The ADSP-218xN series is a DSP microcontroller released by Analog Devices, Inc. It has 80 MIPS sustained performance and a maximum clock speed of 12.5 ns. The series supports 3-bus architecture, single-cycle instruction execution, single-cycle context switching, multifunctional instructions, low-power standby mode, low-power idle mode, and other features. In addition, the series also supports ADSP-2100 series code compatibility, up to 256K bytes of on-chip RAM, up to 48K words of program memory RAM, up to 56K words of data memory RAM, dual-purpose program memory, independent ALU, multiplier/accumulator, multiplier/accumulator register group, dual-channel DMA controller, etc.
The ADSP-218xN series consists of six single-chip microcomputers optimized for digital signal processing applications. All members are pin-compatible but differentiated by the amount of on-chip SRAM, ranging from 4K to 56K words of data memory and up to 48K words of program RAM.
The architecture combines the ADSP-2100 family base with two serial ports, a 16-bit internal DMA port, and a programmable timer. Fabricated in a high-speed, low-power 0.18 μm CMOS process, these devices operate with a 12.5 ns instruction cycle time at 1.8 V.
| Instruction cycle time @1.8 V (internal) | 12.5 ns |
|---|---|
| Sustained performance | 80 MIPS |
| Process technology | 0.18 μm CMOS |
| Maximum on-chip program memory | 48K words |
| Maximum on-chip data memory | 56K words |
| Available packages | 100-lead LQFP and 144-ball BGA |
The series integrates up to 256K bytes of on-chip memory configured as up to 48K words (24-bit) of program RAM and up to 56K words (16-bit) of data RAM.
The processor contains three independent computational units: the ALU, the multiplier/accumulator (MAC), and the shifter.
Flexible I/O allows operation at 1.8 V, 2.5 V, or 3.3 V.