Introduction

The ST18952 chip includes the SGS-Thomson D950 16-bit fixed point digital signal processor core, 16.5 Kwords of data memory, 32 Kwords of program memory, and the following on-chip peripherals:

• Interrupt controller (ITC)

• DMA controller (DMA)

• Bus switch unit (BSU)

• Synchronous input/output (SIO)

• Timer (TIM)

• Emulation unit (EMU)

• Tap controller (TAP)

It also includes an oscillator and a PLL for generation of the D950Core clock.

■ Programmable D950 Core

■ Data calculation unit

■ Address calculation unit

■ Program control unit

■ Fast and flexible buses

■ 66MIPS - 15 ns instruction cycle time

■ 16.5 Kwords data memory (RAM)

■ 32 Kwords program memory (RA42 1714 01)

■ Interrupt controller

■ DMA controller

■ Serial input/output

■ Timer

■ Bus switch unit

■ Emulation unit

■ JTAG IEEE 1149.1 test access port