MSM6222 Datasheet

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隆 Semiconductor

Differences Between HD44780 and MSM6222B-xx

Item

LCD driving voltage (V

LCD

)

1/4 bias

1/5 bias

Bus interface speed with CPU

HD44780

3.0 to 11.0 (V)

4.6 to 11.0 (V)

1 MHz (1000 ns)

MSM6222B-xx

MSM6222B - xx

3.0 to 8.0 (V)

3.0 to 8.0 (V)

1.5 MHz (667 ns)

Since signal rise/fall time is quite fast,

the electromagnetic induction between

lines of the PCB and the cable

assignment should be noted.

The increment and decrement

of the address counter in writing/

reading the data to/from the

CGRAM/DDRAM.

The address counter is incremented

or decremented 6

msec

(when 茠

OSC

= 250 KHz) after the

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)

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.

The repeated input frequency

(oscillation frequency=250kHz)

of display clear instruction

78 Hz or less in 5楼7 dots (12.8 ms or

more), 56Hz or less in 5楼10 dots (17.9

ms or more)

43/45

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