SNL320

16-Bit LCD Controller

Symbol

Descriptions

No. of PIn

Pin Count

P3.0~P3.15

General I/O port P3.0~P3.15

P3.0: INT0

P3.1: INT1

P3.2: INT2 / IR output

P3.3: NCSB

P3.4: CLE

P3.5: ALE

P3.6: R/B\

P3.7: WPB

P3.8: CS3/EA23

P3.9: CS2

P3.10: CS1

P3.11: CS0

P3.12: LACD

P3.13: LCLK

P3.14: LP

P3.15: FP

16

109

P4.0~P4.3

General I/O port P4.0~P4.3

LCD data bus

4

113

4.

MEMORY

4.1

Internal ROM

SNL320 provides hi-compression algorithm to compress voice data in order to save

more memory size. So all the de-compression program are built in the internal ROM of

SNL320 and system will reserved some necessary ROM space for those

de-compression program automatically once user active the de-compression function.

There are totally 64K words of SNL320 internal ROM, user can built-in his own

program in the internal ROM for his application except necessary space for

de-compression program.

4.2

Internal RAM

The internal totally 9K words RAM will be separated into two parts, the SRAM regions

0xA000~0xAFFF and 0x0000~0x03FF are reserved for system and user’s application,

the SRAM regions 0xB000~0xBFFF is reserved for LCD display buffer. User has to

define the actual LCD display buffer region by set LBUFL (LCD display buffer register).

Ver: 1.2

6

July 22, 2005