M66273FP datasheet(12/34 Pages) MITSUBISHI

12 / 34 page

LCD CONTROLLER with VRAM

M66273FP

MITSUBISHI <DIGITAL ASSP>

Ver.3.1 Dec,1999

Function

[R12, R13] VRAM address index (8bit MPU only)

R/W

Address

Function

Reset

D6 to D0

00H

·VRAM address index register only for LCD

module built-in system. Sets the VRAM

address to access.

·Since IDX8H and IDX8L are independent from

each other, either one of the register values

can also be set and modified.

In addition, automatic increments are made

for consecutive addresses.

·Reading IDX8H outputs "0" to D7.

·Resetting sets "0000H".

IDX8H

Restriction

R/W

16H

(IDX8L)

00H

4AH

·VRAM addresses to

access can be set to

0000H to 4AFFH.

Settings except for the

above must not be made.

D7 to D0

00H

IDX8L

01H

02H

FFH

VRAM address

to access

0000H

0001H

0002H

4AFFH

18H

(IDX8H)

00H

[R14] Data port (8bit MPU only)

R/W

Address

Function

Reset

D7 to D0

·Data port register only for LCD module built-

in type support additional functions. Via this

MPU and VRAM.

·Completion of access to DP8 increments the

IDX8H and IDX8L values by +1.

· Resetting outputs undetermined data.

DP8

Restriction

R/W

1AH

Data port (8bit)

XXH

(Undetermined)

[R15] VRAM address index (16bit MPU only)

R/W

Address

Reset

D14 to D0

0000H

·VRAM address index register only for LCD

module built-in type support addi-tional

functions. Sets the VRAM address to

access.

·Automatically incremented for consecu-tive

addresses.

·Reading IDX16 outputs "0" to D15.

·Resetting sets "0000H".

IDX16

Restriction

R/W

1CH

0002H

0004H

4AFEH

·VRAM address to ac-cess

can be set to 0000H to

4AFEH.

Settings except for the

above must not be made.

·Set the VRAM address

with D<14:1> and fix it to

D<0>=0.

D15

VRAM address

to access

0000H

0002H

0004H

4AFEH

0000H

Note : With SWAP="1" set, set the byte-swapped data for the VRAM address to access.

(Set low order bytes of VRAM address to D<15:8> and set high order bytes of VRAM address to D<7:0>.)

[R16] Data port (16bit MPU only)

R/W

Address

Function

Reset

D15 to D0

·Data port register only for LCD module built-

in type support additional functions. Via this

MPU and VRAM.

·Completion of access to DP16 incre-ments

the IDX16 value by +1.

·Resetting outputs undetermined data.

DP16

Restriction

R/W

1EH

Data port (16bit)

XXXXH

(Undetermined)

Note : Registers R12 to R16 are used only for LCD module built-in system.

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