參數(shù)資料
型號(hào): UPD78322GJ-XXX-5BJ
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP74
封裝: 20 X 20 MM, PLASTIC, QFP-74
文件頁(yè)數(shù): 30/90頁(yè)
文件大?。?/td> 649K
代理商: UPD78322GJ-XXX-5BJ
34
PD78320, 78322
(b) External clock
(i) When the inverted phase of an external clock
(ii) When X2 pin is left open
to be input to the X1 pin is input to the X2 pin
Cautions 1. When the system clock oscillator is used, the following points should be noted concerning wiring
within broken lines shown in Figure 3-2, in order to prevent the effects of wiring capacitance, etc.
Keep the wiring as short as possible.
Do not cross any other signal lines, and keep clear of lines in which a high fluctuating current flows.
Ensure that oscillator capacitor connection points are always at the same potential as VSS.
Do not ground in a ground pattern in which a high current flows.
Do not take a signal from the oscillator.
2. When an external clock is input to the X1 pin and the X2 pin is left open, ensure that no loads such
as wiring capacitance are connected to the X2 pin.
Figure 3-2. Externally-Mounted System Clock Oscillator
(a) Crystal oscillator
X2
X1
VSS
PD78322
X1
X2
PD78322
External
Clock
X1
X2
PD78322
External
Clock
Open
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