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TC9329AFAG 데이터시트(PDF) 10 Page - Toshiba Semiconductor |
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TC9329AFAG 데이터시트(HTML) 10 Page - Toshiba Semiconductor |
10 / 83 page TC9329AFAG/AFCG 2006-03-02 10 Pin No. Symbol Pin Name Function and Operation Remarks 55 XOUT 56 XIN Crystal oscillator pin Crystal oscillator pins. A reference 75 kHz crystal resonator is connected to the XIN and XOUT pins. The oscillator stops oscillating during CKSTP instruction execution. The VXT pin is the power supply for the crystal oscillator. A stabilizing capacitor (0.47 µF typ.) is connected. Usually, the clock of a crystal oscillator is used for the clock for peripheral equipment. Through programming, the built-in VCO can be changed to CPU and CPU only operation can be accelerated. 58 VDB 59 C1 60 C2 61 VEE 62 C3 63 C4 64 VLCD Voltage doubler boosting output pins Voltage doubler boosting output pins. The VDB pin doubles the VDD pin voltage using the voltage doubler boosting capacitor between C1 and C2. The doubled voltage is used for the AD converter and constant voltage circuit (Vreg, VEE) power supply. The VEE pin supplies a constant voltage of 1.5 V from the VDB voltage. The voltage is doubled (to 3 V) using the voltage doubler boosting capacitor between C3 and C4. The doubled voltage is then supplied to the VLCD pin. The VEE potential and the VLCD potential are used to drive the LCD. Connect a stabilizing capacitor between the VDB pin and GND (0.1 µF, 10 µF typ.), and between the VLCD pin and GND (0.1 µF typ.). Connect a voltage doubler boosting capacitor (0.1 µF typ.) between C1 and C2, and between C3 and C4. (Note) Note: When the LCD pin is set as an output port, the “H” level output is the doubled voltage VLCD. Therefore disconnect the voltage boosting capacitor and connect the VLCD pin to the VDD pin. VDD RfXT XOUT XIN ROUT VLCD |
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