USER GUIDE ƖEM8500 SERIES
Copyright 2016, EM Microelectronic-Marin SA
EMEVB8500-MN01, Version 2.0, 5-Jul-16
www.emmicroelectronic.com
420005-A01, 3.0
4.2.5 S1 terminaL and HRV
An external harvester can beconnected to the S1 screw block terminal. To connect the external harvester
to the VDD_HRV pin of the EM8500 (VDD_SOL pin of the EM8502), a jumper must be placed on J1.
Figure 4-2: EMEVB8500 HRV & S1 View
Notes:
(1) There is no default on-board harvester available.
(2) Observe polarity when connecting the input external harvester. Reverse polarity generates
high leakage current across the EM8500 series ESD protection diode connected to VSS.
4.2.6 S2 terminal and LTS
The external Long Term Storage can be connected to the S2 screw block terminal. To connect the
external Long Term Storage to the VDD_LTS pin of the EM8500 series, a jumper must be placed on J2A
(Jumper on J2B must be removed).
Figure 4-3: EMEVB8500 LTS, S2 & K2 View
Notes:
(1) A default on board LTS capacitor C7 (10uF) is connected on VDD_LTS. This capacitor cannot be
disconnected except by physically removing it.
(2) When using the on-board Supercap (SC) as Long Term Storage a jumper on J2B must be placed
(Jumper on J2A must be removed).
(3) A dedicated Supercap discharge circuit is available on board. To ensure that the on board Supercap
is correctly discharged, keep button K2 pressed for at least 15 seconds.
(4) Observe polarity when connecting the external Long Term Storage. Reverse polarity
generates high leakage across the EM8500 series ESD protection diode connected to VSS
and may damage the LTS. When using a battery, do not connect battery with reversed
polarity.
