SNL320
16-Bit LCD Controller
Symbol
Descriptions
General I/O port P3.0~P3.15
P3.0: INT0
No. of PIn Pin Count
P3.0~P3.15
16
109
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
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
SONIX [ SONIX TECHNOLOGY COMPANY ]
