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參數(shù)資料
| 型號： | EM6605 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁數(shù)： | 39/43頁 |
| 文件大小： | 557K |
| 代理商： | EM6605 |
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EM6605
EM Microelectonic-Marin SA, 2/99, Rev. B/243
39
17.7. RC Oscillator
T= +25°C (unless otherwise specified)
Parameter
Fabrication process stability
Voltage stability (note2)
Temperature Stability (note2)
External resistor for frequency
(note4) (note5)
Ext. capacitor (parallel to Rext)
(note4)
Oscillator start time (note3)
System start time (note3)
(oscillator+cold start reset)
Oscillation detector frequency
Conditions
(note1)
2.4 - 5.0 V
-40°C- +85°C Df /f * DT
Vdd>1.8V
Symb.
Df / f *
Df /f * DU
Min.
-20
-2%
0.02%
80*
Typ.
±
10 *
±
0.3
+0.06% 0.1%
120-330 600*
Max.
+20
+2%
Unit
%
1/V
1/°C
k
Rext
Cext
150
390
pF
Vdd>1.8V
Vdd>1.8V
tdosc
tdsys
0.1
3
1
4
ms
ms
Vdd>1.8V &
Vdd<5.0V
f
OD
4.0
15
kHz
Note1:
Typical value of ±10% for “Fabrication process stability” gives a range where about 93-98% of all
pieces are situated relative to their mean frequency
f *
.
Note2:
Oscillator stability in voltage and temperature is for frequency range from 30kHz - 300 kHz
Note3:
Oscillator start time is for the worst case - 32 kHz frequency (low frequency)
Note4:
External capacitor parallel to Rext which set the system frequency – The capacitor must be as close as
possible to RCin pin. The connection tw. Resistor and Capacitor on this pin must be really as short as
possible otherwise the RC oscillator has bigger jitter. (capacitor is not obligatory but can improve voltage
dependance and reduce jitter.
Note5:
External resistor Rext which can set the frequency can have bigger range but this should be discussed
by EM for special cases only. Tests were made only during qualification of the product.
17.8. nput Timing characteristics
1.8V<Vdd<5.0V, -20°C <T<85°C (unless otherwise specified) at f=32kHz
Parameter
RESET pulse length to exit
SLEEP mode
RESET pulse length (debounced)
PortA , C pulse length (debounced)
RESET pulse length (debounced)
PortA , C pulse length (debounced)
Conditions
RESET from
SLEEP
DebCK = 0
DebCK = 0
DebCK = 1
DebCK = 1
Symb.
t
RESsl
Min.
2
Unit
μs
tdeb0
tdeb0
tdeb1
tdeb1
2
2
16
16
ms
ms
ms
ms
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