User Manual

TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R08 Early Production Information System description
Page 19 of 158
1.4 Operating modes
TOBY-L2 and MPCI-L2 series modules have several operating modes. The operating modes are defined in Table 5
and described in detail in Table 6, providing general guidelines for operation.
General Status
Operating Mode
Definition
Power-down
Not-Powered Mode
VCC or 3.3Vaux supply not present or below operating range: module is switched off.
Power-Off Mode
VCC or 3.3Vaux supply within operating range and module is switched off.
Normal Operation
Idle-Mode
Module processor core runs with 32 kHz reference generated by the internal oscillator.
Active-Mode
Module processor core runs with 26 MHz reference generated by the internal oscillator.
Connected-Mode
RF Tx/Rx data connection enabled and processor core runs with 26 MHz reference.
Table 5: TOBY-L2 and MPCI-L2 series modules operating modes definition
Operating Mode
Description
Transition between operating modes
Not-Powered Mode
Module is switched off.
Application interfaces are not accessible.
When VCC or 3.3Vaux supply is removed, the modules
enter not-powered mode.
When in not-powered mode, TOBY-L2 modules cannot be
switched on by PWR_ON, RESET_N or RTC alarm and
enter active-mode after applying VCC supply (see 1.6.1).
When in not-powered mode, MPCI-L2 modules cannot be
switched on by RTC alarm and enter active-mode after
applying 3.3Vaux supply (see 1.6.1).
Power-Off Mode
Module is switched off: normal shutdown by an
appropriate power-off event (see 1.6.2).
Application interfaces are not accessible.
MPCI-L2 modules do not support Power-Off Mode
but halt mode (see 1.6.2 and u-blox AT Commands
Manual [3], AT+CFUN=127 command).
When the modules are switched off by an appropriate
power-off event (see 1.6.2), the modules enter power-off
mode from active-mode.
When in power-off mode, TOBY-L2 modules can be
switched on by PWR_ON, RESET_N or an RTC alarm.
When in power-off mode, TOBY-L2 modules enter the
not-powered mode after removing VCC supply.
Idle-Mode
Module is switched on with application interfaces
disabled or suspended: the module is temporarily not
ready to communicate with an external device by
means of the application interfaces as configured to
reduce the current consumption.
The module enters the low power idle-mode
whenever possible if power saving is enabled by
AT+UPSV (see u-blox AT Commands Manual [3])
reducing current consumption (see 1.5.1.5).
With HW flow control enabled and AT+UPSV=1 or
AT+UPSV=3, the UART CTS line indicates when the
UART is enabled (see 1.9.2.3, 1.9.2.4).
With HW flow control disabled, the UART CTS line is
fixed to ON state (see 1.9.2.3).
Power saving configuration is not enabled by default:
it can be enabled by the AT+UPSV command (see
the u-blox AT Commands Manual [3]).
The modules automatically switch from active-mode to low
power idle-mode whenever possible if power saving is
enabled (see sections 1.5.1.5, 1.9.1.4, 1.9.2.4 and u-blox
AT Commands Manual [3], AT+UPSV).
The modules wake up from idle-mode to active-mode in
the following events:
 Automatic periodic monitoring of the paging channel
for the paging block reception according to network
conditions (see 1.5.1.5)
 The connected USB host forces a remote wakeup of
the module as USB device (see 1.9.1.4)
 Automatic periodic enable of the UART interface to
receive / send data, with AT+UPSV=1 (see 1.9.2.4)
 Data received on UART interface, with HW flow
control disabled and AT+UPSV=1 (see 1.9.2.4)
 RTS input set ON by the host DTE, with HW flow
control disabled and AT+UPSV=2 (see 1.9.2.4)
 DTR input set ON by the host DTE, with AT+UPSV=3
(see 1.9.2.4)
 The connected SDIO device forces a wakeup of the
module as SDIO host (see 1.9.4)
 A preset RTC alarm occurs (see u-blox AT Commands
Manual [3], AT+CALA)