MSM6222B-xx OKI, MSM6222B-xx Datasheet - Page 43

• Manufacturer Part Number: MSM6222B-xx
• Description: DOT MATRIX LCD CONTROLLER WITH 16 DOT COMMON DRIVER AND 40 DOT SEGMENT DRTVER
• Manufacturer: OKI

¡ Semiconductor
Differences Between HD44780 and MSM6222B-xx
LCD driving voltage (V
Bus interface speed with CPU
The increment and decrement
of the address counter in writing/
reading the data to/from the
CGRAM/DDRAM.
The repeated input frequency
(oscillation frequency=250kHz)
of display clear instruction
1/4 bias
1/5 bias
Item
LCD
)
The address counter is incremented
or decremented 6 msec
(when ƒ
busy condition is released.
(Period of busy condition is 40 ms)
So, the data cannot be written into/
read out from the RAM for 6 msec
after the busy condition was over.
610 Hz or less (1.64 ms or more)
OSC
1 MHz (1000 ns)
= 250 KHz) after the
3.0 to 11.0 (V)
4.6 to 11.0 (V)
HD44780
Since signal rise/fall time is quite fast,
the electromagnetic induction between
lines of the PCB and the cable
assignment should be noted.
The address counter is incremented
or decremented during the busy
condition.
So, data can be written into/read out
from the RAM immediately after the
busy condition was over.
78 Hz or less in 5¥7 dots (12.8 ms or
more), 56Hz or less in 5¥10 dots (17.9
ms or more)
MSM6222B - xx
1.5 MHz (667 ns)
3.0 to 8.0 (V)
3.0 to 8.0 (V)
MSM6222B-xx
43/45