參數(shù)資料
型號(hào)： UPD78F0536GC-UBS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP64
封裝： 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64
文件頁(yè)數(shù)： 3/28頁(yè)
文件大?。?/td> 190K
代理商： UPD78F0536GC-UBS
NEC Electronics Corporation 2004
78K0/KE2
ZUD-CC-0128-E
Data Published Oct 2004 N CP(K)
High-Speed System Clock (Crystal/Ceramic) Oscillator Characteristics
(TA = -40 to +85
°C, 1.8 V ≤ VDD = EVDD ≤ 5.5 V, 2.3 V ≤ AVREF ≤ VDD= EVDD, VSS = EVSS = AVSS = 0 V)
Resonator
Recommended
Circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
4.0 V
≤ VDD ≤ 5.5 V
2.0
20.0
2.7 V
≤ VDD < 4.0 V
2.0
10.0
Ceramic
resonator
C1
X2
X1
VSS
C2
Oscillation
frequency(fXH)
Note
1.8 V
≤ VDD < 2.7 V
2.0
5.0
MHz
4.0 V
≤ VDD ≤ 5.5 V
2.0
20.0
2.7 V
≤ VDD < 4.0 V
2.0
10.0
Crystal resonator
Oscillation
frequency(fXH)
Note
1.8 V
≤ VDD < 2.7 V
2.0
5.0
MHz
Note Indicates only oscillator characteristics.
Refer to AC Characteristics for instruction execution
time.
Cautions 1.
When using the high-speed system clock oscillator, wire as follows in the area enclosed
by the broken lines in the above figures to avoid an adverse effect from wiring
capacitance.
Keep the wiring length as short as possible.
Do not cross the wiring with the other signal lines.
Do not route the wiring near a signal line through which a high fluctuating current flows.
Always make the ground point of the oscillator capacitor the same potential as VSS.
Do not ground the capacitor to a ground pattern through which a high current flows.
Do not fetch signals from the oscillator.
2.
Since the CPU is started by the Ring-OSC after reset is released, check the oscillation
stabilization time of the high-speed system clock using the oscillation stabilization time
status register (OSTC).
Determine the oscillation stabilization time of the OSTC register
and oscillation stabilization time select register (OSTS) after sufficiently evaluating the
oscillation stabilization time with the resonator to be used.
Remark
For the resonator selection and oscillator constant, customers are requested to either
evaluate the oscillation themselves or apply to the resonator manufacturer for evaluation.
C1
X2
X1
C2
VSS
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