MB90387 datasheet(63/82 Pages) CYPRESS

63 / 82 page

Document Number: 002-07765 Rev. *A

Page 62 of 81

MB90387/387S/F387/F387S

MB90V495G

Rating values of alternating current is defined by the measurement reference voltage values shown below:

13.4.2 Reset Input Timing

*1: Oscillation time of oscillator is time that the amplitude reached the 90%. In the crystal oscillator, the oscillation time is between

several ms to tens of ms. In ceramic oscillator, the oscillation time is between hundreds of

s to several ms. In the external clock,

the oscillation time is 0 ms.

*2: Except for MB90F387S and MB90387S.

*3: Refer to "(1) Clock timing" ratings for tCP (internal operation clock cycle time).

Parameter

Symbol Pin Name

Value

Unit

Remarks

Min

Max

Reset input time

tRSTL

RST

16 tCP



Normal operation

Oscillation time of oscillator

*1 +

100

s + 16 tCP*3



In sub clock*2, sub

sleep*2, watch*2 and

stop mode

100

s

In timebase timer

0.8 VCC

0.2 VCC

2.4 V

0.8 V

Hysteresis input pin

 Output signal waveform

Output pin

 Input signal waveform

tRSTL

0.2 VCC

100 s

+ 16 tCP

RST

 In sub clock, sub sleep, watch and stop mode

Internal operation

clock

Internal reset

Oscillation

time of

oscillator

Wait time for stabilizing

oscillation

Execute instruction

90% of

amplitude

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