ST7530 datasheet(17/100 Pages) SITRONIX

17 / 100 page

ST7530

Ver 1.8

17/100

2006/9/18

8. FUNCTIONAL DESCRIPTION

8.1 MICROPROCESSOR INTERFACE

Chip Select Input

The XCS pin is for chip selection. The ST7530 can function with an MPU when XCS is "L". In case of serial interface, the

internal shift register and the counter are reset.

8.1.1 Selecting Parallel / Serial Interface

ST7530 has six types of interface with an MPU, which are four parallel and three serial interfaces. This parallel or serial

interface is determined by IF pin as shown in table 8.1.1.

Table 8.1.1 Parallel / Serial Interface Mode

IF1 IF2 IF3

Interface type

XCS

/RD(E) /WR(R/W) D15 to D8

D7 to D0

SCL

ACK

80 serial 16-bit parallel XCS

/RD

/WR

D15 to D8

D7 to D0

80 serial 8-bit parallel XCS

/RD

/WR

D7 to D0

68 serial 16-bit parallel XCS

R/W

D15 to D8

D7 to D0

68 serial 8-bit parallel XCS

R/W

D7 to D0

9-bit SPI mode (3 line) XCS

SCL

8-bit SPI mode (4 line) XCS

SCL

Note: “--” means “disabled” in pins A0, E_RD, and RW_WR, and “high impedance” in pins DB0 to DB15.

8.1.2 8- or 16-bit Parallel Interface

The ST7530 identifies the type of the data bus signals according to the combination of A0, /RD (E) and /WR (W/R) as

shown in table 8.1.2.

Table 8.1.2 Parallel Data Transfer

Common

6800-series

8080-series

R/W

/RD

/WR

Description

Display data read out

Display data write

Writes to internal register (instruction)

Relation between Data Bus and Gradation Data

ST7530 offers the dithered 65K, dithered 262K, and dithered 16M color display.

When using 65K, 262K, and 16M color, you can specify color for each of R, G, B using the palette function.

(1) 65K color display

1. 8-bit mode

D7 D6 D5 D4 D3 D2 D1 D0

R R R R R G G G 1st write

G G G B B B B B 2nd write

A single pixel of data is read after the second write operation as shown, and it is written in the display RAM.

2. 16-bit mode

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

G G G G G B B B B B

Data is acquired through the operation of writing signal, and then written to the display RAM.

ST7530 Datasheet(PDF) 17 Page - Sitronix Technology Co., Ltd.

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