参数资料
型号: S3P8454-TW
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 25 MHz, MICROCONTROLLER, PQFP80
封装: 12 X 12 MM, TQFP-80
文件页数: 15/32页
文件大小: 206K
代理商: S3P8454-TW
ELECTRICAL DATA
S3C8454/P8454
18-10
Table 18-8. Main Oscillator Frequency (f
OSC1)
(T
A = – 40
°C + 85 °C, V
DD = 4.5 V to 5.5 V)
Oscillator
Clock Circuit
Test Condition
Min
Typ
Max
Unit
Crystal
XIN
C1
C2
XOUT
CPU clock oscillation
frequency
4
25
MHz
Ceramic
XIN
C1
C2
XOUT
CPU clock oscillation
frequency
4
25
MHz
External clock
XIN
XOUT
XIN input frequency
4
25
MHz
Table 18-9. Main Oscillator Clock Stabilization Time (t
ST1)
(T
A = -40
°C + 85 °C, V
DD = 4.5 V to 5.5 V)
Oscillator
Test Condition
Min
Typ
Max
Unit
Crystal
V
DD = 4.5 V to 5.5 V
10
ms
Ceramic
Stabilization occurs when V
DD is equal to the minimum
oscillator voltage range.
4
ms
External clock
X
IN input high and low level width (tXH, tXL)
50
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.
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