Re: SPI slave select signals

praveen.kantharajapura@xxxxxxxxx wrote:
> Hi all,
>
> In an SPI interface i have got 4 slaves and one master
> What i wanted to know is wether the master can assert two slave
> selects(SS_N) simultaneously OR is there a restriction that master can
> assert only one slave select.

Depends on the design of the master. The NIOS II used in the Altera
FPGA permits me to asers any number of the SPI select lines.

But also as has been pointed out if the slaves all try to respond with
data you've got problems on the SOMI singal line.

gm

.

Relevant Pages

  • Re: [RFC/PATCH 0/22] W1: sysfs, lifetime and other fixes
    ... defined in family driver. ... Bus master driver - is like NIC driver, it does not know about the rest ... It has it's logical slaves, it has it's own attributes and features, ... This is wrong - netlink notification is used and will be moved to ...
    (Linux-Kernel)
  • Re: tcl and threads: installing and other info
    ... So I'd like to parallelise the notification processing. ... a event based master process using ... more stable in case one of the slaves crashes or does nasty things. ... If you don't have enough memory for the database to do its ...
    (comp.lang.tcl)
  • Re: [RFC/PATCH 0/22] W1: sysfs, lifetime and other fixes
    ... > Why do you need separate files? ... >> link between private data and master and set useable master's name. ... but slave count and slaves attributes itself requires that mutex. ... >> structure and have family drivers create necessary attributes ...
    (Linux-Kernel)
  • Re: Conversion of RS232 serial data from Fire Alarm to MODBUS
    ... Master kept showing "Invalid response from Slave" and "Message Time ... are usually the channel out from the master to all of the slaves. ... In RS485 2 wire you devise a mechanism to change the direction of the line ... the master to tell the master computer line driver whether the ...
    (sci.engr.control)
  • Re: Empirically Measuring Mutualism In Man
    ... >>> whether its counterpart was another instance of the Southampton ... >>> form a master slave relationship, where the slave sacrifice's itself for the ... >>> of the slaves agents to the bottom of the score list. ... The Southampton strategy works through a sort of kin selection ...
    (sci.bio.evolution)