1 Reply Latest reply on Feb 8, 2016 1:07 AM by kep_284046

# Multiplication without processor with DFB

This is only a test !

I am waiting for your suggest.

Target: The solution to the situation where the timing is inadequate.

Operation : 16 Bit square operation

Max Value: 0xFFFF

Min Value: 0x0020

Note 0: The first 4 bytes of neglect

Note 1: If you want to reduce the min value, you must reduce the maximum value.

I tried this; X = Y + Z => X^2 = X . Y + X . Z

X = 0xaabb

Y = 0xaa00

Z = 0x00bb

=> X^2 = 0xaabb . 0xaa00 + 0xaabb . 0x00bb

In DFB; I'm doing move for top 24 bits.

X << 7 (shift) => 0x55 5D80

Y << 7 (shift) => 0x55 0000

Z << 15 (shift) => 0x5D 8000

X.Y = 0x38 B017 (Hold A)

X.Z = 0x3E 5B4C (Hold B)

Outside the DFB;

Y1 = 0x38 B017 (Hold A)

Z1 = 0x3E 5B4C (Hold B)

With DMA;

Y1 = 0x38B0 1700 (Memory Map)

Z1 = 0x3E 5B4C X^2 = (Y1 + Z1) * 4

X^2 = 0x38EE 724C * 4 = 0x29 0952 F3E8

• ###### 1. Re: Multiplication without processor with DFB

I forgot to tell.

AC input signals must be converted DC