AT89C51CC03C-RLTIM 查看數據表（PDF） - Atmel Corporation

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AT89C51CC03C-RLTIM

Enhanced 8-bit MCU with CAN Controller and Flash Memory

Atmel Corporation 

Figure 15. Power Fail Detect

Vcc

AT89C51CC03

t

Reset

Vcc

When the power is applied, the Power Monitor immediately asserts a reset. Once the

internal supply after the voltage regulator reach a safety level, the power monitor then

looks at the XTAL clock input. The internal reset will remain asserted until the Xtal1 lev-

els are above and below VIH and VIL. Further more. An internal counter will count 1024

clock periods before the reset is de-asserted.

If the internal power supply falls below a safety level, a reset is immediately asserted.

.

31

4182K–CAN–05/06

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