USER MANUAL
V0.904
EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany
Phone +49.89.67 34 689-0
Fax +49.89.67
34
689-50
[email protected]
www.enocean.com
Subject to modifications
STM110C User Manual V0.904
February 18, 2008 2:00 PM
Page 9/40
STM110C
Power control
The power control supervises V_SC1 supply and charging status of the energy store. It con-
trols the power supply for wake-up timer, microprocessor, HF transmitter and the supply
outputs.
Power supply outputs
Two power supply outputs are available:
a)
V_OUT
b)
V_REF (stabilized reference voltage)
The outputs are active after wake-up during the active state of the module to drive an ex-
ternal sensor user circuitry.
Wake-up timer
The wake-up timer provides user-programmable wake-up time intervals for activating the
processor and an external wake-up opportunity (WAKE pins).
Features:
Extremely low power consumption during sleeping time period
Cyclic processor wake-up configurable by user through external pin configuration
(CW_0, CW_1)
The sleep mode can be terminated immediately by changing the pin status of the
differential WAKE inputs. Note that the WAKE inputs are part of a special capacitor
circuitry that offers lowest operating power consumption (current flow at switching
over time only).
WAKE and /WAKE always have to be operated via switch-over as shown in the
following:
Figure 4: External WAKE pin circuit
A radio telegram is always transmitted after wake-up via WAKE pins!
After transmission the counter for redundant retransmission is reset to a random
number in the configured range.
See chapter 2.5 for configuration of wake-up cycle times.
GND
WAKE
WAKE
GND
WAKE
WAKE
