參數(shù)資料
型號： UPD17201AGF
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
中文描述： 4位單片機(jī)與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì)
文件頁數(shù)： 101/120頁
文件大?。?/td> 516K
代理商： UPD17201AGF
μ
PD17201A, 17207
101
MAIN SYSTEM CLOCK OSCILLATOR CHARACTERISTICS
(T
A
= –20 to +75
°
C, V
DD
= 2.2 to 5.5 V)
Resonator
Constants
Recommended
Item
Conditions
MIN.
TYP.
MAX.
Unit
1.0
4
8.0
MHz
From when V
DD
reaches
the minimum oscillation
voltage
4
ms
1.0
4
8.0
MHz
V
DD
= 4.5 to 5.5V
10
ms
30
ms
Notes 1.
The oscillation frequency is indicated only to express the oscillator characteristics.
The oscillation stabilization time is the time required for stabilizing the oscillation after V
DD
is applied or
the STOP mode is released.
The recommended oscillators are shown in the table described later.
2.
3.
SUBSYSTEM CLOCK OSCILLATOR CHARACTERISTICS
Resonator
Constants
Recommended
Item
Conditions
MIN.
TYP.
MAX.
Unit
32.768
kHz
5
10
s
Caution When using the main system clock and the subsystem clock generators, in order to avoid wiring
capacitance effects, the following notations must be read and observed for wiring the portion inside
the dotted line in the table:
Wiring length must be minimized.
Do not cross with other signal lines. Do not wire close to a large current line.
Capacitors used in the oscillators must always be grounded to GND potential level. Never ground
the grounding pattern having a large current flow.
Do not take the signal directly out of the oscillator.
In order to reduce the power consumption, the subsystem clock oscillator employs a low amplification
factor circuit. Because of this, the subsystem clock oscillator is more sensitive to noise than the
main system clock oscillator. Therefore, when using the subsystem clock, wiring must be carefully
planned.
Ceramic
Note 3
oscillator
Crystal
Note 3
oscillator
Oscillation frequency
(fX)
Note 1
Oscillation stabilization
time
Note 2
Oscillation frequency
(f
X
)
Note 1
Oscillation stabilization
time
Note 2
Crystal
oscillator
Oscillation stabilization
time
Oscillation frequency
(f
XT
)
X
IN
X
OUT
C2
C1
X
IN
X
OUT
C2
C1
X
IN
X
OUT
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