m35049 Renesas Electronics Corporation., m35049 Datasheet - Page 27

• Manufacturer Part Number: m35049
• Description: Screen Character And Pattern Display Controllers
• Manufacturer: Renesas Electronics Corporation.

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.
Fig. 12
PRECAUTION FOR USE
In order to avoid noise and latch-up, connect a bypass capacitor
( 0.1µF) directly between the V
V
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).
26
Note for horizontal synchronous signal input to the HOR pin
Notes on noise and latch-up
DD2
pin and V
Horizontal synchronous signal
Timing of power supplying to AC pin
0.8 x V
0.2 x V
SS2
V
pin using a heavy wire.
DD
DD
DD
Voltage [V]
__
__
_
DD1
__
90%
pin and V
more than 1ms
10%
__
Supply voltage
t
W
SS1
tf
_
pin, and the
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
tr
After supplying the power (V
the supply voltage becomes more than 0.8
keep V
Start inputting from microcomputer after AC pin supply voltage
becomes more than 0.8
(2)Timing of power supplying to V
Supply power to V
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.
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
Note for external clock input to the TCK pin
*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.
Data input disable
IL
time; tw of the AC pin for more than 1ms.
t
S
DD1
MITSUBISHI MICROCOMPUTERS
and V
__
V
DD
DD2
DD
and keeping 200ms wait time.
and V
at the same time.
DD1
M35049-XXXFP
V
(AC pin input voltage)
Time t [s]
AC
and V
SS
) to M35049-XXXFP and
__
DD2
.
V
DD
, it needs to