Samsung S3C84E5 Main Oscillator Frequency fOSC1, Main Oscillator Clock Stabilization Time tST1

Models: S3C84E5

1 316
Download 316 pages 61.65 Kb
Page 295
Image 295

ELECTRICAL DATAS3C84E5/C84E9/P84E9

 

 

 

 

 

 

 

 

 

 

Table 17-5. Main Oscillator Frequency (fOSC1)

 

 

 

(TA = – 25 °C + 85 °C, VDD = VLVR

to 5.5 V)

 

 

 

 

 

Oscillator

 

 

Clock Circuit

 

Test Condition

Min

Typ.

Max

Unit

Main crystal or

 

 

XIN

XOUT

 

 

 

VDD = VLVR

to 5.5 V

1

12

MHz

 

 

 

ceramic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C1

 

 

 

 

C2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External clock

 

 

 

 

XIN

 

XOUT

 

 

VDD = VLVR

to 5.5 V

1

12

 

 

 

 

 

 

 

(main system)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 17-6. Main Oscillator Clock Stabilization Time (tST1)

(TA = – 25 °C + 85 °C, VDD = VLVR to 5.5 V)

Oscillator

 

 

Test Condition

Min

Typ.

Max

Unit

Main crystal

fOSC > 400 kHz;

10

ms

 

Oscillation stabilization occurs when VDD is equal

 

 

 

 

 

to the minimum oscillator voltage range.

 

 

 

 

Main ceramic

 

 

 

4

 

External clock

XIN input High and Low width (tXH, tXL)

50

ns

(main system)

 

 

 

 

 

 

 

Oscillator

t

WAIT

when released by a reset (1)

216/f

sec

stabilization

 

 

 

OSC

 

 

 

 

 

 

 

 

 

wait time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tWAIT when released by an interrupt (2)

sec

NOTES:

1.fOSC is the oscillator frequency.

2.The duration of the oscillator stabilization wait time, tWAIT, when it is released by an interrupt is determined by the settings in the basic timer control register, BTCON.

17-6

Page 295
Image 295
Samsung S3C84E5 user manual Main Oscillator Frequency fOSC1, Main Oscillator Clock Stabilization Time tST1