參數(shù)資料
型號(hào): μPD784217Y
廠商: NEC Corp.
英文描述: 8 /16 Bit Single Chip Microcontrollers(8/16位單片微控制器)
中文描述: 8 / 16位單片機(jī)微控制器(8 / 16位單片微控制器)
文件頁數(shù): 28/50頁
文件大小: 207K
代理商: ΜPD784217Y
33
μ
PD784217Y,784218Y
Figure 8-3. Example of Using Main System Clock Oscillation Circuit
Figure 8-4. Example of Using Subsystem Clock Oscillation Circuit
32.768
kHz
V
SS
XT2
XT1
XT2
XT1
External
clock
PD74HCU04
μ
(1) Crystal oscillation
(2) External clock
Caution
When using the main system clock and subsystem clock oscillation circuits, wire the dotted
portions in Figures 8-3 and 8-4 as follows to avoid adverse influence from wiring capacitance.
Keep the wiring length as short as possible.
Do not cross the wiring with other signal lines.
Do not route the wiring in the vicinity of lines through which a high alternating current flows.
Always keep the potential at the ground point of the capacitor in the oscillation circuit the same
as V
SS
. Do not ground to a ground pattern through which a high current flows.
Do not extract signals from the oscillation circuit.
Note that the subsystem clock oscillation circuit has a low amplification factor to reduce the
current consumption.
External
clock
X2
X1
PD74HCU04
μ
V
SS
X2
X1
Crystal resonator
or
ceramic resonator
(1) Crystal/ceramic oscillation
(2) External clock
相關(guān)PDF資料
PDF描述
μPD784218Y 8 /16 Bit Single Chip Microcontrollers(8/16位單片微控制器)
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