ST7624 Datasheet, PDF (16/98 Pages) Sitronix Technology Co., Ltd. – 65K Color Dot Matrix LCD Controller/Driver

ST7624
7. FUNCTIONAL DESCRIPTION
7.1 MICROPROCESSOR INTERFACE
Chip Select Input
There is /CS pin for chip selection. The ST7624 can interface with an MPU when /CS is "L".In case of serial interface, the
internal shift register and the counter are reset.
7.1.1 Selecting Parallel / Serial Interface
ST7624 has seven types of interface with an MPU, which are three serial and four parallel interfaces. This parallel or serial
interface is determined by IF pin as shown in table 7.1.1.
Table 7.1.1 Parallel / Serial Interface Mode
IF1 IF2 IF3
Interface type
/CS A0 /RD(E) /WR(R/W) D15 to D8 D7 to D0 SI SCL
H H H 80 serial 16-bit parallel /CS A0 /RD
/WR
D15 to D8 D7 to D0 -- --
H H L 80 serial 8-bit parallel /CS A0 /RD
/WR
--
D7 to D0 -- --
H L L 68 serial 16-bit parallel /CS A0
E
R/W
D15 to D8 D7 to D0 -- --
L H H 68 serial 8-bit parallel /CS A0
E
R/W
--
D7 to D0 -- --
L L H 9-bit SPI mode (3 line) /CS --
--
--
--
SI SCL
L L L 8-bit SPI mode (4 line) /CS A0
--
--
--
SI SCL
--:Must be fixed to either H or L.
NOTE: When these pins are set to any other combination, A0, E_RD, and RW_WR inputs are disabled and D0 to D15 are
to be high impedance.
7.1.2 8- or 16-bit Parallel Interface
The ST7624 identifies type of the data bus signals according to combinations of A0, /RD (E) and /WR (W/R) signals, as
shown in table 7.1.2.
Table 7.1.2 Parallel Data Transfer
Common
A0
6800-series
R/W
E
8080-series
/RD
/WR
Description
H
H
H
L
H
Display data read out
H
L
H
H
L
Display data write
L
H
H
L
H
Register status read
L
L
H
H
L
Writes to internal register (instruction)
Relation between Data Bus and Gradation Data
ST7624 offers the 65K color display, dithered 262K color display, 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.
Ver 1.8
16/98
2006/08/15