VII LCD CONTROLLER BLOCK: LCD CONTROLLER

(3) 4-bpp (16-gray-level/16-color) mode

One pixel is represented by 4 bits, displayed in 16 gray levels or 16 colors.

For monochrome LCD panels, 16-gray-level display can be obtained by assigning 16 gray levels, including black and white, to 16 entries in the green look-up table (one each for bits = "0000" to "1111").

For color LCD panels, 16 colors from among the 4,096 colors available can be set in advance using 16 entries for pixel data "0000" to "1111" in each of the red, green, and blue look-up tables.

Data for two consecutive pixels is stored as one byte in the display memory.

 

(bit 7)

 

Display memory

 

(bit 0)

 

 

 

 

 

LCD panel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 2

 

 

 

 

 

 

 

 

 

 

 

 

 

P0

P1

P2

P3

P4

P5

P6

P7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A4

 

B4

C4

D4

A5

B5

C5

 

D5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 1

 

A2

 

B2

C2

D2

A3

B3

C3

 

D3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A0

 

B0

C0

D0

A1

B1

C1

 

D1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pn = (An, Bn, Cn, Dn)

Figure 2.6 Data Format in 4-bpp Mode

(4) 8-bpp (256-color) mode

One pixel is represented by 8 bits, displayed in 256 colors. This mode is not available for grayscale display. In this mode, 256 discrete combinations are configured using eight entries in each of the red and green lookup tables, and four entries in the blue look-up table.

Data for one pixel is stored as one byte in the display memory.

 

(bit 7)

 

Display memory

 

(bit 0)

 

 

 

 

 

LCD panel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P0

P1

P2

P3

P4

P5

P6

P7

 

Byte 2

 

R22

R2

R2

G22

G21

G20

B21

 

B20

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 1

 

R12

R11

R10

G12

G11

G10

B11

 

B10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Byte 0

 

R02

R01

R00

G02

G01

G00

B01

 

B00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pn = (Rn2, Rn1, Rn0, Gn2, Gn1, Gn0, Bn1, Bn0)

Figure 2.7 Data Format in 8-bpp Mode

B-VII-2-10

EPSON

S1C33L03 FUNCTION PART