SNC15020 Datasheet, PDF (4/10 Pages) SONiX Technology Company – One Channel Speech Controller

4. Block Diagram
SNC15020
One Channel Speech Controller
ROM
Program/Speech
44K×12 bits
Address Pointers/ STACK
Timing
Generator
OSC
SRAM (64 nibbles) _{Sampling Rate Counter Watch Dog}
Timer
Timer
ALU
Voice
Synthesizer
PWM
Circuit
IO port 2
IO port 5
5. FUNCTION DESCRIPTIONS
5.1 Oscillator
SNC15020 accepts RC type oscillator for system clock. The typical circuit diagram for
oscillator is listed as follows.
OSC
VCC
RC Oscillator
!
5.2 ROM
SNC15020 contains a substantial 44K words (12-bit) internal ROM, which is shared by
program and resource data. Program, voice and data are shared within this same 44K
words ROM.
Ver: 1.5
4
October 30, 2008