Epson S1C33L03 User Manual

VII LCD CONTROLLER BLOCK: LCD CONTROLLER

S1C33L03 FUNCTION PART

EPSON

B-VII-2-9

A-1

B-VII

LCDC

Display Modes

The number of gray levels in grayscale display and the number of colors in color display are determined by the

number of bits representing each pixel (bpp = bits per pixel). Write this bpp value to BPP[1:0] (D[7:6])/LCDC

mode register 1 (0x39FFE2) in order to set the display mode (number of gray levels/colors displayed).

Table 2.5 Specification of Display Modes

LDCOLOR

BPP1

BPP0

Display mode

2 gray levels

1 bit-per-pixel

4 gray levels

2 bit-per-pixel

16 gray levels

4 bit-per-pixel

Reserved

2 colors

1 bit-per-pixel

4 colors

2 bit-per-pixel

16 colors

4 bit-per-pixel

256 colors

8 bit-per-pixel

(1) 1-bpp (2-gray-level/2-color) mode

One pixel is represented by 1 bit, displayed in two gray levels or two colors.

For monochrome LCD panels, 2-gray-level display can be obtained by assigning two gray levels from among

the 16 gray levels available, including black and white, to two entries in the green look-up table (described

later) (one each for bits = "0" and "1").

For color LCD panels, two colors from among the 4,096 colors available can be set in advance using two

entries for pixel data "0" and "1" in each of the red, green, and blue look-up tables.

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

A0 A1 A2 A3 A4 A5 A6 A7

A8 A9 A10 A11 A12 A13 A14 A15

P0 P1 P2 P3 P4 P5 P6 P7 P8

Display memory

Pn = (An)

LCD panel

Byte 0

Byte 1

(bit 7)

(bit 0)

Figure 2.4 Data Format in 1-bpp Mode

(2) 2-bpp (4-gray-level/4-color) mode

One pixel is represented by 2 bits, displayed in four gray levels or four colors.

For monochrome LCD panels, 4-gray-level display can be obtained by assigning four gray levels from among

the 16 gray levels available, including black and white, to four entries in the green look-up table (one each for

bits = "00" to "11").

For color LCD panels, four colors from among the 4,096 colors available can be set in advance using four

entries for pixel data "00" to "11" in each of the red, green, and blue look-up tables.

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

A0 B0 A1 B1 A2 B2 A3 B3

A4 B4 A5 B5 A6 B6 A7 B7

P0 P1 P2 P3 P4 P5 P6 P7

Pn = (An, Bn)