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EM78P153EP Datasheet(PDF) 29 Page - ELAN Microelectronics Corp |
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EM78P153EP Datasheet(HTML) 29 Page - ELAN Microelectronics Corp |
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29 / 38 page ![]() EM78P153E OTP ROM This specification is subject to change without prior notice. 2002/03/01 29 <Note>: RC mode set-up time always 135ns. • Bit 4 (Type): Reserved. The bit4 set to “0” all the time. • Bit 3 (RCOUT): A selecting bit of High or Low frequency for internal RC Oscillator. RCOUT Pin Function 0 P64 1 OSCO • Bit 2, Bit 1, and Bit 0 ( CAL2, CAL1, CAL 0 ): Calibrator of internal RC mode Bit 3 Table 13 Calibration Selection for Internal RC Mode C2 C1 C0 *Cycle Time (ns) *Frequency (MHz) 1 0 1 200.4 4.99 1 0 0 211.9 4.72 0 0 1 223.7 4.47 0 0 0 236.4 4.23 1 1 1 250.0 4.00 1 1 0 264.6 3.78 0 1 1 279.3 3.58 0 1 0 295.0 3.39 *: 1. Theoretical values, an instance of the high frequency mode, are shown for reference only, It depend on process. 2. Similar way of calculation is also applicable for low frequency mode. 3. Code Option Register (Word 1) WORD1 Bit1 Bit0 1 0 RCM1 RCM0 Bit 1, and Bit 0 ( RCM1, RCM0): RC mode selection bits RCM 1 RCM 0 *Frequency(MHz) 1 1 4 0 1 1 0 0 455kHz 4. Customer ID Register (Word 2) Bit 12~Bit 0 XXXXXXXXXXXXX Bit 12~ 0 : Customer’s ID code 4.9 Power On Considerations Any microcontroller is not guaranteed to start to operate properly before the power supply stays at its steady state. |
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