MAX-7 / NEO-7 - Hardware Integration Manual
UBX-13003704
-
R09
Production Information
Hardware
description
Page
14 of 52
2.7.4
TX Ready signal
The TX Ready signal indicates that the receiver has data to transmit. A listener can wait on the TX Ready signal
instead of polling the DDC or SPI interfaces. The UBX-CFG-PRT message lets you configure the polarity and the
number of bytes in the buffer before the TX Ready signal goes active. The TX Ready signal can be mapped to
UART TXD (PIO 06). The TX Ready function is disabled by default.
The TX-ready functionality can be enabled and configured by proper AT commands sent to the involved
u-blox cellular module supporting the feature. For more information see
GPS Implementation and Aiding
Features in u-blox wireless modules [10].
2.7.5
ANT_ON: Antenna ON (LNA enable) (NEO-7N, MAX-7Q, MAX-7C)
In Power Save Mode, the system can turn on/off an optional external LNA using the ANT_ON signal in order to
optimize power consumption. A pull-down resistor (10 kOhm) is required to ensure correct operation in backup
mode of the ANT_ON signal.
2.7.6
Antenna Short circuit detection (MAX-7W)
The MAX-7W module includes internal short circuit antenna detection. For more information, see
section
2.7.7
Antenna open circuit detection
2.7.7.1
Antenna open circuit detection (MAX-7)
Antenna open circuit detection (OCD) is not activated by default on the MAX-7 module. OCD can be mapped to
PIO13 (
EXTINT
). For more information about how to implement OCD, see section 3.4.3.3. To learn how to
configure OCD see the
u-blox 7 Receiver Description including Protocol Specification
2.7.8
Time pulse
A configurable time pulse signal is available with all u-blox 7 modules. By default, the time pulse signal is
configured to 1 pulse per second. For more information see the
u-blox 7 Receiver Description including Protocol
