Operating Modes - Quectel M35 User Manual

PCM_
12
SYNC
PCM_
26
CLK
PCM_
41
OUT
PCM_IN 42
Table 4: Multiplexed Functions
PIN NAME
STATUS/PCM_SYNC
DTR/SIM1_PRESENCE
DCD/SIM2_RST
RI/PCM_CLK
NOTE
1)
The alternate function can be configured through AT command. For details, please refer to the section
3.9 and section 3.10.
3.2.

Operating Modes

The table below briefly summarizes the various operating modes in the following chapters.
Table 5: Overview of Operating Modes
Mode
Normal Operation
M35_User_Manual
O PCM sync signal
O PCM clock signal
O PCM serial data output
I PCM serial data input
PIN NO. Function After Reset
12 STATUS
20 DTR
25 DCD
26 RI
Function
After enabling sleep mode by ―AT+QSCLK=1‖, the module
will automatically go into Sleep Mode if DTR is set to high
GSM/GPRS
level and there is no interrupt (such as GPIO interrupt or
Sleep
data on UART port). In this case, the current consumption
of module will be reduced to the minimal level. During
Confidential / Released
GSM/GPRS Module Series
VILmin=-0.3V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
VDD_EXT+0.2
VOHmin=
0.85×VDD_EXT
VOLmax=
0.15×VDD_EXT
Alternate Function
PCM_SYNC
SIM1_PRESENCE
SIM2_RST
PCM_CLK
M35 User Manual
The default
function is
STATUS after
startup.
The default
function is RI after
startup.
If unused, keep
these pins open.
1)
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