參數(shù)資料
型號(hào): MC9S12DJ128
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: 16 bit Microcontroller Unit (MCU)(16位MCU)
中文描述: 16位微控制器單元(MCU)(16位微控制器)
文件頁數(shù): 121/142頁
文件大?。?/td> 6464K
代理商: MC9S12DJ128
Device User Guide — 9S12DT128DGV2/D V02.15
121
Freescale Semiconductor
Clock Monitor Failure is asserted if the frequency of the incoming clock signal is below the Assert
Frequency f
CMFA.
Table A-15 Oscillator Characteristics
A.5.3 Phase Locked Loop
The oscillator provides the reference clock for the PLL. The PLL′s Voltage Controlled Oscillator (VCO)
is also the system clock source in self clock mode.
A.5.3.1 XFC Component Selection
This section describes the selection of the XFC components to achieve a good filter 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)
f
OSC
0.5
16
MHz
1b
C Crystal oscillator range (Pierce)
1
NOTES
:
1. Depending on the crystal a damping series resistor might be necessary
2. f
osc
= 4MHz, C = 22pF.
3. Maximum value is for extreme cases using high Q, low frequency crystals
4. XCLKS =0 during reset
f
OSC
0.5
40
MHz
2
P Startup Current
i
OSC
100
μ
A
3
C Oscillator start-up time (Colpitts)
t
UPOSC
8
2
100
3
ms
4
D Clock Quality check time-out
t
CQOUT
0.45
2.5
s
5
P Clock Monitor Failure Assert Frequency
f
CMFA
50
100
200
KHz
6
P External square wave input frequency
4
f
EXT
0.5
50
MHz
7
D External square wave pulse width low
t
EXTL
9.5
ns
8
D External square wave pulse width high
t
EXTH
9.5
ns
9
D External square wave rise time
t
EXTR
1
ns
10
D External square wave fall time
t
EXTF
1
ns
11
D Input Capacitance (EXTAL, XTAL pins)
C
IN
7
pF
12
C
DC Operating Bias in Colpitts Configuration on
EXTAL Pin
V
DCBIAS
1.1
V
13
P EXTAL Pin Input High Voltage
4
V
IH,EXTAL
0.75*V
DDPLL
V
T EXTAL Pin Input High Voltage
4
V
IH,EXTAL
V
DDPLL
+ 0.3
V
14
P EXTAL Pin Input Low Voltage
4
V
IL,EXTAL
0.25*V
DDPLL
V
T EXTAL Pin Input Low Voltage
4
V
IL,EXTAL
V
SSPLL
- 0.3
V
15
C EXTAL Pin Input Hysteresis
4
V
HYS,EXTAL
250
mV
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