OPERATION PANEL CONTROLLER

M66271FP

MITSUBISHI <DIGITAL ASSP>

Control register

M66271FP has 9 kinds of control register.

To set mode from MPU to control register,use IOCS,

LWR,RD,A<4:0> and D<7:0>.

(1) Kind of control register

Kind of register

Address

Functions of register

R/W

No.

Name

A3 A2 A1

R2

Horizontal display

character number

register

Set the number of horizontal display

characters per line.

W

R3

Horizontal

synchronous pulse

width register

Set the pulse width of LP per line.

W

R5

Set the number of display line of

vertical direction.

W

Set the display start address of VRAM.

Set lower 8-bit to SAL and upper 6-bit to

Control register Table

R6

Display start

address register

R7

R/W

R1 Mode register

D6 – D0 set the basic mode.

D7 is the status register of cycle steal

state.

R4

Cycle steal enable

width register

Set the term of cycle steal enable access

during horizontal synchronous term.

W

R8

M cycle variable

register

Set the cycle of LCD alternating signal

from M .

W

D7=Only

"R"

R/W

A0

Data

D7

D6

D5

D4

D3

D2

D1

D0

CR

LPW

SLT

SAL

SAH

DISP

REV

LCDE

OSCC

CSW

MT

CSES

A4

R9

R10

R11

Data port

register

VRAM address

index register

01

00

0

10

00

0

00

00

0

11

00

0

01

10

0

10

10

0

00

10

0

11

10

0

00

00

1

01 0

0

1

10

00

1

Data port register for accessing VRAM

through the register.

Set the address for accessing VRAM.

Set lower 8-bit to IDXL and upper 6-bit to

IDXH.

And automatically increase in continuous

address .

R/W

DP

IDXL

IDXH

R/W

Note:Data port register(DP) and VRAM address index register(IDXL,IDXH) are exclusive register,when using this IC for

the LCD module built-in system.

When RESET,each register is initialize the setting which is assumed LCD size of 320

Then,even if each register has not setting,output the signal to LCD side ,it is possible to be alternation of LCD.

RESET

Vertical line

number register