SNC82340

12-Channel MIDI/Speech Controller

Ver: 1.6

Sep.8, 2006

5

4 Block Diagram

5 FUNCTION DESCRIPTION

5.1.

Oscillator

CKSEL (Clock Select) input pin of the SNC82340 selects between crystal

oscillator/ceramic resonator or RC type oscillators as system clock.

16.384Mhz

XIN

CKS EL

XO UT

RC Os cilla tor

Crys ta l / Re s ona tor

VDD

XIN

CKS E L

XO UT

20pf

20pf

G ND

NC

NC

Notice: For RC Oscillator, Keep XOUT and XIN as “No Connect”.

ROM

Program/Speech/Melody/Instrument waveform

1M

12 bits

OSC

Address Pointers/ STACK

IO2

Voice

Synthesizer

ALU

SRAM (384 bytes)

10bit D/A

Timing

Generator

IO1

IO0

Sampling

Rate Counter

Timer

Direct Drive