MediaTek LinkIt™ Connect 7681 API Reference
2.8 Power Saving Level
Request the MT7681 to enter a sleep state at a particular power saving level.
Command
PowerSaving
Argument Descriptions
-l <PowerSaving Level> (1~5)
-t <PowerSleep Time> (0~0xFFFFFF (unit: us))
-r <read PowerSaving Level>
Example
AT#PowerSaving -l1 -t0xFFFFFF
AT#PowerSaving -r<Space>
MT7681 will go into deep sleep when it receives the command AT#PowerSaving –l1 –t0xFFFFFF,
and will wake after 0xFFFFFF micro seconds (16.777215 seconds).
This command is available in Station mode only.
There are 5 power saving levels for MT7681 station mode: in each power saving level the MT7681
disables more internal modules (Blocks) as listed in Table 1.
Level Disabled Blocks Wakeup Time
Level 5 Switch Regulator, LDO_DIG, Crystal, BBPLL and CPU clock 3 to 20ms
Level 4 LDO_DIG, Crystal, BBPLL and CPU clock 1 to 20ms
Level 3 Crystal, BBPLL and CPU clock 1 to 20ms
Level 2 BBPLL and CPU clock 200us
Level 1 CPU clock 2us
Table 1 Power saving levels of the MT7681
Level 5 offers the most power saving and has the longest wakeup period. When MT7681 is in a power
saving state, it can be woken by an internal power saving counter. When the power saving level is 1 or
2 the MT7681 will wake and handle any UART or GPIO interrupt. However, when in power saving
level 3, 4 or 5 the MT7681 will NOT wake on a UART or GPIO interrupt.
At the time of writing, power saving isn’t available while the MT7681 is in AP mode.
© 2015 MediaTek Inc. Page 8 of 44
This document contains information that is proprietary to MediaTek Inc.
Unauthorized reproduction or disclosure of this information in whole or in part is strictly prohibited.
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