參數(shù)資料
型號(hào): S3C8444XX-TW
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 18 MHz, MICROCONTROLLER, PQFP80
封裝: 12 X 12 MM, TQFP-80
文件頁數(shù): 22/44頁
文件大?。?/td> 301K
代理商: S3C8444XX-TW
S3C8444
ELECTRICAL DATA
16–13
Table 16–11. Main Oscillator Clock Stabilization Time (tST1)
(TA = – 20°C + 85°C, VDD = 4.5 V to 6.0 V)
Oscillator
Test Condition
Min
Typ
Max
Unit
Crystal
VDD = 4.5 V to 6.0 V
20
ms
Ceramic
Stabilization occurs when VDD is equal to the minimum
oscillator voltage range.
10
ms
External clock
XIN input high and low level width (tXH, tXL)
25
500
ns
NOTE: Oscillation stabilization time (tST1) is the time required for the CPU clock to return to its normal oscillation
frequency after a power-on occurs, or when Stop mode is ended by a
RESET signal. The RESET should therefore
be held at low level until the tST1 time has elapsed (see Figure 15–3).
XIN
tXL
tXH
1 /
fOSC1
VDD – 0.5 V
0.4
V
Figure 16–8. Clock Timing Measurement at XIN
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