MB90091A Ver la hoja de datos (PDF) - Fujitsu

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MB90091A

Intelligent on-screen display controller (IOSDC)

Fujitsu 

MB90091A

1. Command 0 (Set Write Address)

• Command format

MSB

First byte

1

0

0

0

0

MSB

Second byte 0

A6 A5 A4 A3

A8 to A0: VRAM address

0 A8

A2 A1

LSB

A7

LSB

A0

• Function

Command 0 specifies the write address in display memory (VRAM). Before writing data using commands 1

and 2, use this command to determine the address to write that data at.

• Description

To set the VRAM address, specify the vertical column address (A8 to A5) and horizontal row address (A4 to

A0). The VRAM address is incremented automatically when a character code is set (by command 2).

A8 to A0: VRAM address

Set the VRAM address.

The A8 to A5 bits specify the vertical column address; the A4 to A0 bits specify the horizontal row address.

The row address is valid between 00H to 17H.

The column address is valid between 0H to BH.

Do not set the column or row address to any value outside the above valid range.

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