ADSP-2185M

The ADSP-2185M is a single-chip microcomputer optimized for digital signal processing (DSP) and other high-speed numeric processing applications.

The ADSP-2185M combines the ADSP-2100 family base architecture (three computational units, data address generators, and a program sequencer) with two serial ports, a 16-bit internal DMA port, a byte DMA port, a programmable timer, Flag I/O, extensive interrupt capabilities, and on-chip program and data memory. The ADSP-2185M integrates 80K bytes of on-chip memory configured as 16K words (24-bit) of program RAM, and 16K words (16-bit) of data RAM. Power-down circuitry is also provided to meet the low power needs of battery-operated portable equipment. The ADSP-2185M is available in a 100-lead LQFP package and 144 Ball Mini-BGA. In addition, the ADSP-2185M supports new instructions, which include bit manipulations-bit set, bit clear, bit toggle, bit test- new ALU constants, new multiplication instruction (* squared), biased rounding, result-free ALU operations, I/O memory transfers, and global interrupt masking, for increased flexibility. Fabricated in a high-speed, low-power, CMOS process, the ADSP-2185M operates with a 13.3 ns instruction cycle time. Every instruction can execute in a single processor cycle. The ADSP-2185M's flexible architecture and comprehensive instruction set allow the processor to perform multiple operations in parallel. In one processor cycle, the ADSP-2185M can:
• Generate the next program address
• Fetch the next instruction
• Perform one or two data moves
• Update one or two data address pointers
• Perform a computational operation

This takes place while the processor continues to:
• Receive and transmit data through the two serial ports
• Receive and/or transmit data through the internal DMA port
• Receive and/or transmit data through the byte DMA port
• Decrement timer

The EZ-KIT Lite is a hardware/software kit offering a complete evaluation environment for the ADSP-218x family: an ADSP- 2189M-based evaluation board with PC monitor software plus assembler, linker, simulator, and PROM splitter software. The ADSP-2189M EZ-KIT Lite is a low cost, easy to use hardware platform on which you can quickly get started with your DSP software design. The EZ-KIT Lite includes the following features:
• 75 MHz ADSP-2189M
• Full 16-Bit Stereo Audio I/O with AD73322 Codec
• RS-232 Interface
• EZ-ICE Connector for Emulator Control
• DSP Demo Programs
• Evaluation Suite of VisualDSP

The ADSP-218x EZ-ICE® Emulator aids in the hardware debugging of an ADSP-2185M system. The ADSP-2185M integrates on-chip emulation support with a 14-pin ICE-Port interface. This interface provides a simpler target board connection that requires fewer mechanical clearance considerations than other ADSP-2100 Family EZ-ICEs. The ADSP-2185M device need not be removed from the target system when using the EZ-ICE, nor are any adapters needed. Due to the small footprint of the EZ-ICE connector, emulation can be supported in final board designs.
The EZ-ICE performs a full range of functions, including:
• In-target operation
• Up to 20 breakpoints
• Single-step or full-speed operation
• Registers and memory values can be examined and altered
• PC upload and download functions
• Instruction-level emulation of program booting and execution
• Complete assembly and disassembly of instructions
• C source-level debugging

See Designing An EZ-ICE-Compatible Target System in the ADSP-2100 Family EZ-Tools Manual (ADSP-2181 sections) as well as the Designing an EZ-ICE-Compatible System section of this data sheet for the exact specifications of the EZ-ICE target board connector.