One Channel Speech Controller
SNC15300
4.
Block Diagram
ROM
Program/Speech
608K×12 bits
Address Pointers/ STACK
SRAM (128 nibbles)
Timer
ALU
IO port 1
IO port 2
Timing
Generator
OSC
Sampling Rate Counter
Watch Dog
Timer
PWM
Circuit
IO port 5
Voice
Synthesizer
IO port 4
5. FUNCTION DESCRIPTIONS
5.1 Oscillator
SNC15300 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
VCC
OSC
RC Oscillator
!
5.2 ROM
SNC15300 contains a substantial 608K words (12-bit) internal ROM, which is shared
by program and resource data. Program, voice and data are shared within this same
608K words ROM.
Ver: 1.5
4
October 30, 2008