m35046 Renesas Electronics Corporation., m35046 Datasheet - Page 27

• Manufacturer Part Number: m35046
• Description: Screen Character And Pattern Display Controllers
• Manufacturer: Renesas Electronics Corporation.

NOTE FOR SUPPLYING POWER
Timing of power supplying to AC pin
The internal circuit of M35046-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 11.
Timing of power supplying to V
Supply power to V
Fig. 11
26
After supplying the power (V
the supply voltage becomes more than 0.8
V
Start inputting from microcomputer after AC pin supply voltage
becomes more than 0.8
PRECAUTION FOR USE
In order to avoid noise and latch-up, connect a bypass capacitor
( 0.1 F) directly between the V
and V
Notes on noise and latch-up
IL
time; tw of the AC pin for more than 1ms.
SS
pin using a heavy wire.
Timing of power supplying to AC pin
0.8
0.2
V
V
V
DD1
__
DD
DD
DD
Voltage
and V
__
[V]
V
DD
DD2
DD
__
DD1
DD1
and keeping 200ms wait time.
and V
at the same time.
and V
pin and V
SS
) to M35046-XXXSP/FP and
DD2
__
__
SS
.
V
more than 1ms
pin, and the V
DD
, it needs to keep
Supply voltage
__
t
W
DD2
pin
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
DATA REQUIRED FOR MASK ROM ORDERING
Please send the following data for mask orders.
(1) M35046-XXXSP/FP mask ROM order confirmation form
(2) 20P4B mask specification form
(3) 20P2Q-A mask specification from
(4) ROM data (EPROM 3 sets)
(5) Floppy disks containing the character font generating program
+ character data
V
(AC pin input voltage)
AC
MITSUBISHI MICROCOMPUTERS
t
S
M35046-XXXSP/FP
Time t
[
s
]