54 Functional Description TB8100 Installation and Operation Manual
© Tait Electronics Limited June 2005
4.6 Data, Control and Monitoring Paths
This section describes the types of data and the methods used to move the
data around a TB8100 BSS. Refer to Figure 4.13 on page 71 for more
information.
The reciter RISC is the central command and control entity in a base station
system. As such it will often command modules to change state, based on
the information received in a module poll message reply. Messages from the
reciter over the I
2
C bus can control actions in the PA and PMU hardware,
such as changing Hysteresis mode in the PMU based on the current status
of any active power cycling modes, or reading the ambient temperature via
the PA module.
Table 4.2 PMU indicator LED states
Green Red PMU condition
off off power off (input above or below safe operating range)
flashing
(3Hz)
off no application firmware loaded; use the Service Kit software to
download the firmware
on off the microcontroller is operating; no alarm detected
on flashing
(3Hz)
one or more alarm conditions detected:
■ output is overvoltage
■ output is undervoltage
■ output is current-limiting
■ overtemperature
■ mains failure
■ battery voltage is low
■ battery voltage is high
■ shutdown is imminent
■ DC converter is faulty
■ battery is faulty, or DC converter is switched off
■ auxiliary power supply is faulty
■ PMU is not calibrated
■ self-test has failed
■ PMU is not configured
flashing
(on 300ms,
off 2700ms)
flashing
(on 300ms,
off 2700ms)
PMU is in battery protection mode
flashing
(on 300ms,
off 4700ms)
flashing
(on 300ms,
off 4700ms)
PMU is in Deep Sleep mode
flashing
(3Hz)
flashing
(3Hz)
Service Kit LED test - LEDs flash alternately
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