Quectel UC20 Hardware Design page 51

Table 20: Pin Definition of SLEEP_IND
Pin Name
SLEEP_IND
A reference circuit is shown in the following figure.
Module still periodically monitors the paging channel of the current base station (paging block reception)
during the sleep mode. When the module monitors the paging channel, it wakes up to active mode, to
enable the reception of paging block. In between, the module switches to sleep mode.
The following figure shows the paging timing cycle (T) during sleep mode.
SLEEP_IND
UC20_Hardware_Design
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Pin No. I/O
3 DO
Module
SLEEP_IND
Figure 31: Reference Circuit of the SLEEP_IND
Sleep
Paging
Figure 32: Relationship between Sleep and Network Paging
Description
Indicate the sleep status.
4.7K
47K
Sleep Sleep
T
Paging
Confidential / Released
UMTS/HSPA Module Series
UC20 Hardware Design
Comment
1.8V power domain.
Outputs high level when the
module is in sleep mode.
VBAT
2.2K
Sleep
T
Paging
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