參數(shù)資料
型號(hào)： UPD789132GS-XXX
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, MICROCONTROLLER, PDSO30
封裝： 0.300 INCH, SHRINK, PLASTIC, SOP-30
文件頁(yè)數(shù)： 27/54頁(yè)
文件大?。?/td> 481K
代理商： UPD789132GS-XXX
Data Sheet U13025EJ2V0DS00
31
PD789121, 789122, 789124, 789131, 789132, 789134
System Clock Oscillator Characteristics
(TA = –40 to +85
°°°°C, VDD = 2.7 to 5.5 V)
Resonator
Recommended
Circuit
Parameter
Conditions
MIN.
TYP.
MAX.
Unit
Ceramic
resonator
CL2
CL1
Oscillation frequency (fCC)
Note
2.0
4.0
MHz
CL1 input frequency (fCC)
Note
1.0
5.0
MHz
External
clock
CL1
CL2
OPEN
CL1 input high-/low-level
width (tXH, tXL)
85
500
ns
Note
Indicates only oscillator characteristics. Refer to AC characteristics for instruction execution time.
Caution
When using the 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.
RC Oscillator Frequency Characteristics (TA = –40 to +85
°°°°C, VDD = 2.7 to 5.5 V)
Parameter
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
fCC1
R = 11.0 k
, C = 22 pF
1.5
2.0
2.5
MHz
f CC2
R = 6.8 k
, C = 22 pF
2.5
3.0
3.5
MHz
Oscillator frequency
f CC3
R = 4.7 k
, C = 22 pF
3.5
4.0
4.7
MHz
Remark
So that the TYP. spec. is satisfied between 2.0 to 4.0 MHz, set one of the above three patterns for R
and C.
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