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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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M34250M2 Fiches technique(PDF) 29 Page - Mitsubishi Electric Semiconductor |
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M34250M2 Fiches technique(HTML) 29 Page - Mitsubishi Electric Semiconductor |
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29 / 58 page  MITSUBISHI ELECTRIC 29 MITSUBISHI MICROCOMPUTERS 4250 Group SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER Fig. 27 Clock control circuit structure Clock signal f(XIN) is obtained by connecting XIN pin and XOUT pin directly, and externally connecting a resistor to XIN and a capacitor to XOUT. Connect this external circuit to pins XIN and XOUT at the shortest distance. When an external clock signal is input, note the input waveform (refer to the list of precaution). ROM ORDERING METHOD Please submit the information described below when ordering Mask ROM. (1) M34250M2-XXXFP Mask ROM Order Confirmation Form .............................................................................................. 1 (2) Data to be written into mask ROM ......................... EPROM (three sets containing the identical data) (3) Mark Specification Form ..................................................... 1 Fig. 28 Resistor and capacitor external circuit CLOCK CONTROL The clock control circuit consists of the following circuits. • System clock generating circuit • Control circuit to stop the clock oscillation • Control circuit to return from the RAM back-up state Internal clock generating circuit (divided by 4) Instruction clock RESET G0/INT pin K02 0 1 Ports G1–G3 Ports S0–S3 Key-on wakeup control register K00, K01 Counter Wait time control circuit (Note) Software start signal Note: The wait time control circuit is used to start the microcomputer operation after 3584 to 3585 machine cycles for the time required to stabilize the f(XIN) oscillation. Oscillation circuit R S Q POF instruction XIN XOUT Multiplexer Rising Falling Rising detected XIN XOUT The system clock frequency is affected by a capacitor, a resistor and an LSI, So, set the constants within the range of the frequency limits. |
Numéro de pièce similaire - M34250M2 |
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Description similaire - M34250M2 |
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