UM-B-049
DA14585/DA14586 Getting Started Guide with the PRO-Development Kit
User Manual
Revision 2.1
21-09-2018
CFR0012-00 Rev 2
27 of 30
© 2018 Dialog Semiconductor
Figure 32: FTDI Latency Timer
10.3
Appendix C: Battery Connection ‘Workaround’
There is a small hardware malfunction; when the board operates on battery (J11 jumper on 2-3), the
RST signal is permanently high.
When USB is disconnected, T_RESET becomes low and the invertor U7 RST is high. This prevents
the board from operating.
The workaround is to dismount R84, see
Figure 33
.
Figure 33: Reset Circuitry to Dismount R84
