Surround Processor 3 - Inter-m CA-8320 Service Manual

SURROUND PROCESSOR 3

OUTLINE
YSS220(SP3) is an LSI which has surround capability by digital audio technology. The LSI has built-in A/D,
D/A converters which enable digital sound processing for analog signals. With a 256k pseudo SRAM or
SRAM connected, the LSI can process digital delay up to 512ms.
FEATURES
- Built-in 15-bit floating ADC (L, R 2 channels) and DAC (FL, FR, RL, RR4 channels) enable digital
processing for analog signals with 32kHz internal sampling frequency.
- 4 channels except center output can output digital signals as well. With a DAC connected externally, it will
be possible with up to 5 channels (FL, C, FR, RL, RR).
- Hi-performance surround by mixing many echoes with using up to 512ms digital delay.
- Preset mode for easy control by terminal setting.
- Register control mode where it is possible to set various coefficients using microprocessor serial
interface for original sound processing.
- Internal DSP is a 24-bit x 13-bit high speed multiplier with 128 steps.
- One 256k (32k x 8) pseudo SRAM or SRAM to be connected.
- 12.288MHz (384fs) master clock.
- 5V single power supply, Si-gate CMOS process.
- 64-pin plastic QFP (YSS220-F)
Note: Due to the nature of the product, the preset data cannot be disclosed although partially.
2
PIN DESCRIPTION
3