68300

Sudha,

The QSPI is capable of performing an 8-bit transfer like the one you 
describe. 

First, make sure you set up the corresponding byte in the command RAM 
correctly:
CONT = 0 to insure peripheral is deselected after transfer,
BITSE = 0 to exchange only 8 bits, 
PCSn = specific to your desired chip select.  (For "automatic" CS 
assertion->negation)

Don't forget to set NEWQP and ENDQP (in SPCR2) to the same address as the 
byte you want to send, and you should be all set.

Jeff





"sudha srinivasan" <sudha_sri@...>
10/15/2003 11:54 PM
Please respond to 68300

 
        To:     "68332 \(E-mail\)" <68300@yahoogroups.com>
        cc: 
        Subject:        [68300] QSPI of M68332


Dear all,

Does the SPI bus automatically assert the chip select(CS/) if one byte has
to be transmitted to an external device?
In other words,  Is it enough if we just enable the SPE bit in the SPCR1
register to transmit one byte of data which means that
the setting of SPE bit will select the chip and deselect as soon as one 
byte
is transmitted.


Kindly respond,
Sudha



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