UPD6461GS datasheet(30/60 Pages) NEC

30 / 60 page

µPD6461, 6462

3.7 WRITE ADDRESS CONTROL COMMAND

This command specifies the address at which a character is written in the display area (video RAM) of 12 rows

× 24 columns

(this command is a 2-byte command, requiring 16 bits for each command, even when continuously input).

(1) For MSB-first transfer (Command bits are input starting from the MSB (D15).)

D15

D14

D13

D12

D11

D10

AR3

AR2

AR1

AR0

AC4

AC3

AC2

AC1

AC0

(MSB)

(LSB)

AC4

AC3

AC2

AC1

AC0

AR3

AR2

AR1

AR0

Column address specification bits

Column

Column 0

Column 1

Column 23

Any other value is invalid.

Column address specification bits

Row address specification bits

Row

Row 0

Row 1

Row 11

Any other value is invalid.

(2) For LSB-first transfer (Command bits are input starting from the LSB (D0). The function of each bit is the same as

that for MSB-first transfer.)

•

Column write address specification bits

The display area has 24 columns. These bits are used to specify the column in which a character is to be written.

•

Row write address specification bits

The display area has 12 rows. These bits are used to specify the row in which a character is to be written.

(LSB)

(MSB)

D10

D11

D12

D13

D14

D15

AR3

0010001

AC0

AC1

AC2

AC3

AR4

AR0

AR1

AR2

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