17
edits
Changes
Jump to navigation
Jump to search
Added IC Table and began to populate, added image with U ref designators assigned
==Peripheral attachment points==
==== LED's and Buttons ====
* Button = PC8* LED_Y = PC7* LED_G = PC6* LED_R = PB12
==== GPS ====
* PA3(RX) = GPS TXD* PA2(TX) = GPS RXD
==== UART via USB Port ====
* PA9(TX) = USB D+* PA10(RX) = USB D-
==== Si4063 ====
* PB2 = CS/nSEL* PA7 = SDI* PA6 = SDO* PA5 = SCLK
== Identified Supplementary IC's ==
'''V719''' = [https://www.mouser.com/datasheet/2/389/stg719-1850635.pdf STG719STR Low Voltage 4 Ohm SPDT Switch]
'''636EE''' = [https://www.mouser.com/datasheet/2/427/dg636e-1766306.pdf DG636EEQ Siliconix/Vishay Dual SPDT Switch]
'''LW053A''' = [https://www.ti.com/lit/ds/symlink/sn74lv4053a.pdf Triple 2 Channel Analog Multiplex/Demultiplexer] <br />{| class="wikitable"|+!Ref Desig(s)!Manufacturer!Part Number!Description!Part Marking!Datasheet|-|U1|STMicroelectronics|STM32F100R8T6B|ARM MCU, 24MHz, 8KB RAM, 64KB Flash||[https://www.mouser.com/datasheet/2/389/stm32f100cb-1851080.pdf Mouser]|-|U2, U3, U4, U5, U7|ST|STG719|STG719STR Low Voltage 4 Ohm SPDT Switch|V719|[https://www.mouser.com/datasheet/2/389/stg719-1850635.pdf Mouser]|-|U6|Vishay|DG636E|0.3 pC Charge Injection, 100 pA LeakageCMOS ± 5 V / 5 V / 3 V Dual SPDT Analog Switch|636EE|[https://www.mouser.com/datasheet/2/427/dg636e-1766306.pdf Mouser]|-|U7|Texas Instruments|SN74LV4053A|Triple 2-Channel Analog Multiplexer/Demultiplexer|LW053A|[https://www.ti.com/lit/ds/symlink/sn74lv4053a.pdf Texas Instruments]|-|U8|Texas Instruments|LMV761|Low Voltage Precision Comparator with Push/Pull Output|C22A|[https://www.ti.com/lit/ds/symlink/lmv762.pdf Texas Instruments]|-|U9||||||-|U10||||||-|U11||||||-|U12||||||-|U13||||||-|U14||||||-|U15||||||-|U16||||||-|U17||||||}<br />
==Photos==
File:Stalk pinout mapping.png|Mapping of the pins on the sensor stalk to the connector and their corresponding IC/IO lines. '''''<u>Top of sensor stalk corresponds to bottom of pictured connector!</u>'''''
File:Dfm back pcb no battery.jpg|Back of the DFM PCB without CR123A battery holders
File:DFM-17 Uref overlay.jpg|alt=PCB with reference designators|Top of PCB with U(*) Reference Designators overlaid ICs
</gallery>
