SNL320

16-Bit LCD Controller

1.

INTRODUCTION

The SNL320 is a high performance 16-bit DSP base processor with 16MIPS CPU power. The

internal 64K words hi-speed ROM already built-in a hi-performance software voice synthesizer

to provides lot of voice effects. Such as hi-decompression engine to support from 1.5kbps ~

29kbps compression rate for speech and music, multi-channel voice synthesizer to provides

8-channel wave-table melody, or support foreground 1.5kbps~29kbps and background

4-channel wave-table melody.

The standard microprocessor interface allows SNL320 to extend its memory capability, or

connect external device. We also built-in a Low Voltage Detector circuit for power

management and a USB 1.1 interface for communication with PC.

2.

FEATURES

♦

Power supply:

2.4V ~ 3.6V (for 2 batteries application)

3.6V ~ 5.1V (for 3 batteries application)

♦

Built-in regulator for DSP core

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Built-in 16-bit DSP core

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Software-based voice/melody processing

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Rich Function Instruction Set

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16 MIPS CPU performances under 16MHz

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Clock system

−

16MHz crystal or R-C type oscillator

for hi-speed system clock

−

32768HZ crystal oscillator for RTC

and low-speed system clock

♦

Extension bus

−

Standard Byte-mode and Word-Mode

bus interface

−

4 chip select pins for external devices

(such as ROM, Flash, SRAM..etc)

−

Maximum 128M-bit addressing

capability for signal external memory

device

♦

I/O Ports: 36 I/O pins (P1.0~P1.15,

P3.0~P3.15, P4.0~P4.3)

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ROM size: 64K*16 bits

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RAM size: 9k*16 bits (including LCD RAM)

−

5K*16 SRAM size for general purpose

−

4K*16 for LCD display buffer

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Three 8-bit timers with auto-reload function

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Programmable watchdog timer

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LCD control interface

−

Support 1-bit/4-bit LCD data bus for

external LCD driver

−

Share LCD display RAM with internal

SRAM, support 240x120 LCD display

screen

−

H/W support maximum 4 gray-level

LCD display

♦

Built-in 32768 crystal for Real Time Clock

♦

Two voice/melody channels or 4 channels

wave-table melody

♦

Built in Push-Pull direct drive circuit and

fixed current D/A output

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Sampling Rate: 4KHz ~16KHz

♦

Built-in software voice synthesizer for

multiple bit-rate solution

♦

USB 1.1 interface provided

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Low Voltage Detector

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Low Voltage Reset

♦

9 Interrupt Sources

−

5 internal interrupt (T0, T1, T2, RTC and USB)

−

3 external interrupt (P3.0~P3.2)

−

1 DA/Push-Pull output

Ver: 1.4

5

April 18, 2006