From 92dc1825dbc6330bd040f98f6bbd95816dd9da02 Mon Sep 17 00:00:00 2001 From: Luke Kenneth Casson Leighton Date: Sun, 17 Jun 2018 15:39:48 +0100 Subject: [PATCH] add slides --- pinmux/pinmux_chennai_2018.tex | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/pinmux/pinmux_chennai_2018.tex b/pinmux/pinmux_chennai_2018.tex index c4f84618d..2d5bf1787 100644 --- a/pinmux/pinmux_chennai_2018.tex +++ b/pinmux/pinmux_chennai_2018.tex @@ -128,18 +128,20 @@ \end{itemize} } -\frame{\frametitle{Muxer cases to handle} +\frame{\frametitle{Muxer cases to handle (One/Many to One/Many) etc.} \begin{itemize} - \item Many FN outputs to Many Pins: no problem\\ - (weird configuration by end-user, but no damage to ASIC)\vspace{6pt} + \item One FN outputs to Many Pins: no problem\\ + (weird configuration by end-user, but no damage to ASIC) \item One Pin to Many FN inputs: no problem\\ - (weird configuration by end-user, but no damage to ASIC)\vspace{6pt} + (weird configuration by end-user, but no damage to ASIC) \item Many Pins to One FN input: {\bf Priority Mux needed}\\ - No priority mux: Pin1 = HI, Pin0 = LO, ASIC is damaged\vspace{6pt} + No priority mux: Pin1 = HI, Pin0 = LO, ASIC is damaged + \item Many FN outputs simultaneously to one Pin: {\bf does not occur}\\ + (not desirable and not possible, as part of the pinmux design) \item Some FNs (I2C\_SDA, SD\_D0..3) are I/O Buses\\ Bi-directional control of the Pin must be handed to the - FN\vspace{6pt} + FN \item Nice to have: Bus sets pintype, signal strength etc.\\ e.g. selecting SD/MMC doesn't need manual pin-config.\\ \bf{caveat: get that wrong and the ASIC can't be sold} -- 2.30.2