Manufacturing and Test Log

jGPS Version 3:

Brought up board #1!
BUG: C77 should go from U14 MIC5319-1.8V BYP to GND, not Vout. I blame society.
BUG: C77 should be 100n, not 10n
BUG: C76 should be 2.2uF, not 1.0uF
BUG: U13 should be a XC2C64A not a XC2C32A.
BUG: R24 should be 1k (or 390 ohm based on datasheet reference schematic)
BUG: R21 should be 33k
FUTURE: Ground clip pads should be bigger, what about a ring around the whole board.
FUTURE: FTDI cable or similar connector for COTS chip so we can program it directly from a PC.
FUTURE: jumper to hold the STM in reset.
FUTURE: zero ohm resistors (or cutable enable lines) in each power supply so we can shut them off if we want to.
FUTURE: STM should be able to reset the Venus IC.
FUTURE: STM or jumper should control Venus BOOT_SEL.
FUTURE: STM should be able to power down the Venus or Max.

Initial bring up
R38/R39/R40 TOTALLY WRONG - LED way to bright
MODWIRE: U2 (STM32) PE2 (pin 1, also TP1) to U3 (PHY chip) pin 23 (LED0) in order to engage PHY chip's debug features
FIXED: Misunderstood PHY error, so made Kenney reflow U3 (PHY) for no reason.
FOUND: PCB mfg error right at pad of pin 12 (RXD1) on U3 (PHY). Trace was "pinched off", NC to pad.
- FIXED: Kenney scraped back solder mask and added short mod wire to bridge pad and trace.
MODWIRE: U2 (STM32) PB10 (pin 47) to U1 (MAX) pin 9 (SCLK), also cut trace between 0.1 holes.
MODWIRE: U2 (STM32) PB15 (pin 54) to U1 (MAX) pin 8 (SDATA), also cut trace between 0.1 holes.

Board #1 (out of 3) stuffed on ~ 2014/05/20 by Jenner.
- LNA not stuffed: U5, L2, L5
Configuration:
- C24 (sch:down/brd:left), C22 (sch:down/brd:left), C19 (sch:left/brd:left), which is the "straight through to LNA1 configuration"
- LNA