参数资料
型号: MC9S12C32CFU25
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封装: QFP-80
文件页数: 15/136页
文件大小: 2022K
代理商: MC9S12C32CFU25
Device User Guide — 9S12C128DGV1/D V01.05
111
time tUPOSC. The device features a clock monitor. A time-out is asserted if the frequency of the incoming
clock signal is below the Clock Monitor FailureAssert Frequency fCMFA.
B.6.3 Phase Locked Loop
The oscillator provides the reference clock for the PLL. The PLLs Voltage Controlled Oscillator (VCO)
is also the system clock source in self clock mode.
B.6.3.1 XFC Component Selection
This section describes the selection of the XFC components to achieve a good filter characteristics.
Table B-11 Oscillator Characteristics
Conditions are shown in Table A-4 unless otherwise noted
Num
C
Rating
Symbol
Min
Typ
Max
Unit
1a
C
Crystal oscillator range (Colpitts)
fOSC
0.5
16
MHz
1b
C
Crystal oscillator range (Pierce) 1(4)
NOTES:
1. Depending on the crystal a damping series resistor might be necessary
fOSC
0.5
40
MHz
2
P
Startup Current
iOSC
100
A
3
C
Oscillator start-up time (Colpitts)
tUPOSC
82
2. fosc = 4MHz, C = 22pF.
1003
3. Maximum value is for extreme cases using high Q, low frequency crystals
ms
4
D
Clock Quality check time-out
tCQOUT
0.45
2.5
s
5
P
Clock Monitor Failure Assert Frequency
fCMFA
50
100
200
KHz
6P
External square wave input frequency 4
4. XCLKS =0 during reset
fEXT
0.5
50
MHz
7
D
External square wave pulse width low
tEXTL
9.5
ns
8
D
External square wave pulse width high
tEXTH
9.5
ns
9
D
External square wave rise time
tEXTR
1ns
10
D
External square wave fall time
tEXTF
1ns
11
D
Input Capacitance (EXTAL, XTAL pins)
CIN
7pF
12
C
DC Operating Bias in Colpitts Conguration
on EXTAL Pin
VDCBIAS
1.1
V
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