lpcware

SSP: SSP-Slave, when does MISO go to Z?

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by capiman on Sat Jan 24 03:04:20 MST 2015
Hello,

taken the case, that I want to use one SSP master and multiple SSP slaves
and LPC43xx is one of the slave. Each slave has it own CS line.

What is the criteria for SSP slave to put its MISO line to Z (tristate),
so other SSP slaves (like a serial flash) can work without interfering with LPC43xx?
Is it SSEL of SSP slave, which put MISO to Z?

Or must I do this by my own by? So when I detect my CS going low/high,
then I enable/disable MISO?

Or does LPC43xx not support this by itself and external hardware is needed to do this kind of multiplexing?

Best regards,

Martin

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