參數(shù)資料
型號: ST72F324B
廠商: 意法半導(dǎo)體
英文描述: 5V Range 8-Bit MCU With 8 TO 32K FLASH/ROM, 10-Bit ADC, 4 Timers, SPI, SCI Interface(具有ICP,IAP,Nested Interrupt,TLI,ROP的8位MCU)
中文描述: 5V范圍內(nèi)的8位8到32K閃存/ ROM,10位ADC,4個計時器,SPI和SCI接口(具有比較方案,國際檢察官聯(lián)合會,嵌套中斷,中華語文研習(xí)所,人事登記的8位微控制器)
文件頁數(shù): 128/167頁
文件大?。?/td> 1641K
代理商: ST72F324B
ST72324B
128/167
1
CLOCK CHARACTERISTICS
(Cont’d)
12.6.5 PLL Characteristics
Note:
1. Data characterized but not tested.
The user must take the PLL jitter into account in the application (for example in serial communication or
sampling of high frequency signals). The PLL jitter is a periodic effect, which is integrated over several
CPU cycles. Therefore the longer the period of the application signal, the less it will be impacted by the
PLL jitter.
Figure 65
shows the PLL jitter integrated on application signals in the range 125kHz to 2MHz. At frequen-
cies of less than 125KHz, the jitter is negligible.
Figure 65. Integrated PLL Jitter vs signal frequency
1
Note 1:
Measurement conditions: f
CPU
= 8MHz.
Symbol
f
OSC
f
CPU
/
f
CPU
Parameter
Conditions
Min
2
Typ
Max
4
2
Unit
MHz
%
PLL input frequency range
Instantaneous PLL jitter
1)
f
OSC
= 4 MHz.
0.7
0
0.2
0.4
0.6
0.8
1
1.2
4 MHz
2 MHz
1 MHz
500 kHz 250 kHz 125 kHz
Application Frequency
+/-Jitter (%)
Max
Typ
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