Compal Electronics Inc PICONODE Manual De Usuario
PicoNode Integration Specification
21
6 Power States
Compal can provide partners with tools to accurately predict battery life for their particular
application. We recommend that partners use these tools. This section is provided for reference
only.
application. We recommend that partners use these tools. This section is provided for reference
only.
The picoNode has a number of states it runs through during its various operating modes.
General comments:
The picoNode accepts a wide input voltage range (2.5 V – 5.5 V on VBATT).
The picoNode has low drop out (LDO) regulators that will operate 100% of the time the
picoNode is powered (ON_OFF signal set to high).
picoNode is powered (ON_OFF signal set to high).
The picoNode requires either a fixed or switched 3.3 V supply on its 3V3 pin.
The picoNode always tries to minimize its power consumption but is largely driven by network
operating states and modes of operation. This document does not describe all of the modes in
detail but, in general, there are two main operating modes for the picoNode:
operating states and modes of operation. This document does not describe all of the modes in
detail but, in general, there are two main operating modes for the picoNode:
1. Continuous Mode
In this mode, the picoNode is ON (awake) at least 50% of the time (100% of its RX cycle).
The picoNode starts up, searches for the network, locks on, and Joins. In this mode, the
picoNode is nominally in RX or TX mode (radio is ON and in a high power consumption
state), or in an Idle state where the clocks and CPU are ON but the radio is OFF (moderately
low power mode). The continuous mode is usually for applications where the Host and
picoNode are AC-powered and system current consumption is not an issue.
The picoNode starts up, searches for the network, locks on, and Joins. In this mode, the
picoNode is nominally in RX or TX mode (radio is ON and in a high power consumption
state), or in an Idle state where the clocks and CPU are ON but the radio is OFF (moderately
low power mode). The continuous mode is usually for applications where the Host and
picoNode are AC-powered and system current consumption is not an issue.
2. Slotted Mode
This mode has the picoNode falling into a Deep Sleep state—the lowest power state of the
picoNode. In this mode, the picoNode is mostly powered down except for a couple of low
power LDO Regulators. The picoNode can sleep for hours at a time if the network is
configured to allow this.
picoNode. In this mode, the picoNode is mostly powered down except for a couple of low
power LDO Regulators. The picoNode can sleep for hours at a time if the network is
configured to allow this.
The power states are described in the following sections.
6.1 Operating States
This section describes the various operating states within the operational modes.
6.1.1 Power Off State
When the picoNode is totally non-functional, the Host can set the ON_OFF signal Low to
deactivate the circuitry of the picoNode. This should NOT be confused with Deep Sleep states
where the picoNode mostly sleeps yet maintains key network timers to wake up synchronously
with network activity. If awakened from the Power Off state, the picoNode must go through a
very power-hungry search/acquisition algorithm to re-acquire the RPMA Network.
deactivate the circuitry of the picoNode. This should NOT be confused with Deep Sleep states
where the picoNode mostly sleeps yet maintains key network timers to wake up synchronously
with network activity. If awakened from the Power Off state, the picoNode must go through a
very power-hungry search/acquisition algorithm to re-acquire the RPMA Network.