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MSM7575 Datasheet(PDF) 5 Page - OKI electronic componets |
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MSM7575 Datasheet(HTML) 5 Page - OKI electronic componets |
5 / 26 page 5/25 ¡ Semiconductor MSM7575 TOUT1, TOUT2, TOUT3 These are pins for outputs of the NOR gates whose inputs are the comparator output signal between the SAO output level and the SG level, and each register signal stored by the MCU interface. The each output is NOR-gated with the comparator output and the invented signal of CR1-B7 at TOUT3, the inverted signal of CR1-B6 at TOUT2, and the inverted signal of CR1-B5 at TOUT1. AVIN, REF1, REF2 These pins are for inputs of two comparators internal to the device. AVIN is connected to each non-inverting input of comparator1 and comparator2. REF1 is connected to an inverting input of comparator1 and REF2 is connected to an inverting input of comparator2. The output of each comparator is connected to the input of ENOR. The interval analog switch SW1 is ON/OFF controlled by the output which is the logical OR of the ENOR and the CR5-B7 signal. When CR5- B7 is at "0", the SW1 is turned to OFF if AVIN is within the voltage range of REF1 and REF2 and the SW1 is turned to ON if AVIN is out of the voltage range of REF1 and REF2. AIN3+, AIN3-, GSX3, AIN4+, AIN4-, GSX4 These pins are for inputs and outputs of the internal op-amps. Refer to BLOCK DIAGRAM for the connection. IO1 to IO14 These pins are for inputs and outputs of the internal analog switch. Refer to BLOCK DIAGRAM and FUNCTIONAL DESCRIPTION for the connection and the control method. X1, X2 Crystal oscillator connection pins. X2 is for the clock output pin. When a conventional external clock is used, X1 should be connected to the ground, X2 should be left open, and the clock should be input to the MCK pin. X1 MCK 9.6 MHz or 19.2 MHz For the use of a self-oscilation circut X2 MSM7575 X1 MCK For the use of an external clock X2 MSM7575 9.6 MHz or 19.2 MHz Figure 2 Connection to a Crystal Oscillator or an External Clock |
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