The ADSP-217x is a DSP microcomputer that combines the ADSP-2100 base architecture with new instructions for increased flexibility. It features two serial ports, a host interface port, a programmable timer, extensive interrupt capabilities, and on-chip program and data memory. The ADSP-217x also supports bit manipulations, new ALU constants, a new multiplication instruction, biased rounding, and global interrupt masking. It includes a Bus Grant Hang Logic (BGH) feature and is suitable for battery-operated portable equipment.