Texas Instruments MSP430x1xx manual Hardware Multiplier Introduction

Hardware Multiplier Introduction

7.1 Hardware Multiplier Introduction

The hardware multiplier is a peripheral and is not part of the MSP430 CPU. This means, its activities do not interfere with the CPU activities. The multiplier registers are peripheral registers that are loaded and read with CPU instructions.

The hardware multiplier supports:

-Unsigned multiply

-Signed multiply

-Unsigned multiply accumulate

-Signed multiply accumulate

-16 ⋅ 16 bits, 16 ⋅ 8 bits, 8 ⋅ 16 bits, 8 ⋅ 8 bits

The hardware multiplier block diagram is shown in Figure 7−1.

Figure 7−1. Hardware Multiplier Block Diagram

15 rw0

MPY 130h

MPYS 132h

MAC 134h

MACS 136h

Accessible

Register

MPY = 0000 MACS MPYS

MAC

Multiplexer

SUMEXT 13Eh C

15r0

	15	rw	0
	OP1	OP2 138h
	16 x 16 Multipiler
		32−bit Adder
	MPY, MPYS	MAC, MACS
	32−bit Multiplexer
S	RESHI 13Ch	RESLO 13Ah
31	rw	rw	0

7-2 Hardware Multiplier