Second byte

Register content

DA0 to DA7

Register name

State

Function

Note

7

—

0

Second byte identification code

6

—

0

5

—

0

4

H4

0

1

3

H3

0

1

2

H2

0

Display memory character address (from 0 to 17 (hexadecimal))

1

1

H1

0

1

0

H0

0

1

Note: When the chip is reset by the RST pin, the register states (bits) are all cleared to 0.

2

COMMAND1: Display Character Data Write Command

First byte

Register content

DA0 to DA7

Register name

State

Function

Note

7

—

1

When this command is entered, the

6

—

0

The command 1 identification code:

chip locks in display character write

5

—

0

sets the display memory write address.

mode until the CS pin is set high.

4

—

1

3

—

0

2

—

0

1

at2

0

Turns character attribute 2 off.

Specifies highlight or flashing.

1

Turns character attribute 2 on.

0

at1

0

Turns character attribute 1 off.

Specifies reverse video.

1

Turns character attribute 1 on.

Second byte

Register content

DA0 to DA7

Register name

State

Function

Note

7

—

0

6

c6

0

1

5

c5

0

1

4

c4

0

1

Character code (from 00 to 7F (hexadecimal))

3

c3

0

1

2

c2

0

1

1

c1

0

1

0

c0

0

1

Note: When the chip is reset by the RST pin, the register states (bits) are all cleared to 0.

No. 4453-7/14

LC74760, 74760M