Ublox SARA-G450 Series, Руководство по системной интеграции, Страница: 36 / 143

SARA-G450 - System integration manual
UBX-18046432 - R08 System description Page 36 of 143
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AT+UPSV HW flow control RTS line Communication during idle mode and wake-up
0 Enabled (AT&K3) ON Data sent by the DTE are correctly received by the module.
Data sent by the module is correctly received by the DTE.
0 Enabled (AT&K3) OFF Data sent by the DTE should be buffered by the DTE and will be correctly
received by the module when RTS is set to ON.
Data sent by the module is buffered by the module and will be correctly
received by the DTE when it is ready to receive data (i.e. RTS line will be ON).
0 Disabled (AT&K0) ON or OFF Data sent by the DTE is correctly received by the module.
Data sent by the module is correctly received by the DTE if it is ready to receive
data, otherwise data is lost.
1 Enabled (AT&K3) ON Data sent by the DTE should be buffered by the DTE and sent to the module
when active mode is entered. The first character sent by DTE is lost, but after
~20 ms the UART is ready to receive data and recognition of subsequent
characters is guaranteed.
Data sent by the module is correctly received by the DTE.
1 Enabled (AT&K3) OFF Data sent by the DTE should be buffered by the DTE and sent to the module
when active mode is entered. The first character sent by DTE is lost, but after
~20 ms the UART is ready to receive data and recognition of subsequent
characters is guaranteed.
Data sent by the module is buffered by the module and will be correctly
received by the DTE when it is ready to receive data (i.e. RTS line will be ON).
1 Disabled (AT&K0) ON or OFF The first character sent by the DTE is lost, but after ~20 ms the UART and the
module are woken up: recognition of subsequent characters is guaranteed
after the complete UART / module wake-up.
Data sent by the module is correctly received by the DTE if it is ready to receive
data, otherwise data is lost.
2 Enabled (AT&K3) ON or OFF Not Applicable: HW flow control cannot be enabled with AT+UPSV=2.
2 Disabled (AT&K0) ON Data sent by the DTE is correctly received by the module.
Data sent by the module is correctly received by the DTE if it is ready to receive
data, otherwise data is lost.
2 Disabled (AT&K0) OFF
The first character sent by the DTE is lost, but after ~20 ms the UART and the
module are waked up: recognition of subsequent characters is guaranteed
after the complete UART / module wake-up.
Data sent by the module is correctly received by the DTE if it is ready to receive
data, otherwise data is lost.
Table 9: UART and power-saving summary
AT+UPSV=0: power saving disabled, fixed active mode
The module does not enter idle mode and the UART interface is enabled (data can be sent and
received): the CTS line is always held in the ON state after UART initialization. This is the default
configuration.
AT+UPSV=1: power saving enabled, cyclic idle/active mode
When the AT+UPSV=1 command is issued by the DTE, the UART is disabled after the timeout set by
the second parameter of the +UPSV AT command (for more details, see the u-blox AT commands
manual
[11] ).
The module automatically enters the low power idle mode whenever possible but it wakes up to active
mode according to any required activity related to the network or any other required activity related
to the functions / interfaces, so that the module cyclically enters the low power idle mode and the
active mode.