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M35045 Datasheet(PDF) 23 Page - Mitsubishi Electric Semiconductor |
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M35045 Datasheet(HTML) 23 Page - Mitsubishi Electric Semiconductor |
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23 / 37 page  23 MITSUBISHI MICROCOMPUTERS M35045-XXXSP/FP SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS Note for Supplying Power __ Timing of power supplying to AC pin The internal circuit of M35045-XXXSP/FP is reset when the level of __ the auto clear input pin AC is “L”. This pin in hysteresis input with the __ pull-up resistor. The timing about power supplying of AC pin is shown in Figure 10. Timing of power supplying to VDD1 and VDD2. Supply power to VDD1 and VDD2 at the same time. Fig. 10 Timing of power supplying to AC pin DATA REQUIRED FOR MASK ROM ORDERING Please send the following data for mask orders. (1) M35045-XXXSP/FP mask ROM order confirmation form (2) 20P4B mask specification form (3) ROM data (EPROM 3 sets) (4) Floppy disks containing the character font generating program + character data Supply voltage VAC (AC pin input voltage) 0.8 × VDD 0.2 × VDD tW tS VDD Time t[s] more than 1ms Voltage [V] After supplying the power (VDD and VSS) to M35045-XXXSP/FP and the supply voltage becomes more than 0.8 × VDD, it needs to keep __ VIL time; tw of the AC pin for more than 1ms. __ Start inputting from microcomputer after AC pin supply voltage becomes more than 0.8 ! VDD and keeping 200ms wait time. PRECAUTION FOR USE Notes on noise and latch-up In order to avoid noise and latch-up, connect a bypass capacitor ( ≈0.1µF) directly between the VDD1 pin and VSS pin, and the VDD2 pin and VSS pin using a heavy wire. |
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