em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 48
em78p134n
Manufacturer Part Number
em78p134n
Description
8-bit Microcontroller With Otp Rom
Manufacturer
ELAN Microelectronics Corp
Datasheet
1.EM78P134N.pdf
(62 pages)
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EM78P134N
8-Bit Microcontroller with OTP ROM
42 •
The RC Oscillator frequencies:
Note:
5.10.4
The EM78P134N offers a versatile internal RC mode with default frequency value of
4 MHz. Internal RC oscillator mode has other frequencies (16 MHz, 8 MHz, and
455kHz) that can be set by Code Option (Word 1), RCM1, and RCM0. The Table below
describes the EM78P134N internal RC drift with voltage, temperature, and process
variations.
Internal RC Drift Rate (Ta=25°C, VDD=5V ± 5%, VSS=0V)
Note: These are theoretical values which are provided for reference only. Actual values may
RC Frequency
100 Pf
300 Pf
Internal
16 MHz
455kHz
20 Pf
Cext
8 MHz
4 MHz
2
3
1
vary depending on the actual process.
:
:
:
Measured based on DIP packages.
The values are for design reference only.
The frequency drift is ± 30%
Internal RC Oscillator Mode
(-40°C ~+85°C)
Temperature
Rext
100k
100k
100k
3.3k
5.1k
3.3k
5.1k
3.3k
5.1k
10k
10k
10k
± 6%
± 5%
± 5%
± 5%
Average Fosc 5V, 25 ° C
(2.3V~5.5V)
(This specification is subject to change without further notice)
1.27 MHz
1.21 MHz
Voltage
3.5 MHz
2.4 MHz
140kHz
805kHz
420kHz
550kHz
364kHz
188kHz
45kHz
20kHz
± 5%
± 5%
± 5%
± 5%
Drift Rate
Product Specification (V1.6) 06.02.2010
Process
± 3%
± 3%
± 3%
± 3%
Average Fosc 3V, 25 ° C
1.24 MHz
1.18 MHz
3.0 MHz
2.2 MHz
143kHz
790kHz
418kHz
526kHz
350kHz
185kHz
46kHz
20kHz
± 14%
± 13%
± 13%
± 13%
Total
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