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參數(shù)資料
| 型號(hào)： | UPD784054GCA1 |
| 廠商： | NEC Corp. |
| 英文描述： | 16-BIT SINGLE-CHIP MICROCONTROLLER |
| 中文描述： | 16位單片機(jī) |
| 文件頁(yè)數(shù)： | 61/86頁(yè) |
| 文件大小： | 579K |
| 代理商： | UPD784054GCA1 |
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μ
PD784054(A)
61
(2) Electrical specifications of
μ
PD784054(A1) (2/6)
Oscillation Circuit Characteristics (T
A
= –40 to +110 C, V
DD
= 4.5 to 5.5 V, V
SS
= 0 V)
Resonator
Recommended Circuit
Item
MIN.
MAX.
Unit
Ceramic resonator or
crystal resonator
Oscillation frequency (f
XX
)
8
20
MHz
External clock
X1 input frequency (f
X
)
8
20
MHz
X1 input rise, fall time
0
5
ns
X1 input high-, low-level
width
20
105
ns
Note
When the EXTC bit of the oscillation stabilization time specification register (OSTS) = 0. Input the reverse
phase clock of the pin X1 to the pin X2 when the EXTC bit = 1.
Caution
When using a system clock oscillation circuit, wire the portion enclosed by the dotted line in
the diagram above as follows to prevent adverse influence from wiring capacitance:
Keep the wiring length as short as possible.
Do not cross the wiring with any other signal lines. Do not route the wiring in the vicinity
of a line through which a high alternating current flows.
Always keep the ground potential for the capacitor in the oscillation circuit at the same
potential as V
SS
. Do not ground the capacitor to a ground pattern through which a high current
flows.
Do not extract any signal from the oscillation circuit.
C1
C2
V
SS
X1
X2
X1
X2
Open
Note
HCMOS inverter
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