Re: Serial Device Interface

Ed Casas (edc@ece.ubc.ca) Thu, 13 Apr 2000 22:50:21 -0700 

Date: Thu, 13 Apr 2000 22:50:21 -0700
From: Ed Casas <edc@ece.ubc.ca>
Subject: Re: Serial Device Interface



On Thu, Apr 13, 2000 at 08:34:06PM -0700, Duncan Chou wrote:
> 
> 1. What type of sequential logic devices will be used to implement
>    the serial interface which is used to connect peripheral chips
>    such as serial EEPROMs?

A shift register.

> 2. For memory design, what is the 'byte-select' bit used in the
>    byte-select address line?

On a general-purpose CPU that has a multi-byte data bus the
byte-select bit(s) from the address bus are used (internally) to
select specific byte(s) from the data bus.  A typical example is
the 386SX which uses A0 internally to generate BHE* and BLE*.

-- 
Ed Casas   edc@ece.ubc.ca   http://casas.ece.ubc.ca   +1 604 822-2592