+2008.12.21
+- for packaging a board to attach to a computer on the ground station side, I
+ have a Hammond box that looks good. Digi-Key part number HM380-ND, $2 in
+ singles.
+
+2009.03.16
+
+- rewire P1_2 to be CS* for the SPI EEPROM instead of accel_st, ground ST pin
+
+- USB connector shouldn't hang over the edge of the board
+- reorder debug connector pinout to match what actually works with cp2103
+- make USB connector a dual footprint to allow remoting using another connector
+ like the one we're using for serial port from the tiny series?
+- change debug header to 5 pins so we can use one board to program another
+ by bringing a gpio over to drive reset? 5-pin connector from tiny series.
+
+2009.04.21
+- Keith would like to use SPI to talk to TelePyro and TeleTerra boards, so
+ we're thinking of giving up an LED to get a second chip select line, and
+ reusing the existing SPI channel to the memory chip. Now, how do we do an
+ input interrupt from the PIC to flesh out a 7-pin connector?
+
+ rename net cs0 to cs_mem to reduce confusion
+ lose second LED attached to CPU, P1_1 becomes cs_ext
+ lose R12 since LED is no longer there
+ add J9, 7 pins, Molex pn footprint=530470710 digikey=WM1736-ND
+ define 'interrupt' as a new net ... now, how to hook it up?
+
+ So the problem is how to multiplex one cc1111 pin to be bidirectional. If
+ the cc1111 asserts that pin, we need the PIC cs input to go low. If the
+ cc1111 isn't asserting it (switched to input), then we want the state of
+ the PIC interrupt output to be reflected there. But how can we drive the
+ cc1111 input while simultaneously knowing when it's being asserted as an
+ output? Doesn't seem possible. How does the Dallas 1-wire stuff work?
+
+2009.05.27
+- based on experiences and discussion at Mile High Mayhem, here's what we
+ think we want to do at the schematic level:
+
+ + known changes for two cuts and jumps and two added resistors
+ + lose the temp sensor
+ + lose the beeper
+ + lose the 4-pin serial port connector
+ + change the debug connector to 4 pins 1.25mm ala deleted serial port
+ + add 7-pin 1.25mm connector that extends SPI for TT/TP and doubles
+ as debug control port for flashing another board with 7-4 pin cable
+ gnd, v_lipo, mo0, mi0, c0, cs1 (ex temp), irq1 (ex beeper)
+ + lose the 1000uF cap
+ + wire v_lipo to the igniter fets directly
+ + include a connector for an external pyro battery
+ + add one or two 1206 caps between +3.3V and gnd to ballast against
+ power switch bounce and/or brown-out on igniter firing:
+
+ DK 490-4512-1-ND is a 100uF 1206 part, 1.32 in 100 pieces
+ DK 445-1428-1-ND is a 47uF 1206 part, 0.91 in 100 pieces
+
+ + add MN5010HS GPS chip, chip antenna, and associated circuitry
+
+ BAS16 is DK BAS16LT3GOSCT-ND, SOT-23-3, 0.05 in 100 pieces
+ BSS138 is DK BSS138LT1GOSCT-ND, SOT-23-3, 0.14 in 100 pieces
+ 33nF cap for antenna is DK 490-1315-1-ND, 0402, 0.03 in 100s
+
+2009.06.01
+- after more thinking about this, I want to add the serial connector back in
+ but as an optionally loaded part ... if I can make it fit.
+
+- can I put the GPS chip antenna on the board *and* allow for an SMA or other
+ connector if we want it off-board?
+
+
+- To Do List
+
+ - add serial connector back to schematic as optionally loaded part
+ - move USB connector on PCB layout 80 mils in from board edge
+ - create PCB footprints for the GPS module and GPS antenna
+