Intermediate updates of schematics.

Add questions-12-27-2015

git-svn-id: https://svn.code.sf.net/p/freetel/code@2577 01035d8c-6547-0410-b346-abe4f91aad63

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+Questions for Dave\r
+12/27/15\r
+\r
+       1. 4 Status LEDS Pg 1?\r
+       2. Led power on indicator? Pg 1\r
+       3. Select & Back Switches? Pg1\r
+       4. Usart 3 pullups? Pg 1\r
+       5. Boot1 pulldown? Pg 1\r
+       6. Stlink Conn & SIgs? Pg1\r
+       7. Self Test jmpr & pullup? Pg1\r
+       8. Reset Switch, pullup& cap? Pg1\r
+       9. STM32F4907 power section OK? Pg1\r
+       10. CPU AIN1 & 2 ? Pg1\r
+       11. CPU DAC1(2)? others? Pg1\r
+       12. Test points? Where & type? PG1 & 2\r
+       13. Ext SPI & I2c I/O?\r
+       14. I2c to Si570 & SI 5351?\r
+       15. 8 MHz osc(CPU)? Pg1\r
+       16. Uart 3.3V I/O pullups?\r
+       17. Same USP OTG Interface? Pg1\r
+       18. EEPROM chip & interface? PG1\r
+       19. Review Voltage regulators? Pg2  What is Vgg?\r
+       20. Int/Ext MIC interface, same? Pg2\r
+       21. Speaker? Amp? Ext SPKR & COnn? Pg2\r
+       22. Same Vdd -> AVdd filtering? Pg2\r
+       23. Start with 160mm x 100mm PCB? 4 layers?\r
+       24. Same power input jack? Pg2\r
+       25. Ext PTT input? isolated? Pg2\r
+       26. Jumper blocks 2 x 2? where? PG 3 & 4\r
+       27. Scope probe footprints? Where?\r
+\r
+\r
+Power Dissipation?\r
+1.568W xls sht. 33.38W in regulators. Eliminate 9V regulator? power still high.\r
+FIltering on +12V input. Limit input to 12V - 14V? 13.8V in shack or mobile, 12V PS common?  difficult to accomodate wider range.\r