Rev200 mods

• PF Top Nav; PCB; Hardware; Assembly PFCmdMenu iochan
• PCA : SC/MC 218 FET 217 IMU219 Swiffy Rev200_mods
• PFCMD : SC; MC; PFCMD_PY; Pf_calb_table_py; Virtual spring test; PF1_Code_History; PF EEPROM
• SERIES: S01 S02 S03 wow_left wow_right

PCB needed Revisions

• debug documentation should should show all TP pads, and not be the mirror image.
• KS - need to adjust PCB outlines
• height of coin cells is too great. need the original coin cell spec

current sensors

• presently 5V current sensor becomes 3.283V, but ADC reference is 3.0V so of the 75.76A range (0->5V), only 69.23A are viable. Thus range is -37.88A to +31.34A. The scale factor is 65536 / (5/.066 * 3/(5*10/15.23)) = 946.6789

FET

• w/clamp circuit - use thermal vias for R4 - this device is impossible to replace
  • will try low temp solder and send to MPD

• populate coin charger as default with 6.3V target voltage (R=1.21meg). If non-rechargeable cells are installed, DNP the connecting resistor. (pg 4/8)

• way to measure coin cell voltage without charger enabled? Connect pin 3 of U10 to something like the SFTYSNS_EN, or MTR_EN signal at TP97 or U20B

• change D13 to diode that actually has 200mV drop @ 1uA. BAS116-F-7 appears to have 427mV @ 0.3uA

SCMC

• change cutoff freq to ~15Khz for temp circuit (U22) R102=1k, C73=0.01u

• pg 7/18 : remove R232 - 10k for batt_temp_mon pullup
• pg 7/18 : remove R245 - 220 ohm for mtr_temp_mon pullup

• pg 7/18 : R206, R216 -> 6.66k to scale range 0-5V to 0-3.0V (current sensors)
• pg 7/18 : bridge current sensor use same values phase U,V

• Pg 8/18 : increase size of resisters (by 10x) for supply voltage measurement (R91, R94, R221, R88). Keep cut off freq the same.

• pg 8/18 : populate so measurement of supply voltage is default (R222, R233 installed). its easier to remove components than to add them.

• pg 14/18 : Add DNP 1k? to the TP252 node that connects to the new previous linear spring connector

• pg 3/18 : replace 1.25mm header for EC30 enc/hall w/ 12x0.8mm header
  • [12x8 pinout]
  • interface cable
• replace hall_c input with SSI_CLK 5V output

• need to determine the accuracy of the RTC. Seems to be drifting.

• need to workout : linear spring input to be used for some other 0-3V analog signal inputs. Would like AGND, Analog 3V reference, Analog 5V, and a pair of analog inputs.
  • Battery temp, and previous linear spring.
  • Add zero ohm, DNP at TP252 and route to linear spring input

• locate IMU header for easy access. possibly rot180 - or move 2mm away from edge.
  • KS - lower position. CB in V2 appears to be much more space in the shell

IMU

• probably want to upgrade dual axis IMU
• battery measurement circuit needs to be re-done.