Revision 614ce7a7
Added by Kévin Redon over 4 years ago
| hardware/kicad/SIMtrace.sch | ||
|---|---|---|
| 321 | 321 |
F 1 "100K" H 9300 6000 50 0000 C CNN |
| 322 | 322 |
F 2 "SM0603" H 9450 6000 60 0001 C CNN |
| 323 | 323 |
F 3 "" H 9450 6000 60 0001 C CNN |
| 324 |
F 4 "DNP" H 9300 5900 50 0000 C CNN "Place" |
|
| 325 |
F 5 "R20 and R21 already pull VCC_PHONE low" H 9450 6000 50 0001 C CNN "Note" |
|
| 324 | 326 |
1 9450 6000 |
| 325 | 327 |
1 0 0 -1 |
| 326 | 328 |
$EndComp |
Also available in: Unified diff
schematic: mark R19 as dot no place
R19 pulls VCC_PHONE low for better power on detection.
but the voltage divider R20 + R21 also pull this line low using
a stronger pull down resistor ok 20 kOhm.
thus R19 is unnecessary-
this change has been tested with a real simtrace device.
trace and card emulation worked with a Nokia 3310.
Change-Id: I0dd2025a8634f0ec38060cfbaae68618a4198fca