HT98R068-1 Two-way Radio OTP MCU
IDLE M ode
When the audio processor is not processing data, entering this mode can save power,
however the quantity depends on the actual practical situation. The device provides many
ways to enter the idle mode (see to the datasheet). Here we use the simplest method.
The I/O CMD-51h can control the audio processor operation-stop/operate: FAh/F8h. Note
that it must be separated into two parts of commands. Stop the audio processor by using
an F8h
FAh
DAh sequence while operating by using DAh
FAh
F8h. Disable
the audio processor clock when no event is happening, then use the MCU to detect the
external signals, and enable the audio processor after the signal is identified as shown
below.
IDLE Mode Setup Flow
Flow description:
When there is no output or input signal are waiting to be processed, the audio
processor can be disabled. After it’s enabled, operating can be restarted without
needing re-initialise.
<81E3F>: Enable the audio circuit power supply or select to enable the needed circuit
only.
<851FA>: Enable the audio processor pulse frequency first stage switch.
<851F8>: Enable the audio processor pulse frequency second stage switch.
//
<81EC1>: Disable the audio circuit power supply to lower or turn down unnecessary
power consumption.
<81B93>: Set the input/output line input/output path as common-mode bias voltage to
reduce misunderstanding and reset the receive status.
<851FA>: Disable the audio processor pulse frequency first stage switch.
<851DA>: Disable the audio processor pulse frequency second stage switch.
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