1 CC0

(Control Register 2) CR2

(Control Register 1) CR1

OLVL2

OLVL1

OCF2 0

0

0

(Status Register) SR

Latch

1

Latch

2

Figure 28. Output Compare Timing Diagram, Internal Clock Divided by 2

INTERNAL CPU CLOCK

TIMER CLOCK

COUNTER 2ECF 2ED0 2ED1 2ED2 2ED3 2ED4

OUTPUT COMPARE REGISTER

2ED3

OUTPUT COMPARE FLAG (OCFi)

OCMPi PIN (OLVLi=1)

Figure 29. Output Compare Timing Diagram, Internal Clock Divided by 4

INTERNAL CPU CLOCK

TIMER CLOCK

COUNTER 2ECF 2ED0 2ED1 2ED2 2ED3 2ED4

OUTPUT COMPARE REGISTER

2ED3

COMPARE REGISTER LATCH

OCFi AND OCMPi PIN (OLVLi=1)

OCMP1

Pin

OCMP2

Pin

40/92

40

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