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EM78P346N 数据表(PDF) 71 Page - ELAN Microelectronics Corp

部件名 EM78P346N
功能描述  8-Bit Microprocessor with OTP ROM
Download  96 Pages
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制造商  EMC [ELAN Microelectronics Corp]
网页  http://www.emc.com.tw
标志 EMC - ELAN Microelectronics Corp

EM78P346N 数据表(HTML) 71 Page - ELAN Microelectronics Corp

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EM78P346N
8-Bit Microprocessor with OTP ROM
Product Specification (V1.0) 12.25.2007
• 65
(This specification is subject to change without further notice)
The RC Oscillator frequencies:
Cext
Rext
Average Fosc 5V, 25
°C
Average Fosc 3V, 25
°C
3.3k
3.5 MHz
3.0 MHz
5.1k
2.4 MHz
2.2 MHz
10k
1.27 MHz
1.24 MHz
20 Pf
100k
140 kHz
143 kHz
3.3k
1.21 MHz
1.18 MHz
5.1k
805 kHz
790 kHz
10k
420 kHz
418 kHz
100 Pf
100k
45 kHz
46 kHz
3.3k
550 kHz
526 kHz
5.1k
364 kHz
350 kHz
10k
188 kHz
185 kHz
300 Pf
100k
20 kHz
20 kHz
Note:
1: Measured based on DIP packages.
2: The values are for design reference only.
3: The frequency drift is ± 30%
6.11.4 Internal RC Oscillator Mode
The EM78P346N offers a versatile internal RC mode with default frequency value of
4MHz. Internal RC oscillator mode has other frequencies (16MHz, 1MHz, and 455kHz)
that can be set by Code Option (Word 1), RCM1, and RCM0. The Table below describes
the EM78P346N internal RC drift with voltage, temperature, and process variations.
Internal RC Drift Rate (Ta=25°C, VDD=5V±5%, VSS=0V)
Drift Rate
Internal
RC Frequency
Temperature
(-40°C ~+85°C)
Voltage
(2.3V~3.9V~5.5V)
Process
Total
4MHz
±5%
±5%
±4%
±14%
16MHz
±5%
±5%
±4%
±14%
1MHz
±5%
±5%
±4%
±14%
455MHz
±5%
±5%
±4%
±14%
Theoretical values are for reference only. Actual values may vary depending on the actual process.
Table 1 Calibration Selection for Internal RC Mode
C3
C2
C1
C0
*Cycle Time (ns)
*Frequency (MHz)
0
0
0
0
390.6
2.56
0
0
0
1
365.0
2.74
0
0
1
0
342.5
2.92
0
0
1
1
322.6
3.1
0
1
0
0
304.9
3.28
0
1
0
1
289.0
3.46
0
1
1
0
274.7
3.64


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