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M35052 数据表(PDF) 32 Page - Renesas Technology Corp

部件名 M35052
功能描述  SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
PDF  37 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

M35052 数据表(HTML) 32 Page - Renesas Technology Corp

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MITSUBISHI MICROCOMPUTERS
M35052-XXXSP/FP
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
31
Note for Supplying Power
(1)
__
Timing of power supplying to AC pin
The internal circuit of M35052-XXXSP/FP is reset when the level
__
of the auto clear input pin AC is “L”. This pin is hysteresis input
__
with the pull-up resistor. The timing about power supplying of AC
pin is shown in Figure 20. tW is the interval after the supply volt-
age becomes 0.8 ! VDD or more and before the supply voltage to
__
__
the AC pin (VAC) becomes 0.2 ! VDD or more.
After supplying the power (VDD and VSS) to M35052-XXXSP/FP,
the tW time must be reserved for 1ms or more. Before starting
input from the microcomputer, the waiting time (ts) must be re-
__
served for 500ms after the supply voltage to the AC pin becomes
0.8 ! VDD or more.
(2) Timing of power supplying to VDD1 pin and VDD2 pin
The power need to supply to VDD1 and VDD2 at a time, though it
is separated perfectly between the VDD1 as the digital line and
the VDD2 as the analog line.
ROM ORDERING METHOD
Please submit the information described below when ordering Mask
ROM.
(1) ROM Order Confirmation Form ................................................. 1
(2) Data to be written into mask ROM ................................ EPROM
(three sets containing the identical data)
(3) Mark Specification Form ............................................................ 1
(4) Program for character font generating + froppy disk in which char-
acter data is input
PRECAUTION FOR USE
Notes on noise and latch-up
Connect a capacitor (approx. 0.1 ˚F) between pins VDD and VSS at
the shortest distance using relatively thick wire to prevent noise and
latch up.
__
Fig. 20 Timing of power supplying to AC pin
Supply voltage
VDD
0.8!VDD
0.2!VDD
tw
Voltage mV n
Time t [s]
VAC
i
AC pin input voltage j
ts



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