Specifications

Power Interface
Rev 2.0 Apr.10 Proprietary and Confidential 35
Modes
Transmit and Receive modes
Current consumption in transmit or receive mode (in a call or data connection) is
affected by several factors, such as:
• Radio band being used
• Transmit power
• Receive gain settings
• Data rate
• Number of active Transmit time slots (for transmit mode)
Sleep mode
Sleep mode is the normal state of the module between calls or data connections.
In this reduced power mode, the module cycles between wake (polling the
network) and sleep, at an interval determined by the network provider.
Deep sleep
Deep sleep mode is a reduced power, out-of-network-coverage mode, that the
module enters when it cannot acquire network service after several minutes.
The module then exits deep sleep periodically to try to acquire service, and if
successful, attempts to register.
Shutdown mode
While in shutdown mode, the module is powered off, but still draws a minimal
current from the host power supply.
SED (Smart Error Detection)
(MC8xxx only)
The MC8xxx modules use a form of SED to track recurrent premature modem
resets. In such cases, the module automatically forces a pause in boot-and-hold
mode at power-on to accept an expected firmware download to resolve the
problem.
The SED process is implemented as follows:
• The module tracks consecutive resets within 30 seconds of power-on.
• After a third consecutive reset occurs, the module automatically waits up to
30 seconds in boot-and-hold mode, waiting for a firmware download to
resolve the power-cycle problem.
• If no firmware download begins within 30 seconds, the module continues to
power-on.
• If the module resets again within 30 seconds of power-on, it again waits in
boot-and-hold mode.