From 1a04c97f7d6b2ad17a5807d2be17986dae544602 Mon Sep 17 00:00:00 2001 From: emard Date: Thu, 21 Feb 2019 13:38:52 +0100 Subject: [PATCH] manual update --- doc/MANUAL.md | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/doc/MANUAL.md b/doc/MANUAL.md index e7f17d0..e1f9bed 100644 --- a/doc/MANUAL.md +++ b/doc/MANUAL.md @@ -126,6 +126,16 @@ There is SHUTDOWN pin where FPGA can turn OFF the board. This pin is not correctly routed on PCB v1.7 and needs hardware upgrade to make it work. +When board is ready to accept SHUTDOWN signal, LED D11 +(found on back side of the board near J1 pin 22) should +be very dimly lit, visible in the dark. +While D11 is dimly lit, power down +board by setting SHUTDOWN signal to 1 +(or shortly and carefully connect 1k resistor between SHUTDOWN pin of R13 +and 3.3V). +When RTC ALARM is triggered, board should turn ON and D11 should be OFF +indicating board can't enter SHUTDOWN until RTC ALARM flag is cleared. + On J2 connector there are 2 pins for 5V external power input and output. They are located on top right, near pin labeled 27 and US2 connector. Power is unidirectionaly routed using schottky