STV9410 datasheet(17/25 Pages) STMICROELECTRONICS

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ADDR REGISTER

REAL ADDRESS

PROG VALUE

P12 P11 P10

G12 G11 G10

A12 A11

A10

2FF9

2FF8

Used for RAM character sets

000

0000

000

(0800h)

REAL ADDRESS

PROG VALUE

0000

000

(15C0h)

REAL ADDRESS

PROG VALUE

0000

000

(0A40h)

64 bytes blocks

Figure 12 : ADDR Register and Descriptor List Address

3.3 DISPLAY REGISTER (DISP)

Internal address : 2FFB-2FFAh

RESET value :00-00 h

(@ = RESET default configuration)

2FFB IMG GMG RMG BMG

HIC

2FFA

FLE CCE

IN1

IN0

BR3 BR2 BR1 BR0

IMG,

GMG,

RMG,

BMG

: M argin v alue of I , G , R, B out put s and

background color and insertion default attribute

of next alphanumeric character. In case of

graphic characters only I is default attribute.

HIC

: Forces alphanumeric characters background

black (R, G, B = 0), and foreground white (R, G,

B = 1) for maximum contrast, 0 = disable @

FLE

: Flashing enable, 0 = disable @

CCE

: Conceal enable, 0 = disable @

IN1,IN0 : Insertion attribute mode selection. Mode

selects value of I output during active area of

scan line in CRT mode; I output value (during

margin) is programmed with DISP register;

during uniform strip I output value is set

according to strip descriptor.

During active time slot :

0 0 : I output gets value of current code I

attribute (margin attribute or control

character attribute ) @

0 1 : I is set (”1”)

1 0 : I output gets value of current code I

attribute if I=0 R,G,B are reset to ”0”

0 1 : Reserved mode

BR(3:0) :

This value is combined with pixel value to drive

Y DAC in CRT mode :

Y= 4xG + 2xR + B + BR(2:0) + 3x(R or G or B)

(logical or)

R, G, B, I, Y, = 0 during line flyback.

Black level is output with R, G, B = ”0”.

White level is output with R, G, B = ”1”.

During frame flyback, R, G, B, I, Y provides signal

according to uniform strip descriptor FFB bit state

(see chapter 4.2.1)

During LCD mode BR(3:0) drives continuously Y

DAC. Notice that only bit 0 to 2 of BR are used in

CRT mode.

3.4. CURSOR REGISTER (CURS)

Internal address : 2FFD-2FFC h

RESET value : 00-00 h

(@= RESET default configuration)

2FFD

CEN CBL CUL

C12 C11 C10

0000

2FFC

0000

CEN

Cursor enable, 0 = disable @

CBL

0 cursor blinking off, character blinking

attribute unchanged @

1 cursor blinking on, blinking is mixed with

character blinking attribute. Blinking frequency

is around 1Hz and duty cycle 50%

CUL

0 character underline attribut is complemented

on cursor position @

1 character color is complemented on cursor

position

C(12:1) :

Cursor address (not a screen position)

STV9410

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