S3C8245/P8245/C8249/P8249 ELECTRICAL DATA
19-15
Table 19-14. Sub Oscillator(crystal) Stabilization Time (tST2)
(TA = 25 °C)
Oscillator Test Condition Min Typ Max Unit
Crystal Normal
mode VDD=4.5V to 5.5V –12sec
VDD=2.0V to 4.5V 10 sec
Crystal Strong
mode VDD=3.0V to 5.5V ––6sec
VDD=2.0V to 3.0V ––2sec
External clock VDD=2.0V to 5.5V
XTIN input high and low level width(tXTH, tXTL)
5 – 15 µs
NOTE: Oscillation stabilization time (tST2) is the time required for the oscillator to it’s normal oscillation when stop mode
is released by interrupts.
10 MHz
f
CPU
3 MHz
1 MHz
1234567
Supply Voltage (V)
Minimum instruction clock = 1/4 x oscillator frequency
5.5
8 MHz
2.71.8
A
B
Figure 19-8. Operating Voltage Range