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M35074 数据表(PDF) 32 Page - Renesas Technology Corp

部件名 M35074
功能描述  SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
PDF  44 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

M35074 数据表(HTML) 32 Page - Renesas Technology Corp

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MITSUBISHI MICROCOMPUTERS
M35074-XXXSP
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
31
NOTE FOR SUPPLYING POWER
(1)
__
Timing of power supplying to AC pin
The internal circuit of M35074-XXXSP 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 15.
DATA REQUIRED FOR MASK ROM
ORDERING
Please send the following data for mask orders.
(1) M35074-XXXSP mask ROM order confirmation form
(2) 20P4B mark specification form
(3) ROM data : EPROMs or floppy disks
*In the case of EPROMs, thres sets of EPROMs are required
per pattern.
*In the case of floppy disks, 3.5-inch 2HD disk (1BM 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.17 Timing of power supplying to AC pin
After supplying the power (VDD and VSS) to M35074-XXXSP
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 waveform timing of the horizontal signals 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 12716) .
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)
90%
10%
tf
tr
Horizontal synchronous signal



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