ODIN-W2 series - System integration manual
UBX-14040040 - R20
System description
Page 14 of 43
C1-Public
1.3.2
Generic digital interfaces supply output (V_INT)
The ODIN-W2 series modules provide a 1.8 V supply rail output through the V_INT pin, which is
internally generated when the module has VCC supply. The same voltage domain is used internally to
supply the generic digital interfaces of the modules. The V_INT supply output can be used instead of
an external discrete regulator.
The V_INT supply is available 2.5 ms after applying the VCC.
1.4
System function interfaces
1.4.1
Module reset
You can reset (reboot) the ODIN-W2 series modules using one of the following methods:
•
Hardware reset: Low level on the RESET_N pin, which is normally set high by an internal pull-up,
for a valid time period (see ODIN-W2 series Data sheet [2]). This causes an “external” or “hardware”
reset of the module. The RESET_N line should be driven by open drain, open collector or contact
switch.
•
Software reset with an AT command: This causes an “internal” or “software” reset of the module.
See
u-blox Short range AT commands manual [1] for more information.
1.4.2
External low power clock for power saving modes
An external 32.768 kHz Low Power Clock (LPO) is required for using power saving modes. See the
u-blox Short Range AT Commands Manual [1] for more information about the different power saving
modes. The clock must be available during start-up (after power on or while leaving the reset-state).
See the low power clock (LPO_CLK) design section for more information about external LPO clock
design. The LPO clock should be left unconnected if not needed in the design. See
ODIN-W2 series
Data sheet [2] for electrical requirements.
1.4.3
System input and output signals
The module can be in the Command mode, Data mode, and Extended Data mode. The RED, GREEN,
BLUE and UART DTR signals are used to indicate the status.
The UART_DTR pin can be set to indicate whether the module is in one of the below-mentioned modes:
•
Data mode
•
Command mode
•
If there are any remote peers connected to the module
The UART_DSR pin can used to put the module in Command or it can be used to disconnect all remote
pears. For more details see the
u-blox Short range AT commands manual [1].
Table 4 describes the default setup of the RED, GREEN and BLUE System iOS. For more information,
see the
u-blox Short range AT commands manual [1] and Pin attributes section.
Mode
Status
RGB LED Color
GREEN GPIO
BLUE GPIO
RED GPIO
Data mode, EDM
IDLE
Green
LOW
HIGH
HIGH
Command mode
IDLE
Orange
LOW
HIGH
LOW
Data mode, Command mode, EDM
CONNECTING
Purple
HIGH
LOW
LOW
Data mode, Command mode, EDM
CONNECTED1
Blue
HIGH
LOW
HIGH
Table 4: LED Signal states in different module modes
1
On data activity, the active LED flashes.
