Second byte

Note: All registers are set to 0 when the LC74770M is reset by the RST pin.

2

COMMAND 1 (Display character data write setup command)

First byte

Second byte

Note: All registers are set to 0 when the LC74770M is reset by the RST pin.

No. 4248-6/11

LC74770M

Register content

DA0 to DA7

Register name

State

Function

Note

7

—

0

Second byte identification bit

6

—

0

5

—

0

4

H4

0

1

3

H3

0

1

2

H2

0

Display memory address (0 to 17 hexadecimal)

1

1

H1

0

1

0

H0

0

1

Register content

DA0 to DA7

Register name

State

Function

Note

7

—

1

6

—

0

Command 1 identification code

5

—

0

Sets up display character data write.

4

—

1

3

—

0

2

—

0

1

—

0

0

—

0

When this command is input, the

LC74770M locks into the display

character data write mode until the CS

pin goes high.

Register content

DA0 to DA7

Register name

State

Function

Note

7

at

0

Character attribute off

1

Character attribute on

6

c6

0

1

5

c5

0

1

4

c4

0

1

3

c3

0

Character code (00 to 7F hexadecimal)

1

2

c2

0

1

1

c1

0

1

0

c0

0

1