One Channel Speech Controller
SNC15030
4.
Block Diagram
ROM
Program/Speech
64K×12 bits
Address Pointers/ STACK
SRAM (64 nibbles)
Timer
ALU
IO port 2
Timing
Generator
OSC
Sampling Rate Counter
Watch Dog
Timer
PWM
Circuit
Voice
Synthesizer
IO port 5
5. FUNCTION DESCRIPTIONS
5.1 Oscillator
SNC15030 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
VCC
OSC
RC Oscillator
!
5.2 ROM
SNC15030 contains a substantial 64K words (12-bit) internal ROM, which is shared by
program and resource data. Program, voice and data are shared within this same 64K
words ROM.
Ver: 1.5
4
October 30, 2008