ADSP-21991 is a mixed signal DSP controller released by Analog Devices. It has a 16-bit fixed-point DSP core with a maximum operating frequency of 160 MHz, and 40K words of RAM, which can be configured as 32K words of 24-bit program RAM and 8K words of 16-bit data RAM. It also has an external memory interface, a dedicated memory DMA controller, a programmable PLL, and a flexible clock generation circuit, which supports full-speed operation from low-speed input clocks. It also has an IEEE JTAG standard 1149.1 test access port, which supports on-chip emulation and system debugging.
The ADSP-21991 is a mixed signal DSP controller based on the ADSP-219x DSP Core, designed for high-performance industrial motor control and signal processing applications. It integrates a 16-bit fixed-point DSP core with up to 160 MIPS sustained performance and 40K words of on-chip RAM configured as 32K words of program RAM and 8K words of data RAM.
The device includes a comprehensive set of embedded control peripherals, including an 8-channel 14-bit Analog-to-Digital Converter (ADC), a PWM generation unit, an Encoder Interface Unit, and various communication ports like SPI and SPORT. Fabricated in a high-speed, low-power CMOS process, it operates with a 6.25 ns instruction cycle time at a 160 MHz core clock rate.
| DSP Core | 16-Bit, Fixed Point |
|---|---|
| Sustained Performance | up to 160 MIPS |
| On-Chip RAM | 40K Words |
| Program RAM | 32K Words (24-Bit) |
| Data RAM | 8K Words (16-Bit) |
| ADC Channels | 8-Channel |
| ADC Sampling Rate | up to 20 MSPS |
| Core Clock Rate | 160 MHz |
| Instruction Cycle Time | 6.25 ns |
| Operating Temperature | -40ºC to +85ºC |
| Package | 196-Ball Mini-BGA or 176-Lead LQFP |
The device provides up to 160 MIPS sustained performance.
The device operates within a temperature range of –40ºC to +85ºC.
The instruction cycle time is 6.25 ns for a 160 MHz CCLK.