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EM78P346N 数据表(PDF) 71 Page - ELAN Microelectronics Corp |
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EM78P346N 数据表(HTML) 71 Page - ELAN Microelectronics Corp |
71 / 96 page 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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类似说明 - EM78P346N |
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