zfsm-201 California Eastern Laboratories, zfsm-201 Datasheet - Page 5

• Manufacturer Part Number: zfsm-201
• Description: Integrated Transceiver Modules For Zigbee / Ieee 802.15.4 Evaluation Kit Available Zfsm-201-kit-1
• Manufacturer: California Eastern Laboratories

MODES OF OPERATION
FreeStar Pro power management is controlled through the Freescale MC13224V’s Clock and Reset Module (CRM). The
CRM is a dedicated module to handle clock, reset, and power management functions including control of the power regula-
tors. All these functions have direct impact on attaining the lowest power.
The FreeStar Pro module supports three modes of operation: Active, Doze and Hibernation. The latter two modes are the
low-power sleep modes.
Active Mode
In this mode all functions / features are operating normally.
Doze Mode
Doze mode provides significant reduction in power consumption while still maintaining a high degree of sleep timing accu-
racy. In Doze mode, the reference oscillator of the processor continues to operate normally.
Hibernation Mode
Hibernation mode provides the greatest reduction in power consumption however the sleep timing accuracy is not as pre-
cise as in Doze mode.
The CRM manages the recovery from the low-power modes, similar to power-up from reset, providing regulator and clock
management.
The module can be awoken from the low-power modes in 3 ways, wake-up can occur:
For more detail information on modes of operation refer to Freescale’s MC13224V datasheet available at
Freescale’s website (www.freescale.com)
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On external interrupts through any of the 4 Keyboard Interface inputs
From internal interrupts
On the Real Time (wake-up) timer interrupt
Page 5
ZFSM-201 Series