MITSUBISHI MICROCOMPUTERS
M35048-XXXFP
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
26
NOTE FOR SUPPLYING POWER
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(1)Timing of power supplying to AC pin
The internal circuit of M35048-XXXFP is reset when the level of
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the auto clear input pin AC is “L”. This pin in hysteresis input with
the pull-up resistor.
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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) M35048-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
( 0.1F) directly between the V DD1 pin and VSS1 pin, and the
VDD2 pin and VSS2 pin using a heavy wire.
Fig. 12
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Timing of power supplying to AC pin
After supplying the power (VDD and VSS) to M35048-XXXFP and
the supply voltage becomes more than 0.8 ! VDD, it needs to
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keep VIL time; tw of the AC pin for more than 1ms.
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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.
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Set only the side which set by B/F register waveform timing under
5ns and input to HOR pin.
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*: 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.