FEDL9209-01

OKI Semiconductor

ML9209-xx

11/29

FUNCTIONAL DESCRIPTION

Command List

Command

LSB

First byte

MSB LSB

Second byte

MSB

B0 B1 B2 B3 B4 B5 B6 B7 B0 B1

B2

B3

B4

B5

B6

B7

1

DCRAM data write

X0 X1 X2 X3

1

0

0

0

C0 C1

C2

C3

C4

C5

C6

C7

C0 C1

C2

C3

C4

C5

C6

C7

2nd byte

2

CGRAM data write

X0 X1 X2 X3

0

1

0

0

C8 C9 C10 C11 C12 C13 C14 C15 3rd byte

3

ADRAM data write

X

0

X

1

X

2

X

3

1

1

0

0

C0 C1

*

*

*

*

*

*

5

Display duty set

D0 D1 D2 D3

1

0

1

0

6

Number of digits set

K0 K1 K2 K3

0

1

1

0

7

All display lights

ON/OFF

L

H

*

*

1

1

1

0

Others (test mode)

*

: Don’t care

Xn : Address setting for each RAM

Cn : Character code setting for each RAM

Dn : Display duty setting

Kn : Setting of the number of display digits

H

: All display lights ON setting

L

: All display lights OFF setting

When data is written to RAM (DCRAM, CGRAM, and ADRAM) continuously, addresses are internally

incremented automatically.

Therefore it is not necessary to specify the 1st byte to write RAM data for the 2nd

and subsequent bytes.

Note: The test mode is used for inspection before shipment.

It is not a user function.

Positional Relationship Between SEGn and ADn (one digit)

SEG1

C0

SEG2

C1

C4

SEG5

C5

SEG6

C14

SEG15

C10

SEG11

C11

SEG12

C13

SEG14

C9

SEG10

C15

SEG16

C0–7: Corresponds to the 2nd byte of the CGRAM data write

command.

C8–15: Corresponds to the 3rd byte of the CGRAM data write command.