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M35049 Datasheet(PDF) 26 Page - Mitsubishi Electric Semiconductor |
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M35049 Datasheet(HTML) 26 Page - Mitsubishi Electric Semiconductor |
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26 / 50 page  MITSUBISHI MICROCOMPUTERS M35049-XXXFP SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS 26 NOTE FOR SUPPLYING POWER __ (1)Timing of power supplying to AC pin The internal circuit of M35049-XXXFP 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 12. DATA REQUIRED FOR MASK ROM ORDER- ING Please send the following data for mask orders. (1) M35049-XXXFP mask ROM order confirmation form (2) 20P2Q-A mask specification from (3) ROM data : EPROMs or floppy disks *In the cace of EPROMs, three sets of EPROMs are required per pattern. *In the cace of floppy disks, 3.5-inch 2HD disk (IBM format) is required per pattern. 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 VSS1 pin, and the VDD2 pin and VSS2 pin using a heavy wire. Fig. 12 __ Timing of power supplying to AC pin After supplying the power (VDD and VSS) to M35049-XXXFP 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. (2)Timing of power supplying to VDD1 and VDD2. Supply power to VDD1 and VDD2 at the same time. Note for horizontal synchronous signal input to the HOR pin Set horizontal synchronous signal edge* waveform timing to under 5ns and input to HOR pin. _ Set only the side which set by B/F register waveform timing under 5ns and input to HOR pin. _ *: Set front porch edge or back porch edge by B/F register (ad- dress 12816). 90% 10% tf tr Horizontal synchronous signal Voltage [V] VDD 0.8 x VDD 0.2 x VDD Supply voltage more than 1ms tW tS Time t [s] Data input disable VAC (AC pin input voltage) Note for external clock input to the TCK pin Input to the TCK pin a constant-period continuous external clock that synchronizes with the horizontal synchronous signal. Never stop inputting the clock while displaying. |
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