User's Manual

TOBY-R2 series - System Integration Manual
UBX-16010572 - R04 System description
Page 16 of 147
1.4 Operating modes
TOBY-R2 series modules have several operating modes. The operating modes are defined in Table 4 and
described in detail in Table 5, providing general guidelines for operation.
General Status
Operating Mode
Definition
Power-down
Not-Powered Mode
VCC supply not present or below operating range: module is switched off.
Power-Off Mode
VCC 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 4: TOBY-R2 series modules operating modes definition
Mode
Description
Transition between operating modes
Not-Powered
Module is switched off.
Application interfaces are not accessible.
When VCC supply is removed, the modules enter not-powered mode.
When in not-powered mode, the modules cannot be switched on by
PWR_ON, RESET_N or RTC alarm
When in not-powered mode, the modules can be switched on by
applying VCC supply (see 1.6.1) so that the modules switch from not-
powered to active-mode
Power-Off
Module is switched off: normal shutdown by an
appropriate power-off event (see 1.6.2).
Application interfaces are not accessible.
When the modules are switched off by an appropriate switch-off event
(see 1.6.2), the modules enter power-off mode from active-mode.
When in power-off mode, the modules can be switched on by
PWR_ON, RESET_N or an RTC alarm.
When in power-off mode, the modules enter not-powered mode by
removing VCC supply.
Idle
Module is switched on with application
interfaces temporarily 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 [2])
reducing current consumption (see 1.5.1.5).
The CTS output line indicates when the UART
interface is disabled/enabled due to the module
idle/active-mode according to power saving and
HW flow control settings (see 1.9.1.3, 1.9.1.4).
Power saving configuration is not enabled by
default: it can be enabled by AT+UPSV (see the
u-blox AT Commands Manual [2]).
The modules automatically switch from the 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 [2],
AT+UPSV command).
The modules wake up from low power 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, 1.9.1.4)
 Automatic periodic enable of the UART interface to receive / send
data, with AT+UPSV=1 (see 1.9.1.4)
 Data received over UART, according to HW flow control (AT&K)
and power saving (AT+UPSV) settings (see 1.9.1.4)
 RTS input set ON by the host DTE, with HW flow control disabled
and AT+UPSV=2 (see 1.9.1.4)
 DTR input set ON by the host DTE, with AT+UPSV=3 (see 1.9.1.4)
 USB detection, applying 5 V (typ.) to VUSB_DET input (see 1.9.2)
 The connected USB host forces a remote wakeup of the module as
USB device (see 1.9.2.4)
 The connected u-blox GNSS receiver forces a wakeup of the
cellular module using the GNSS Tx data ready function over GPIO3
(see 1.9.3)
 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 [2],
AT+CALA)