ST7586S 데이터 시트보기 (PDF) - Sitronix Technology Co., Ltd.

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ST7586S

4-Level Gray Scale Dot Matrix LCD Controller/Driver

Sitronix Technology Co., Ltd. 

ST7586S

Display Data RAM (DDRAM)

ST7586S containing a 384x160x2 bit static RAM stores the display data. The display data RAM (DDRAM) stores the pixel

data of the LCD. The built-in DDRAM is an addressable memory array with 384 columns by 160 rows. ST7586S provides two

kinds of display modes (monochrome mode and 4-level gray scale mode) and a fast-addressing mode for fast updating

display data. Each column address represents 3 sub-columns. For example, setting the column address to “01h” means that

upcoming 8 bits data is addressing to column 3; column 4 and column 5 respectively (refer to Fig. 3 and Fig. 4). The display

data which is written by MCU will be stored in DDRAM with the format of D7 at the left and D0 at the right when MX=0 (refer

to Fig. 3 and Fig. 4). The row address is directly related to the row output number. The LCD controller reads the pixel data in

DDRAM, and then it outputs to COM/SEG pad. While the LCD controller operates independently, display data can be written

into DDRAM at the same time and data is also being displayed on LCD panel without causing the abnormal display.

SEG

3N

(3 Bits)

SEG SEG

3N+1 3N+2

(3 Bits) (2 Bits)

D7 D6 D5 D4 D3 D2 D1 D0

11110001

SEG

3N

(3 Bits)

SEG SEG

3N+1 3N+2

(3 Bits) (2 Bits)

D7 D6 D5 D4 D3 D2 D1 D0

00010011

11100100111001

01001110000101

11110011000010

11001110000011

001011

111001

000101

100001

Display Data RAM

11110011111001

01110011000101

11100110100001

01001110000101

100111

100110

001101

011100

Liquid Crystal Display

3 Bits Data

D7 D6 D5

(D4) (D3) (D2)

111

DDRAM

11

00000

10010

01001

LCD

2 Bits Data

DDRAM

D1 D0

LCD

1111

0000

1010

0101

Fig. 3

Fix LSB to 0 if Gray Mode

DDRAM Mapping (4-Level Gray Scale Mode)

Ver-1.1a

18/63

2009/11/30

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