HMU16

The HMU16/883 is a high speed, low power CMOS 16 x 16-bit parallel multiplier ideal for fast, real time digital signal processing applications. The 16-bit X and Y operands may be independently specified as either two's complement or unsigned magnitude format, thereby, allowing mixed mode multiplication operations.

Additional inputs are provided to accommodate format adjustment and rounding of the 32-bit product HMU16. The Format Adjust control allows the user to select a 31-bit product with the sign bit replicated in the LSP. The round control provides for rounding the most significant portion of the result by adding one to the most significant bit of the LSP.

Two 16-bit Output Registers (MSP and LSP) are provided to hold the most and least significant portions of the result, respectively. These registers may be made transparent for asynchronous operation through the use of the Feedthrough Control (FT). The two halves of the product HMU16 may be routed to a single 16-bit three-state output port via the output multiplexer control, and in addition, the LSP is connected to the Yinput port through a separate three-state buffer.

The HMU16/883 utilizes independent clock signals (CLKX, CLKY, CLKL, CLKM) to latch the input operands and output Product Registers. This configuration maximizes throughput and simplifies bus interfacing. All outputs of the them also offer three-state control for multiplexing onto multi-use system busses.