SNL320

16-Bit LCD Controller

ED0~ED7

I/O0~I/O7

RE\

WE\

CE\

ALE

CLE

R/B\

RD\

WR\

NCS\

ALE

CLE

R/B\

SNL320

NAND Flash

WP\

WP\

13. USB INTERFACE

The SNL320 provides a USB 1.1 interface, user can download/upload data from/to PC

through this USB interface. It is support control transfer and bulk transfer.

SNL320 provides twin buffers for data or command transition and the buffer size of

those twin buffers is 64bytes.

14. LCD INTERFACE

14.1 LCD Controller Interface (8-bit interface)

The extension bus of SNL320 supports not only external memory device but also 8-bit

8080/6800 microprocessor interface for external LCD controller which already built-in

LCD display RAM. User should enable extension bus before driving external LCD

driver, and define the chip select pin you used to connect to LCD driver in EBC

register.

In 8-bit interface LCD controller, LCD display data is stored in LCD controller. Any

change of LCD display is sent out to external LCD driver’s RAM by addressing

different SRAM space. The interface emulates the 8080/6800-series interface to

speed up the interface data moving processing.

Figure-5 and Figure-6 are the timing diagrams between SNL320 and LCD controller by using

8-bit 8080/6800 interface.

Ver: 1.2

18

July 22, 2005